期刊
JOURNAL OF POWER SOURCES
卷 403, 期 -, 页码 38-48出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2018.09.062
关键词
Spent LiFePO4; Anode material; Electrochemical performance; Composites; Alkaline Ni-Fe secondary batteries
资金
- Funds of the Natural Science Foundation of China [51674105, 51604098]
- China Postdoctoral Science Foundation [2016T90665]
- Program for Science & Technology Innovation Talents in Universities of Henan Province [17HASTIT030]
- Program for Excellent Youth Foundation of Henan Province [184100510005]
- Program for Innovative Research Team in University of Henan Province [18IRTSTHN003]
In recent years, how to properly recycle increasing spent LiFePO4 batteries is becoming an extremely thorny subject, which is related to not only a severe environmental pollution but also a serious waste of valuable resources. Here, for the first time, a sustainable and smart approach is established for manufacturing LiFePO4/C/FeS composites from spent LiFePO4 powders as novel anode materials for alkaline Ni-Fe secondary battery. The LiFePO4/C/FeS composites are prepared via a facile ball milling method by using spent LiFePO4 and commercial FeS as raw materials. When serving as host anode material for Ni-Fe battery, the LiFePO4/C/FeS (40(wt)%) composite exhibits attractive anodic performance in alkaline solution, with a high specific discharge capacity of similar to 232.9 mAh g(-1) (639.1 mAh g(pe)(-1)) at 0.2C, prominent high-rate capabilities (similar to 150.7 mAh g(-1) (413.5 mAh g(Fe)(-1)) still retains even at a high rate up to 5C) and excellent cyclic stability (with retention of as high as 75.9% of its highest capacity after 300 cycles at 1C). Meaningfully, our study proposes a sustainable and economical approach to produce advanced anodes for alkaline Ni-Fe secondary batteries, simultaneously providing an attractive and facile way to recycle spent LiFePO4 materials in large scale.
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