文献类型：期刊文献

英文题名：Rearrangement of Ion Transport Path on Nano-Cross-linker for All-Solid-State Electrolyte with High Room Temperature Ionic Conductivity

作者：Cai, Xiaomin[1];Ding, Jianlong[1];Chi, Ziyun[1];Wang, Wenqiang[1];Wang, Dongya[1];Wang, Gengchao[1]

机构：[1]East China Univ Sci & Technol, Shanghai Engn Res Ctr Hierarch Nanomat, Sch Mat Sci & Engn, Shanghai Key Lab Adv Polymer Mat, Shanghai 200237, Peoples R China

年份：2021

卷号：15

期号：12

起止页码：20489

外文期刊名：ACS NANO

收录：;EI(收录号：20215211393347);WOS:【SCI-EXPANDED(收录号:WOS:000732439400001)】；

基金：We greatly appreciate the financial support of National Natural Science Foundation of China (Grants 21875065 and 51673064) .

语种：英文

外文关键词：all-solid-state electrolyte; polyethylene oxide; nanosilica; rapid ion migration; lithium-sulfur batteries

摘要：The low room temperature ionic conductivity (RT sigma) of polyethylene oxide (PEO)-based solid-state polymer electrolyte (SPE) severely restricts its application for lithium batteries. Herein, acrylamide (AM) has been introduced into the poly(ethylene glycol) methyl ether methacrylate-poly(ethylene glycol) diacrylate (P-P). The multiple hydrogen bonds of AM expand the original single lithium environment (Li center dot center dot center dot O-C) to three types (Li center dot center dot center dot O-C, and Li center dot center dot center dot O=C), which accelerates the conduction of lithium ions. In addition, the double bond modification of nanosilica (=SiO2) not only improves the mechanical properties but also brings a high-speed orderly vehicular transport mechanism. The multiple-lithium-ions environment is rearranged on the surface of the =SiO2 to play a more significant role, making the RT sigma of SPE reach 2.6 X 10(-4) S cm(-1), and the Li-ion transfer number reaches 0.84. The results show that the assembled all-solid-state lithium-sulfur battery has a high initial discharge capacity of 707 mAh g(-1) at 30 degrees C when the sulfur loading is 4.3 mg cm(-2), good cycle stability (capacity retention rate of 89% after 100 cycles at 0.1 C), and excellent rate performance. This SPE with high RT sigma, stable interface engineering, and broad potential window (5.1 V) is expected to be used in other lithium/lithium-ion batteries that require high-voltage tolerance.