Electric potential-determined redox intermediates for effective recycling of spent lithium-ion batteries

Hua, Yunhui1,2; Xu, Zhenghe3; Zhao, Baojun2,4; Zhang, Zuotai1

2022-03-01

10.1039/d2gc00331g

GREEN CHEMISTRY   影响因子和分区

1463-9262

1463-9270

Recycling of spent lithium-ion batteries (LIBs) by hydrometallurgy faces a major problem of consuming an excessive amount of acid and requiring different redox additives for effective metal leaching. Reducing chemical consumption in the recycling process is highly desirable for the environmentally friendly and sustainable development of renewable energy. In this study, an electrochemical approach for analyzing electric potentials was developed to evaluate redox abilities. Based on the results, a salt leaching method was proposed using water-soluble NH4Fe(SO4)(2) as a redox intermediate for synergistic recovery of valuable metals from spent ternary lithium-ion batteries (NCM) and LiFePO4 batteries (LFP). More than 97% of the Li, Mn, Co and Ni from the mixed cathode can be leached under mild conditions (50 degrees C, 30 min), with PO43- being completely retained in residues. The first-step reaction between Fe3+ and LFP to release Fe2+ proceeded rapidly, whereas the following slower reaction between Fe2+ and NCM was the rate-controlling process. Thermodynamic analysis of leaching solutions was carried out systematically and shown to be feasible for designing a precipitate recovery process for both LFP and NCM battery systems, with the recovered products being used for regenerating new materials. The synergistic salt-leaching treatment of spent LFP and NCM batteries based on electrochemical principles helped achieve high efficiency and high selectivity with a great benefit to preserving the environment.

SCI ; EI

英语

第一 ; 通讯

Shenzhen Peacock Plan[KQTD20160226195840229] ; Shenzhen Science and Technology Innovation Committee["JCYJ20200109141437586","JCYJ20200109141642225","JCYJ20200109141227141"]

Chemistry ; Science & Technology - Other Topics

Chemistry, Multidisciplinary ; Green & Sustainable Science & Technology

WOS:000782247500001

ROYAL SOC CHEMISTRY

20221912069935

Additives ; Electric potential ; Electronic Waste ; Ions ; Lithium compounds ; Lithium-ion batteries ; Metal recovery ; Product design ; Recycling ; Sustainable development ; Thermoanalysis

Municipal and Industrial Wastes; Waste Treatment and Disposal:452 ; Industrial Wastes:452.3 ; Electricity: Basic Concepts and Phenomena:701.1 ; Chemistry:801 ; Chemical Agents and Basic Industrial Chemicals:803 ; Production Engineering:913.1

CHEMISTRY

Web of Science

1.Southern Univ Sci & Technol SUSTech, Sch Environm Sci & Engn, Shenzhen 518055, Peoples R China
2.Univ Queensland, Sch Chem Engn, Brisbane, Qld 4072, Australia
3.Southern Univ Sci & Technol SUSTech, Dept Mat Sci & Engn, Shenzhen 518055, Peoples R China
4.Jiangxi Univ Sci & Technol, Fac Mat Met & Chem, Ganzhou 341000, Peoples R China

Hua, Yunhui,Xu, Zhenghe,Zhao, Baojun,et al. Electric potential-determined redox intermediates for effective recycling of spent lithium-ion batteries[J]. GREEN CHEMISTRY,2022.

Hua, Yunhui,Xu, Zhenghe,Zhao, Baojun,&Zhang, Zuotai.(2022).Electric potential-determined redox intermediates for effective recycling of spent lithium-ion batteries.GREEN CHEMISTRY.

Hua, Yunhui,et al."Electric potential-determined redox intermediates for effective recycling of spent lithium-ion batteries".GREEN CHEMISTRY (2022).