All-solid-state interpenetrating network polymer electrolytes for long cycle life of lithium metal batteries

被引：51

作者：

Tong, Yongfen ^{[1
,2
]}

Lyu, Hailong ^{[2
]}

Xu, Yuzhong ^{[1
]}

Thapaliya, Bishnu Prasad ^{[2
,3
]}

Li, Peipei ^{[2
]}

Sun, Xiao-Guang ^{[2
]}

Dai, Sheng ^{[2
,3
]}

机构：

[1] Nanchang Hangkong Univ, Sch Environm & Chem Engn, 696 Fenghe South Ave, Nanchang 330063, Jiangxi, Peoples R China

[2] Oak Ridge Natl Lab, Chem Sci Div, Oak Ridge, TN 37831 USA

[3] Univ Tennessee, Dept Chem, Knoxville, TN 37996 USA

来源：

JOURNAL OF MATERIALS CHEMISTRY A | 2018年 / 6卷 / 30期

关键词：

SINGLE-ION CONDUCTORS; BLOCK-COPOLYMER ELECTROLYTES; BRANCHED POLYEPOXIDE ETHERS; TRANSFERENCE NUMBERS; DIELECTRIC-CONSTANT; SEGMENTAL DYNAMICS; ROOM-TEMPERATURE; MOLECULAR-WEIGHT; CONDUCTIVITY; GLYCOL;

D O I：

10.1039/c8ta03062f

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A star-shape polymer of 3-armed poly(ethylene glycol) methyl ether methacrylate-co-glycidyl methacrylate copolymer (3PPEGM-co-GMA) was synthesized using an atom transfer radical polymerization (ATRP) technique. All-solid-state interpenetrating network polymer electrolytes (INSPEs) were fabricated by simultaneous reaction of 3PPEGM-co-GMA and bisphenol A diglycidyl ether (BPDE) with polyetherdiamine (ED2003) in the presence of lithium bis(trifluoromethane) sulfonamide (LiTFSI). The INSPEs exhibited ionic conductivities higher than 10(-5 )S cm(-1) at room temperature, a high oxidation stability of 4.5 vs. Li/Li+ and remarkable stability towards lithium metal. Li metal batteries with LiFePO4 as the cathode and INSPEs as the electrolyte cycled at a current rate of 0.1C at 60 degrees C showed a high initial discharge capacity of 156.2 mA h g(-1) and a stable cycling performance over 200 cycles with a high coulombic efficiency of 99%. The results demonstrate that the interpenetrating network polymer electrolytes are promising electrolytes for next generation lithium-based batteries with high ionic conductivity, improved safety, and stable electrochemical performance.

引用

页码：14847 / 14855

页数：9

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