Lithium-ion battery (LIB)-based electric vehicles (EVs) are regarded as a critical technology for the decarbonization of transportation. The rising demand for EVs has triggered concerns on the supply risks of lithium and some transition metals such as cobalt and nickel needed for cathode manufacturing. There are also concerns about environmental damage from current recycling and disposal practices, as several spent LIBs are reaching the end of their life in the next few decades. Proper LIB end-of-life management can alleviate supply risks of critical materials while minimizing environmental pollution. Direct recycling, which aims at recovering active materials in the cathode and chemically upgrading said materials for new cathode manufacturing, is promising. Compared with pyrometallurgical and hydrometallurgical recycling, direct recycling has closed the material loop in cathode manufacturing via a shorter pathway and attracted attention over the past few years due to its economic and environmental competitiveness. This paper reviews current direct recycling technologies for the cathode, which is considered as the material with the highest economic value in LIBs. We structure this review in line with the direct recycling process sequence: cathode material collection, separation of cathode active materials from other components, and regeneration of degraded cathode active materials. Methods to harvest cathode active materials are well studied. Efforts are required to minimize fluoride emissions during complete separation of cathode active materials from binders and carbon. Regeneration for homogeneous cathode is achieved via solid-state or hydrothermal re-lithiation. However, the challenge of how to process different cathode chemistries together in direct recycling needs to be solved. Overall, the development of direct recycling provides the possibility to accelerate the sustainable recycling of spent LIBs from electric vehicles.
Citation: Yi Ji, Edwin E. Kpodzro, Chad T. Jafvert, Fu Zhao. Direct recycling technologies of cathode in spent lithium-ion batteries[J]. Clean Technologies and Recycling, 2021, 1(2): 124-151. doi: 10.3934/ctr.2021007
Lithium-ion battery (LIB)-based electric vehicles (EVs) are regarded as a critical technology for the decarbonization of transportation. The rising demand for EVs has triggered concerns on the supply risks of lithium and some transition metals such as cobalt and nickel needed for cathode manufacturing. There are also concerns about environmental damage from current recycling and disposal practices, as several spent LIBs are reaching the end of their life in the next few decades. Proper LIB end-of-life management can alleviate supply risks of critical materials while minimizing environmental pollution. Direct recycling, which aims at recovering active materials in the cathode and chemically upgrading said materials for new cathode manufacturing, is promising. Compared with pyrometallurgical and hydrometallurgical recycling, direct recycling has closed the material loop in cathode manufacturing via a shorter pathway and attracted attention over the past few years due to its economic and environmental competitiveness. This paper reviews current direct recycling technologies for the cathode, which is considered as the material with the highest economic value in LIBs. We structure this review in line with the direct recycling process sequence: cathode material collection, separation of cathode active materials from other components, and regeneration of degraded cathode active materials. Methods to harvest cathode active materials are well studied. Efforts are required to minimize fluoride emissions during complete separation of cathode active materials from binders and carbon. Regeneration for homogeneous cathode is achieved via solid-state or hydrothermal re-lithiation. However, the challenge of how to process different cathode chemistries together in direct recycling needs to be solved. Overall, the development of direct recycling provides the possibility to accelerate the sustainable recycling of spent LIBs from electric vehicles.
[1] | Wang Y, Liu B, Li Q, et al. (2015) Lithium and lithium ion batteries for applications in microelectronic devices: A review. J Power Sources 286: 330-345. doi: 10.1016/j.jpowsour.2015.03.164 |
[2] | Jones B, Elliott RJR, Nguyen-Tien V (2020) The EV revolution: The road ahead for critical raw materials demand. Appl Energy 280: 115072. doi: 10.1016/j.apenergy.2020.115072 |
[3] | Jacoby M (2019) It's time to get serious about recycling lithium-ion batteries. Chem Eng News 28. |
[4] | Turcheniuk K, Bondarev D, Singhal V, et al. (2018) Ten years left to redesign lithium-ion batteries. Nature 559: 467-470. doi: 10.1038/d41586-018-05752-3 |
[5] | Lv W, Wang Z, Cao H, et al. (2018) A Critical Review and Analysis on the Recycling of Spent Lithium-Ion Batteries. ACS Sustainable Chem Eng 6: 1504-1521. doi: 10.1021/acssuschemeng.7b03811 |
[6] | Richa K, Babbitt CW, Gaustad G, et al. (2014) A future perspective on lithium-ion battery waste flows from electric vehicles. Resour Conserv Recycl 83: 63-76. doi: 10.1016/j.resconrec.2013.11.008 |
[7] | Winslow KM, Laux SJ, Townsend TG (2018) A review on the growing concern and potential management strategies of waste lithium-ion batteries. Resour Conserv Recycl 129: 263-277. doi: 10.1016/j.resconrec.2017.11.001 |
[8] | Lagadec MF, Zahn R, Wood V (2018) Characterization and performance evaluation of lithium-ion battery separators. Nat Energy 4: 16-25. doi: 10.1038/s41560-018-0295-9 |
[9] | Aravindan V, Gnanaraj J, Madhavi S, et al. (2011) Lithium-Ion Conducting Electrolyte Salts for Lithium Batteries. Chem A Eur J 17: 14326-14346. doi: 10.1002/chem.201101486 |
[10] | Zhang SS (2006) A review on electrolyte additives for lithium-ion batteries. J Power Sources 162: 1379-1394. doi: 10.1016/j.jpowsour.2006.07.074 |
[11] | Xie J, Lu YC (2020) A retrospective on lithium-ion batteries. Nat Commun 11: 2499. doi: 10.1038/s41467-020-16259-9 |
[12] | Li M, Lu J, Chen Z, et al. (2018) 30 Years of Lithium-Ion Batteries. Adv Mater 30: 1800561. doi: 10.1002/adma.201800561 |
[13] | Dunn JB, James C, Gaines L, et al. (2015) Material and Energy Flows in the Production of Cathode and Anode Materials for Lithium Ion Batteries. Argonne National Lab. (ANL), Argonne, IL (United States). |
[14] | Ponrouch A, Palacín MR (2011) On the impact of the slurry mixing procedure in the electrochemical performance of composite electrodes for Li-ion batteries: A case study for mesocarbon microbeads (MCMB) graphite and Co3O4. J Power Sources 196: 9682-9688. doi: 10.1016/j.jpowsour.2011.07.045 |
[15] | Ludwig B, Zheng Z, Shou W, et al. (2016) Solvent-Free Manufacturing of Electrodes for Lithium-ion Batteries. Sci Rep 6: 23150. doi: 10.1038/srep23150 |
[16] | Guerfi A, Kaneko M, Petitclerc M, et al. (2007) LiFePO4 water-soluble binder electrode for Li-ion batteries. J Power Sources 163: 1047-1052. doi: 10.1016/j.jpowsour.2006.09.067 |
[17] | Kim S, Bang J, Yoo J, et al. (2021) A comprehensive review on the pretreatment process in lithium-ion battery recycling. J Cleaner Prod 294: 126329. doi: 10.1016/j.jclepro.2021.126329 |
[18] | Gaines L (2019) Profitable Recycling of Low-Cobalt Lithium-Ion Batteries Will Depend on New Process Developments. One Earth 1: 413-415. doi: 10.1016/j.oneear.2019.12.001 |
[19] | Makuza B, Tian Q, Guo X, et al. (2021) Pyrometallurgical options for recycling spent lithium-ion batteries: A comprehensive review. J Power Sources 491: 229622. doi: 10.1016/j.jpowsour.2021.229622 |
[20] | Zhang X, Li L, Fan E, et al. (2018) Toward sustainable and systematic recycling of spent rechargeable batteries. Chem Soc Rev 47: 7239-7302. doi: 10.1039/C8CS00297E |
[21] | Chagnes A, Pospiech B (2013) A brief review on hydrometallurgical technologies for recycling spent lithium-ion batteries. J Chem Technol Biotechnol 88: 1191-1199. doi: 10.1002/jctb.4053 |
[22] | Larcher D, Tarascon JM (2015) Towards greener and more sustainable batteries for electrical energy storage. Nat Chem 7: 19-29. doi: 10.1038/nchem.2085 |
[23] | Harper G, Sommerville R, Kendrick E, et al. (2019) Recycling lithium-ion batteries from electric vehicles. Nature 575: 75-86. doi: 10.1038/s41586-019-1682-5 |
[24] | Ciez RE, Whitacre JF (2019) Examining different recycling processes for lithium-ion batteries. Nat Sustainability 2: 148-156. doi: 10.1038/s41893-019-0222-5 |
[25] | Sommerville R, Shaw-Stewart J, Goodship V, et al. (2020) A review of physical processes used in the safe recycling of lithium ion batteries. Sustainable Mater Technol 25. |
[26] | Zhang T, He Y, Ge L, et al. (2013) Characteristics of wet and dry crushing methods in the recycling process of spent lithium-ion batteries. J Power Sources 240: 766-771. doi: 10.1016/j.jpowsour.2013.05.009 |
[27] | Zhang T, He Y, Wang F, et al. (2014) Chemical and process mineralogical characterizations of spent lithium-ion batteries: an approach by multi-analytical techniques. Waste Manag 34: 1051-1058. doi: 10.1016/j.wasman.2014.01.002 |
[28] | Barik SP, Prabaharan G, Kumar L (2017) Leaching and separation of Co and Mn from electrode materials of spent lithium-ion batteries using hydrochloric acid: Laboratory and pilot scale study. J Cleaner Prod 147: 37-43. doi: 10.1016/j.jclepro.2017.01.095 |
[29] | Diekmann J, Hanisch C, Frobö se L, et al. (2016) Ecological Recycling of Lithium-Ion Batteries from Electric Vehicles with Focus on Mechanical Processes. J Electrochem Soc 164: A6184-A6191. doi: 10.1149/2.0271701jes |
[30] | Yu J, He Y, Ge Z, et al. (2018) A promising physical method for recovery of LiCoO 2 and graphite from spent lithium-ion batteries: Grinding flotation. Sep Purif Technol 190: 45-52. doi: 10.1016/j.seppur.2017.08.049 |
[31] | Li L, Ge J, Wu F, et al. (2010) Recovery of cobalt and lithium from spent lithium ion batteries using organic citric acid as leachant. J Hazard Mater 176: 288-293. doi: 10.1016/j.jhazmat.2009.11.026 |
[32] | Guan J, Li Y, Guo Y, et al. (2016) Mechanochemical Process Enhanced Cobalt and Lithium Recycling from Wasted Lithium-Ion Batteries. ACS Sustainable Chem Eng 5: 1026-1032. doi: 10.1021/acssuschemeng.6b02337 |
[33] | Silveira AVM, Santana MP, Tanabe EH, et al. (2017) Recovery of valuable materials from spent lithium ion batteries using electrostatic separation. Int J Miner Process 169: 91-98. doi: 10.1016/j.minpro.2017.11.003 |
[34] | Widijatmoko SD, Fu G, Wang Z, et al. (2020) Recovering lithium cobalt oxide, aluminium, and copper from spent lithium-ion battery via attrition scrubbing. J Cleaner Prod 260: 120869. doi: 10.1016/j.jclepro.2020.120869 |
[35] | Gratz E, Sa Q, Apelian D, et al. (2014) A closed loop process for recycling spent lithium ion batteries. J Power Sources 262: 255-262. doi: 10.1016/j.jpowsour.2014.03.126 |
[36] | Pinegar H, Smith YR (2019) Recycling of End-of-Life Lithium Ion Batteries, Part I: Commercial Processes. J Sustainable Metall 5: 402-416. doi: 10.1007/s40831-019-00235-9 |
[37] | Xue M, Xu Z (2013) Computer simulation of the pneumatic separator in the pneumatic-electrostatic separation system for recycling waste printed circuit boards with electronic components. Environ Sci Technol 47: 4598-4604. doi: 10.1021/es400154g |
[38] | Huang K, Li J, Xu Z (2011) Enhancement of the recycling of waste Ni-Cd and Ni-MH batteries by mechanical treatment. Waste Manag 31: 1292-1299. doi: 10.1016/j.wasman.2011.01.006 |
[39] | Zhong X, Liu W, Han J, et al. (2020) Pneumatic separation for crushed spent lithium-ion batteries. Waste Manag 118: 331-340. doi: 10.1016/j.wasman.2020.08.053 |
[40] | Zhu X, Zhang C, Feng P, et al. (2021) A novel pulsated pneumatic separation with variable-diameter structure and its application in the recycling spent lithium-ion batteries. Waste Manag 131: 20-30. doi: 10.1016/j.wasman.2021.05.027 |
[41] | Bertuol DA, Toniasso C, Jiménez BM, et al. (2015) Application of spouted bed elutriation in the recycling of lithium ion batteries. J Power Sources 275: 627-632. doi: 10.1016/j.jpowsour.2014.11.036 |
[42] | Bi H, Zhu H, Zu L, et al. (2019) A new model of trajectory in eddy current separation for recovering spent lithium iron phosphate batteries. Waste Manag 100: 1-9. doi: 10.1016/j.wasman.2019.08.041 |
[43] | Marinos D, Mishra B (2015) An Approach to Processing of Lithium-Ion Batteries for the Zero-Waste Recovery of Materials. J Sustainable Metall 1: 263-274. doi: 10.1007/s40831-015-0024-6 |
[44] | Widijatmoko SD, Gu F, Wang Z, et al. (2020) Selective liberation in dry milled spent lithium-ion batteries. Sustainable Mater Technol 23: e00134. doi: 10.1016/j.susmat.2019.e00134 |
[45] | Peng C, Liu F, Aji AT, et al. (2019) Extraction of Li and Co from industrially produced Li-ion battery waste - Using the reductive power of waste itself. Waste Manag 95: 604-611. doi: 10.1016/j.wasman.2019.06.048 |
[46] | Vieceli N, Nogueira CA, Guimaraes C, et al. (2018) Hydrometallurgical recycling of lithium-ion batteries by reductive leaching with sodium metabisulphite. Waste Manag 71: 350-361. doi: 10.1016/j.wasman.2017.09.032 |
[47] | Chen H, Ling M, Hencz L, et al. (2018) Exploring Chemical, Mechanical, and Electrical Functionalities of Binders for Advanced Energy-Storage Devices. Chem Rev 118: 8936-8982. doi: 10.1021/acs.chemrev.8b00241 |
[48] | He K, Zhang ZY, Alai L, et al. (2019) A green process for exfoliating electrode materials and simultaneously extracting electrolyte from spent lithium-ion batteries. J Hazard Mater 375: 43-51. doi: 10.1016/j.jhazmat.2019.03.120 |
[49] | Bottino A, Capannelli G, Munari S, et al. (1988) Solubility parameters of poly (vinylidene fluoride). J Polym Sci 26: 785-794. doi: 10.1002/polb.1988.090260405 |
[50] | Hanisch C, Haselrieder W, Kwade A (2011) Recovery of Active Materials from Spent Lithium-Ion Electrodes and Electrode Production Rejects. Glocalized Solutions Sustainability Manuf 85-89. |
[51] | Song D, Wang X, Zhou E, et al. (2013) Recovery and heat treatment of the Li(Ni1/3Co1/3Mn1/3)O2 cathode scrap material for lithium ion battery. J Power Sources 232: 348-352. doi: 10.1016/j.jpowsour.2012.10.072 |
[52] | Song X, Hu T, Liang C, et al. (2017) Direct regeneration of cathode materials from spent lithium iron phosphate batteries using a solid phase sintering method. RSC Adv 7: 4783-4790. doi: 10.1039/C6RA27210J |
[53] | Bankole OE, Gong C, Lei L (2013) Battery Recycling Technologies: Recycling Waste Lithium Ion Batteries with the Impact on the Environment In-View. J Environ Ecol 4: 14-28. doi: 10.5296/jee.v4i1.3257 |
[54] | He LP, Sun SY, Song XF, et al. (2015) Recovery of cathode materials and Al from spent lithium-ion batteries by ultrasonic cleaning. Waste Manag 46: 523-528. doi: 10.1016/j.wasman.2015.08.035 |
[55] | Bai Y, Hawley WB, Jafta CJ, et al. (2020) Sustainable recycling of cathode scraps via Cyrene-based separation. Sustainable Mater Technol 25: e00202. doi: 10.1016/j.susmat.2020.e00202 |
[56] | Zeng X, Li J (2014) Innovative application of ionic liquid to separate Al and cathode materials from spent high-power lithium-ion batteries. J Hazard Mater 271: 50-56. doi: 10.1016/j.jhazmat.2014.02.001 |
[57] | Wang M, Tan Q, Liu L, et al. (2019) A low-toxicity and high-efficiency deep eutectic solvent for the separation of aluminum foil and cathode materials from spent lithium-ion batteries. J Hazard Mater 380: 120846. doi: 10.1016/j.jhazmat.2019.120846 |
[58] | Bai Y, Muralidharan N, Li J, et al. (2020) Sustainable Direct Recycling of Lithium‐Ion Batteries via Solvent Recovery of Electrode Materials. ChemSusChem 13: 5664-5670. doi: 10.1002/cssc.202001479 |
[59] | Wang M, Tan Q, Liu L, et al. (2020) Revealing the Dissolution Mechanism of Polyvinylidene Fluoride of Spent Lithium-Ion Batteries in Waste Oil-Based Methyl Ester Solvent. ACS Sustainable Chem Eng 8: 7489-7496. doi: 10.1021/acssuschemeng.0c02072 |
[60] | Wang H, Liu J, Bai X, et al. (2019) Separation of the cathode materials from the Al foil in spent lithium-ion batteries by cryogenic grinding. Waste Manag 91: 89-98. doi: 10.1016/j.wasman.2019.04.058 |
[61] | Wang M, Tan Q, Liu L, et al. (2019) Efficient Separation of Aluminum Foil and Cathode Materials from Spent Lithium-Ion Batteries Using a Low-Temperature Molten Salt. ACS Sustainable Chem Eng 7: 8287-8294. doi: 10.1021/acssuschemeng.8b06694 |
[62] | Ji Y, Jafvert CT, Zhao F (2021) Recovery of cathode materials from spent lithium-ion batteries using eutectic system of lithium compounds. Resour Conserv Recycl 170: 105551. doi: 10.1016/j.resconrec.2021.105551 |
[63] | Zhang X, Xue Q, Li L, et al. (2016) Sustainable Recycling and Regeneration of Cathode Scraps from Industrial Production of Lithium-Ion Batteries. ACS Sustainable Chem Eng 4: 7041-7049. doi: 10.1021/acssuschemeng.6b01948 |
[64] | Lee SH, Kim HS, Jin BS (2019) Recycling of Ni-rich Li(Ni0.8Co0.1Mn0.1)O2 cathode materials by a thermomechanical method. J Alloys Compd 803: 1032-1036. doi: 10.1016/j.jallcom.2019.06.229 |
[65] | Nie XJ, Xi XT, Yang Y, et al. (2019) Recycled LiMn2O4 from the spent lithium ion batteries as cathode material for sodium ion batteries: Electrochemical properties, structural evolution and electrode kinetics. Electrochim Acta 320: 134626. doi: 10.1016/j.electacta.2019.134626 |
[66] | Ku H, Jung Y, Jo M, et al. (2016) Recycling of spent lithium-ion battery cathode materials by ammoniacal leaching. J Hazard Mater 313: 138-146. doi: 10.1016/j.jhazmat.2016.03.062 |
[67] | DeLisio JB, Hu X, Wu T, et al. (2016) Probing the Reaction Mechanism of Aluminum/Poly(vinylidene fluoride) Composites. J Phys Chem B 120: 5534-5542. doi: 10.1021/acs.jpcb.6b01100 |
[68] | Chen Y, Liu N, Jie Y, et al. (2019) Toxicity Identification and Evolution Mechanism of Thermolysis-Driven Gas Emissions from Cathodes of Spent Lithium-Ion Batteries. ACS Sustainable Chem Eng 7: 18228-18235. doi: 10.1021/acssuschemeng.9b03739 |
[69] | Wang M, Tan Q, Li J (2018) Unveiling the Role and Mechanism of Mechanochemical Activation on Lithium Cobalt Oxide Powders from Spent Lithium-Ion Batteries. Environ Sci Technol 52: 13136-13143. doi: 10.1021/acs.est.8b03469 |
[70] | Nan J, Han D, Zuo X (2005) Recovery of metal values from spent lithium-ion batteries with chemical deposition and solvent extraction. J Power Sources 152: 278-284. doi: 10.1016/j.jpowsour.2005.03.134 |
[71] | Zhan R, Yang Z, Bloom I, et al. (2020) Significance of a Solid Electrolyte Interphase on Separation of Anode and Cathode Materials from Spent Li-Ion Batteries by Froth Flotation. ACS Sustainable Chem Eng 9: 531-540. doi: 10.1021/acssuschemeng.0c07965 |
[72] | Zhan R, Oldenburg Z, Pan L (2018) Recovery of active cathode materials from lithium-ion batteries using froth flotation. Sustainable Mater Technol 17: e00062. doi: 10.1016/j.susmat.2018.e00062 |
[73] | Nie H, Xu L, Song D, et al. (2015) LiCoO2: recycling from spent batteries and regeneration with solid state synthesis. Green Chemistr 17: 1276-1280. doi: 10.1039/C4GC01951B |
[74] | Xiao J, Li J, Xu Z (2017) Novel Approach for in Situ Recovery of Lithium Carbonate from Spent Lithium Ion Batteries Using Vacuum Metallurgy. Environ Sci Technol 51: 11960-11966. doi: 10.1021/acs.est.7b02561 |
[75] | Hanisch C, Loellhoeffel T, Diekmann J, et al. (2015) Recycling of lithium-ion batteries: a novel method to separate coating and foil of electrodes. J Cleaner Prod 108: 301-311. doi: 10.1016/j.jclepro.2015.08.026 |
[76] | Zhang G, He Y, Wang H, et al. (2020) Removal of Organics by Pyrolysis for Enhancing Liberation and Flotation Behavior of Electrode Materials Derived from Spent Lithium-Ion Batteries. ACS Sustainable Chem Eng 8: 2205-2214. doi: 10.1021/acssuschemeng.9b05896 |
[77] | Zhan R, Payne T, Leftwich T, et al. (2020) De-agglomeration of cathode composites for direct recycling of Li-ion batteries. Waste Manag 105: 39-48. doi: 10.1016/j.wasman.2020.01.035 |
[78] | Kuo CY, Lin HN, Tsai HA, et al. (2008) Fabrication of a high hydrophobic PVDF membrane via nonsolvent induced phase separation. Desalination 233: 40-47. doi: 10.1016/j.desal.2007.09.025 |
[79] | Zhang G, Du Z, He Y, et al. (2019) A Sustainable Process for the Recovery of Anode and Cathode Materials Derived from Spent Lithium-Ion Batteries. Sustainability 11: 2363. doi: 10.3390/su11082363 |
[80] | He Y, Zhang T, Wang F, et al. (2017) Recovery of LiCoO2 and graphite from spent lithium-ion batteries by Fenton reagent-assisted flotation. J Cleaner Prod 143: 319-325. doi: 10.1016/j.jclepro.2016.12.106 |
[81] | Holtstiege F, Wilken A, Winter M, et al. (2017) Running out of lithium? A route to differentiate between capacity losses and active lithium losses in lithium-ion batteries. Phys Chem Chem Phys 19: 25905-25918. doi: 10.1039/C7CP05405J |
[82] | Matsumura Y, Wang S, Mondori J (1995) Mechanism leading to irreversible capacity loss in Li ion rechargeable batteries. J Electrochem Soc 142: 2914-2918. doi: 10.1149/1.2048665 |
[83] | Sun Y, Lee HW, Seh ZW, et al. (2016) High-capacity battery cathode prelithiation to offset initial lithium loss. Nat Energy 1: 15008. doi: 10.1038/nenergy.2015.8 |
[84] | Zhou H, Xin F, Pei B, et al. (2019) What Limits the Capacity of Layered Oxide Cathodes in Lithium Batteries? ACS Energy Lett 4: 1902-1906. doi: 10.1021/acsenergylett.9b01236 |
[85] | Li T, Yuan XZ, Zhang L, et al. (2019) Degradation Mechanisms and Mitigation Strategies of Nickel-Rich NMC-Based Lithium-Ion Batteries. Electrochem Energy Rev 3: 43-80. doi: 10.1007/s41918-019-00053-3 |
[86] | Lou S, Shen B, Zuo P, et al. (2015) Electrochemical performance degeneration mechanism of LiCoO2 with high state of charge during long-term charge/discharge cycling. RSC Adv 5: 81235-81242. doi: 10.1039/C5RA13841H |
[87] | Zhao Y, Yuan X, Jiang L, et al. (2020) Regeneration and reutilization of cathode materials from spent lithium-ion batteries. Chem Eng J 383: 123089. doi: 10.1016/j.cej.2019.123089 |
[88] | Shi Y, Chen G, Chen Z (2018) Effective regeneration of LiCoO2 from spent lithium-ion batteries: a direct approach towards high-performance active particles. Green Chem 20: 851-862. doi: 10.1039/C7GC02831H |
[89] | Shi Y, Chen G, Liu F, et al. (2018) Resolving the Compositional and Structural Defects of Degraded LiNixCoyMnzO2 Particles to Directly Regenerate High-Performance Lithium-Ion Battery Cathodes. ACS Energy Lett 3: 1683-1692. doi: 10.1021/acsenergylett.8b00833 |
[90] | Meng X, Hao J, Cao H, et al. (2019) Recycling of LiNi1/3Co1/3Mn1/3O2 cathode materials from spent lithium-ion batteries using mechanochemical activation and solid-state sintering. Waste Manag 84: 54-63. doi: 10.1016/j.wasman.2018.11.034 |
[91] | Li X, Zhang J, Song D, et al. (2017) Direct regeneration of recycled cathode material mixture from scrapped LiFePO4 batteries. J Power Sources 345: 78-84. doi: 10.1016/j.jpowsour.2017.01.118 |
[92] | Shi Y, Zhang M, Meng YS, et al. (2019) Ambient-Pressure Relithiation of Degraded LixNi0.5Co0.2Mn0.3O2(0 < x < 1) via Eutectic Solutions for Direct Regeneration of Lithium-Ion Battery Cathodes. Adv Energy Mater 9: 1900454. doi: 10.1002/aenm.201900454 |
[93] | Wang H, Whitacre JF (2018) Direct Recycling of Aged LiMn2O4 Cathode Materials used in Aqueous Lithium-ion Batteries: Processes and Sensitivities. Energy Technol 6: 2429-2437. doi: 10.1002/ente.201800315 |
[94] | Antolini E (2004) LiCoO2: formation, structure, lithium and oxygen nonstoichiometry, electrochemical behaviour and transport properties. Solid State Ionics 170: 159-171. doi: 10.1016/j.ssi.2004.04.003 |
[95] | Dahn JR, Fuller EW, Obrovac M, et al. (1994) Thermal stability of LixCoO2, LixNiO2 and λ-MnO2 and consequences for the safety of Li-ion cells. Solid State Ionics 69: 265-270. doi: 10.1016/0167-2738(94)90415-4 |
[96] | Lundblad A, Bergman B (1997) Synthesis of LiCoO2 starting from carbonate precursors II. Influence of calcination conditions and leaching. Solid State Ionics 96: 183-193. doi: 10.1016/S0167-2738(97)00017-9 |
[97] | Chang ZR, Yu X, Tang HW, et al. (2011) Synthesis of LiNi1/3Co1/3Al1/3O2 cathode material with eutectic molten salt LiOH-LiNO3. Powder Technol 207: 396-400. doi: 10.1016/j.powtec.2010.11.025 |
[98] | Zhang Z, He W, Li G, et al. (2013) Renovation of LiCoO2 crystal structure from spent lithium ion batteries by ultrasonic hydrothermal reaction. Res Chem Intermed 41: 3367-3373. doi: 10.1007/s11164-013-1439-y |
[99] | Zhu S (2016) Renovation of Lithium Cobalt Oxide from Spent Lithium Ion Batteries by an Aqueous Pulsed Discharge Plasma. Int J Electrochem Sci 6403-6411. |
[100] | Gao H, Yan Q, Xu P, et al. (2020) Efficient Direct Recycling of Degraded LiMn2O4 Cathodes by One-Step Hydrothermal Relithiation. ACS Appl Mater Interfaces 12: 51546-51554. doi: 10.1021/acsami.0c15704 |
[101] | Wang T, Luo H, Bai Y, et al. (2020) Direct Recycling of Spent NCM Cathodes through Ionothermal Lithiation. Adv Energy Mater 10: 2001204. doi: 10.1002/aenm.202001204 |
[102] | Zhang L, Xu Z, He Z (2020) Electrochemical Relithiation for Direct Regeneration of LiCoO2 Materials from Spent Lithium-Ion Battery Electrodes. ACS Sustainable Chem Eng 8: 11596-11605. doi: 10.1021/acssuschemeng.0c02854 |
[103] | Matis WJL, Yonemoto BT, YIN Y, et al. (2019) Method for recycling and refreshing cathode material, refreshed cathode material and lithium ion battery. |
[104] | Argonne National Laboratory (2018) EverBatt. Available from: https://www.anl.gov/egs/everbatt. |
[105] | The National Renewable Energy Laboratory (2021) Battery Second-Use Repurposing Cost Calculator. Available from: https://www.nrel.gov/transportation/b2u-calculator.html. |