PEO/PVDF-HFP/LLZTO Composite Solid Polymer Electrolyte for High-Performance All-Solid-State Lithium Metal Batteries

被引：10
作者：
Gan, Huihui [1 ]
Sun, Jiajun [1 ]
Xia, Ye [1 ]
Qiu, Pengyuan [1 ]
Li, Liang [1 ]
Zhu, Wen [1 ]
机构：
[1] Huazhong Univ Sci & Technol, Sch Mat Sci & Engn, State Key Lab Mat Proc & Die & Mould Technol, Wuhan 430074, Peoples R China
来源：
JOURNAL OF PHYSICAL CHEMISTRY C | 2023年 / 127卷 / 43期
关键词：
IONIC-CONDUCTIVITY; MECHANICAL STRENGTH; STABILITY;
D O I：
10.1021/acs.jpcc.3c06275
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 composite solid polymer electrolyte (CSPE) is the best candidate in all-solid-state lithium metal batteries because of its flexibility, high safety, wide electrochemical stability, relatively high ionic conductivity, and excellent compatibility with the lithium metal. In this work, the garnet-type Li6.75La3Zr1.75Ta0.25O12 (LLZTO) is introduced into a poly(ethylene oxide) (PEO)/poly(vinylidene fluoride-hexafluoropropylene) (PVDF-HFP)-based CSPE (PEO/PVDF-HFP/LLZTO CSPE). The PEO/PVDF-HFP/LLZTO CSPE possesses a high lithium-ion transference number of 0.47, a high ionic conductivity of 2.65 x 10(-4) S cm(-1), a wide electrochemical window of 5.55 V vs Li+/Li, and effective inhibition of lithium dendrite growth for 1000 h with a current density of 0.10 mA cm(-2). Furthermore, the Li//LiFePO4 cell assembled with the PEO/PVDF-HFP/LLZTO CSPE delivers superior rate capability and good cycling stability. Therefore, the PEO/PVDF-HFP/LLZTO CSPE is a very promising candidate for high-performance all-solid-state lithium metal batteries.
引用
收藏
页码：21015 / 21021
页数：7
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