期刊
ADVANCED ENERGY MATERIALS
卷 12, 期 2, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/aenm.202102348
关键词
all-solid-state batteries; sulfide solid electrolytes; superhydrophobic; water sensitivity
类别
资金
- Key Program-Automobile Joint Fund of National Natural Science Foundation of China [U1964205]
- Department of Science and Technology of Jiangsu Province [BE2020003]
- 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]
- Science and Technology Research Institute of China Three Gorges Corporation [202103402]
- Talent Program of Chinese Academy of Sciences, Scientist Studio Program Funding from Yangtze River Delta Physics Research Center
- Tianmu Lake Institute of Advanced Energy Storage Technologies [TIES-SS0001]
A universal method was developed to create water-stable sulfide solid electrolyte membranes through spray coating a Li+-conductive superhydrophobic protection layer, which demonstrates excellent superhydrophobicity and maintains high electrochemical performance even under extreme water exposure conditions.
Sulfide solid electrolytes (SEs) represent one most promising technical routes to realize all-solid-state batteries (ASSBs) due to their high ionic conductivity and low mechanical stiffness. However, the poor air/moisture/water stability of sulfide SEs leads to completely destroyed structure/composition, reduced Li+ conductivity, and toxic H2S release, limiting their practical application in ASSBs. To solve this problem, a universal method applicable to all types of sulfide SEs is developed to realize water-stable sulfide SE membranes, by spray coating a Li+-conductive superhydrophobic protection layer with Li1.4Al0.4Ti1.6(PO4)(3) (LATP) nanoparticles and fluorinated polysiloxane (F-POS) via hydrolysis and condensation of tetraethyl orthosilicate and 1H,1H,2H,2H-perfluorodecyltriethoxysilane molecules. The F-POS@LATP coating layer exhibits excellent superhydrophobicity (water static contact angles > 160 degrees) to resist extreme exposure (direct water jetting), because of its micro-/nanoscale roughness and low surface energy. Moreover, ASSBs using the extreme-condition-exposed modified Li6PS5Cl membrane exhibit a reversible capacity of 147.3 mAh g(-1), comparable with the ASSBs using pristine sulfide membranes. The superhydrophobic Li+-conducting layer is demonstrated to be an effective protection method for sulfide membranes so that they remain stable and functionable in extreme water exposure conditions, providing a new approach to protect all types of sulfide SEs and other air/moisture/water-sensitive materials without sacrificing electrochemical performance.
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