期刊
ENERGY STORAGE MATERIALS
卷 24, 期 -, 页码 147-152出版社
ELSEVIER
DOI: 10.1016/j.ensm.2019.08.025
关键词
Lithium-ion batteries; Prelithiation; Initial coulombic efficiency; Phosphorous; Sulfur
资金
- Fundamental Research Funds for the Central Universities [2042019kf0018, WUT: 2015-IB-001]
- Double-First Class Construction Funds
- Office of Vehicle Technologies, under the Vehicle Technology Program [DE-SC0012704]
Controlled chemical prelithiation of high capacity phosphorous/carbon (P/C) composite anode has been applied to develop advanced lithium-ion batteries (LIBs). The initial coulombic efficiency (CE) of P/C is significantly improved (up to 93% for fully-prelithiated P/C) owing to the formation of an artificial solid electrolyte interface (SEI) layer, which is characterized by SEM, Raman and XPS analyses. It ensures the application of P/C anode in real battery assembly. A partly-prelithiated P/C anode prepared by 20 s prelithiation treatment is paired with a LiCoO2 (LCO) cathode. The full cell delivers a highly reversible capacity of similar to 104 mAh g(LCO)(-1) at 1C rate and retains a CE close to 100% over 2000 cycles. Moreover, a fully-prelithiated P/C anode prepared by 10 min prelithiation treatment is paired with a high-capacity Li-free sulfur/carbon (S/C) cathode. This newly configured full cell delivers a good rate and cycling performance and a high energy density of 358 Wh kg(-1).
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