Citation: TU Fang-Fang, XIE Jian, GUO Feng, ZHAO Xin-Bing, WANG Yu-Ping, CHEN Dong, XIANG Jia-Yuan, CHEN Jian. Preparation and Electrochemical Performance of Li_6.4La₃Zr_1.4Ta_0.6O₁₂/Polymer-Based Solid Composite Electrolyte[J]. Chinese Journal of Inorganic Chemistry, ;2020, 36(8): 1515-1523. doi: 10.11862/CJIC.2020.169 shu

Preparation and Electrochemical Performance of Li_6.4La₃Zr_1.4Ta_0.6O₁₂/Polymer-Based Solid Composite Electrolyte

1.
Zhejiang Narada Power Source Corporation Limited, Hangzhou 311100, China
2.
School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China

Corresponding author: TU Fang-Fang, fangfangtu1990@126.com
Received Date: 7 March 2020
Revised Date: 7 May 2020

Figures(4)

A solid composite electrolyte was prepared through a solution-casting method with polypropylene carbonate (PPC) and polyethylene oxide (PEO) as polymer blends, and Li_6.4La₃Zr_1.4Ta_0.6O₁₂(LLZTO) particles as multifunctional fillers. The effects of LLZTO content and PPC/PEO mass ratio on the ionic conductivity of solid composite electrolyte were studied. Results show that the ionic conductivity at room temperature reached the highest value of 1.14×10^-4 S·cm^-1 when LLZTO content was 30%(w/w) and the mass ratio of PPC to PEO was 1:1. The incorporation of LLZTO and PPC into PEO repressed the crystallinity of polymer electrolyte, increased ionic conductivity, electrochemical stability window (4.7 V) and Li+ transference number (0.25), and reinforces interfacial stability between solid electrolyte and lithium anode. The capacity retention rates of the LiFePO₄/Li cell with solid composite electrolyte remain 82% after 70 cycles at room temperature and 79% after 100 cycles at 60℃. The discharge capacity reaches 120.7 and 112.6 mAh·g^-1 at 0.5C and 1C, respectively.
- lithium secondary batteries,
- solid inorganic-organic hybrid electrolyte,
- Li_6.4La₃Zr_1.4Ta_0.6O₁₂,
- polypropylene carbonate,
- polymer blends
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通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

Preparation and Electrochemical Performance of Li6.4La3Zr1.4Ta0.6O12/Polymer-Based Solid Composite Electrolyte

南开大学师唯/华北电力大学（保定）刘景维：二维配位聚合物中有序的亲锂冠醚位点用于无枝晶锂沉积

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通讯作者: 陈斌, bchen63@163.com

Preparation and Electrochemical Performance of Li_6.4La₃Zr_1.4Ta_0.6O₁₂/Polymer-Based Solid Composite Electrolyte