期刊
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
卷 7, 期 19, 页码 15896-15903出版社
AMER CHEMICAL SOC
DOI: 10.1021/acssuschemeng.9b01869
关键词
Asymmetrical structure; LATP; Composite electrolyte; All-solid-state battery; Excellent performance
资金
- National Key Research and Development Program of China: Tackling Key Technologies for Development and Industrialization of Power Lithium Ion Battery with High Specific Energy [2016YFB0100506]
- General Financial Grant from the China Postdoctoral Science Foundation [2017M622297]
Solid state electrolytes have stimulated research interest due to their promising application in lithium batteries with high safety. In this paper, an asymmetrical structure composite solid electrolyte consisting of Li1.3Al0.3Ti1.7(PO4)(3) (LATP), poly(vinylidene fluoride-hexafluoropropylene) (P(VDF-HFP)), succinonitrile (SN), and a polyimide (PI) film (named ACSE-PI) was fabricated successfully. This solid electrolyte is flexible and can be stable at a high temperature of 150 degrees C. Moreover, it exhibits a wide electrochemical window of 5 V and high ionic conductivity of over 10(-4) S cm(-1). An all-solid-state battery assembled with this electrolyte exhibits excellent performance at ambient temperature. In particular, the specific discharge capacity of LiFePO4/ACSE-PI/Li battery is 168.4, 164.4, 154.9, 143.4, 129.5, and 109.4 mAh g(-1) at a rate of 0.1, 0.2, 0.5, 1, 2, and 5 C, respectively. It also delivers a reversible discharge capacity of 156 mAh g(-1) after 200 cycles at 0.2 C. Notably, the battery can also operate at 4 degrees C, and the discharge capacity is higher than 110 mAh g(-1) after 200 cycles at 0.2 C. Considering the good performances mentioned above, the ACSE-PI electrolyte is appropriate for the practical application of a solid-state Li-ion battery with higher safety.
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