Details

Autor(en) / Beteiligte

• Chen, Jiangping
• Li, Qingwen
• Song, Jishun
• Song, Dawei
• Zhang, Lianqi
• Shi, Xianxing

Titel

Environmentally friendly recycling and effective repairing of cathode powders from spent LiFePO4 batteriesElectronic supplementary information (ESI) available: Tap densities, SEM, XRD. See DOI: 10.1039/c5gc02650d

Erscheinungsjahr

2016-04

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Extensive use of LiFePO 4 batteries will afford a lot of spent LiFePO 4 batteries, which cannot be recycled properly by using traditional processes at present. If these spent LiFePO 4 batteries are thrown away without recycling properly, it is not only a severe waste of valuable resources, but also leads to serious environmental pollution. In this paper, a completely green recycling process and a small scale model line are developed to recycle cathode powders from spent LiFePO 4 batteries for the first time. Parts of LiFePO 4 host particles in spent LiFePO 4 batteries decompose to FePO 4 , Fe 2 O 3 , P 2 O 5 and Li 3 PO 4 after numerous charge-discharge cycles, resulting in poor electrochemical performance of freshly recycled cathode powders for Li-ion batteries. To repair decomposed LiFePO 4 host particles, recycled cathode powders are heat-treated at different temperatures. After heat-treatment at high temperatures, especially at 650 °C, cathode powders are effectively recycled and can be reused for Li-ion batteries. Extensive use of LiFePO 4 batteries will afford a lot of spent LiFePO 4 batteries, which cannot be recycled properly by using traditional processes at present.