期刊
ADVANCED MATERIALS
卷 34, 期 34, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.202203281
关键词
all-solid-state batteries; composite solid electrolytes; lithium-metal anodes; solid electrolyte interphase; sulfides
类别
资金
- Key R&D Project - Department of Science and Technology of Jiangsu Province [BE2020003]
- Key Program-Automobile Joint Fund of National Natural Science Foundation of China [U1964205]
- General Program of National Natural Science Foundation of China [51972334]
- General Program of National Natural Science Foundation of Beijing [2202058]
- Cultivation project of leading innovative experts in Changzhou City [CQ20210003]
- National Overseas High-level Expert recruitment Program [E1JF021E11]
- Talent Program of Chinese Academy of Sciences, Scientist Studio Program Funding from Yangtze River Delta Physics Research Center and Tianmu Lake Institute of Advanced Energy Storage Technologies [TIES-SS0001]
- Science and Technology Research Institute of China Three Gorges Corporation [202103402]
This study constructs an ultrastable and kinetically favorable interface between sulfide-poly(ethylene oxide) composite solid electrolytes (CSEs) and lithium metal through in situ formation of a solid electrolyte interphase (SEI) layer containing Li3PS4. A specially designed sulfide, lithium polysulfidophosphate (LPS), can distribute uniformly in the PEO matrix, creating a homogeneous SEI layer. The CSE/Li interface with high Li+ transportation capability is quickly stabilized through the reaction between LPS and lithium metal to inhibit lithium dendrite growth.
An ultrastable and kinetically favorable interface is constructed between sulfide-poly(ethylene oxide) (PEO) composite solid electrolytes (CSEs) and lithium metal, via in situ formation of a solid electrolyte interphase (SEI) layer containing Li3PS4. A specially designed sulfide, lithium polysulfidophosphate (LPS), can distribute uniformly in the PEO matrix via a simple stirring process because of its complete solubility in acetonitrile solvent, which is advantageous for creating a homogeneous SEI layer. The CSE/Li interface with high Li+ transportation capability is stabilized quickly through in situ formation of a Li3PS4/Li2S/LiF layer via the reaction between LPS and lithium metal to inhibit lithium dendrite growth. A Li/Li symmetric cell with the LPS-integrated CSE exhibits constant and small CSE/Li resistance of 10 omega cm(2) during cycling, delivering stable cycling for 3475 h at a current density of 0.2 mA cm(-2) and a high critical current density of 0.9 mA cm(-2) at 60 degrees C. Impressive electrochemical performance is also demonstrated for LiFePO4/CSE/Li all-solid-state batteries with capacity of 127.6 mAh g(-1) after 1000 cycles at 1 C.
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