Hybridizing poly(vinylidene fluoride-co-hexafluoropropylene) with Li6.5La3Zr1.5Ta0.5O12 as a lithium-ion electrolyte for solid state lithium metal batteries

被引：133

作者：

Lu, Juan ^{[1
]}

Liu, Yanchen ^{[1
]}

Yao, Penghui ^{[1
]}

Ding, Zhiyu ^{[1
]}

Tang, Qiming ^{[1
]}

Wu, Junwei ^{[1
]}

Ye, Ziran ^{[2
]}

Huang, Kevin ^{[3
]}

Liu, Xingjun ^{[1
]}

机构：

[1] Harbin Inst Technol Shenzhen, Dept Mat Sci & Engn, Shenzhen Key Lab Adv Mat, Shenzhen 518055, Peoples R China

[2] Zhejiang Univ Technol, Dept Appl Phys, Hangzhou 310014, Zhejiang, Peoples R China

[3] Univ South Carolina, Dept Mech Engn, Columbia, SC 29208 USA

来源：

CHEMICAL ENGINEERING JOURNAL | 2019年 / 367卷

关键词：

Solid electrolyte; Polymer; Ceramic; Ionic conductivity; Capacity; GEL POLYMER ELECTROLYTE; PVDF-HFP; ELECTROCHEMICAL PERFORMANCE; CONDUCTIVITY ENHANCEMENT; ENERGY-STORAGE; LI7LA3ZR2O12; FLUORIDE-HEXAFLUOROPROPYLENE); MEMBRANE; FILLERS; SAFE;

D O I：

10.1016/j.cej.2019.02.148

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Polymer/ceramic composite solid electrolyte is an appealing solution for the exploitation of flexible solid-state lithium-metal batteries. Here we report a solid-state Li-ion electrolyte composing of poly(vinylidene fluoride-cohexafluoro propylene) (PVDF-HFP) polymer, ceramic powder Li6.5La3Zr1.5Ta0.5O12 (LLZTO) and lithium salt LiTFSI. The composite electrolyte exhibits a high ionic conductivity of 8.80 x 10(-5) S.cm(-1) at room temperature. A coin battery with LiFePO4 cathode is cycled under 0.5 C at room temperature for long cycles, achieving a Coulombic efficiency of 99.6% without virtually capacity loss (1st: 101.4 mAh.g(-1) and 500th: 110.9 mAh.g(-1)). Such excellent performance can be ascribed to the formation of high ionic conductivity by LLZTO active garnet reducing polymer crystallinity. These results show that the developed polymer/ceramic composite has potential to be a high-performance electrolyte for solid-state lithium-metal batteries.

引用

页码：230 / 238

页数：9

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