Concurrent recycling chemistry for cathode/anode in spent graphite/LiFePO4 batteries:Designing a unique cation/anion-co-workable dual-ion battery

• 作者: Yun-Feng Meng Hao-Jie Liang Chen-De Zhao Wen-Hao Li Zhen-Yi Gu Meng-Xuan Yu Bo Zhao Xian-Kun Hou Xing-Long Wu
• 来源期刊: 能源化学
• 年，卷（期）: 2022,（1）
• 页码范围: 166-171
• 页数: 6页
• 语种: 英文

摘要

With the increasing popularity of new energy electric vehicles,the demand for lithium-ion batteries(LIBs) has been growing rapidly,which will produce a large number of spent LIBs.Therefore,recycling of spent LIBs has become an urgent task to be solved,otherwise it will inevitably lead to serious environ-mental pollution.Herein,a unique recycling strategy is proposed to achieve the concurrent reuse of cath-ode and anode in the spent graphite/LiFePO4 batteries.Along with such recycling process,a unique cathode composed of recycled LFP/graphite (RLFPG) with cation/anion-co-storage ability is designed for new-type dual-ion battery (DIB).As a result,the recycle-derived DIB of Li/RLFPG is established with good electrochemical performance,such as an initial discharge capacity of 117.4 mA h g-1 at 25 mA g-1 and 78％ capacity retention after 1000 cycles at 100 mA g-1.The working mechanism of Li/RLFPG;DIB is also revealed via in situ X-ray diffraction and electrode kinetics studies.This work not only presents a far-reaching significance for large-scale recycling of spent LIBs in the future,but also proposed a sustainable and economical method to design new-type secondary batteries as recycling of spent LIBs.