期刊
ADVANCED ENERGY MATERIALS
卷 12, 期 39, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/aenm.202201762
关键词
catalytic polymerization; composite solid electrolytes; interfaces; ionic conductivity; solid-state battery
类别
资金
- National Natural Science Foundation of China [51474113, U21A20170]
This study reports a highly homogeneous poly(1,3-dioxolane) composite solid electrolyte membrane with good ionic conductivity. The in situ catalytic polymerization effect of yttria stabilized zirconia nanoparticles on the polymerization of 1,3-dioxolane is achieved. The membrane has a large electrochemical window and good ionic conductivity, which benefits the cycle life of solid-state lithium batteries.
High energy density solid-state lithium batteries require good ionic conductive solid electrolytes (SE) and stable matching with high-voltage electrode materials. Here, a highly homogeneous poly(1,3-dioxolane) composite solid electrolyte (CSE) membrane that can satisfy the above-mentioned requirements by in situ catalytic polymerization effect of yttria stabilized zirconia (YSZ) nanoparticles on the polymerization of 1,3-dioxolane (DOL), is reported. The well-dispersed YSZ nanoparticle catalyst leads to the polymerization conversion of DOL monomers up to 98.5%, which enlarges its electrochemical window exceeding 4.9 V. YSZ also significantly improves the room temperature ionic conductivity (2.75 x 10(-4) S cm(-1)) and enhances the cycle life of lithium metal anode. Based on this CSE, the Li(Ni0.6Co0.2Mn0.2)O-2 (NCM622)-based solid-state lithium battery shows a long cycle life over 800 cycles. This investigation encourages polymer SE toward practical high energy solid-state batteries.
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