首页|In-situ coupling construction of interface bridge to enhance electrochemical stability of all solid-state lithium metal batteries

In-situ coupling construction of interface bridge to enhance electrochemical stability of all solid-state lithium metal batteries

扫码查看
原文链接
  • NETL
  • NSTL
  • 万方数据
Polymer-based composite electrolytes composed of three-dimensional Li6.4La3Zr2AI0.2O12(3D-LLZAO)have attracted increasing attention due to their continuous ion conduction and satisfactory mechanical properties.However,the organic/inorganic interface is incompatible,resulting in slow lithium-ion trans-port at the interface.Therefore,the compatibility of organic/inorganic interface is an urgent problem to be solved.Inspired by the concept of"gecko eaves",polymer-based composite solid electrolytes with dense interface structures were designed.The bridging of organic/inorganic interfaces was established by introducing silane coupling agent(3-chloropropyl)trimethoxysilane(CTMS)into the PEO-3D-LLZAO(PL)electrolyte.The in-situ coupling reaction improves the interface affinity,strengthens the organic/inorganic interaction,reduces the interface resistance,and thus achieves an efficient interface ion trans-port network.The prepared PEO-3D-LLZAO-CTMS(PLC)electrolyte exhibits enhanced ionic conductivity of 6.04 × 10-4 S cm-1 and high ion migration number(0.61)at 60 ℃ and broadens the electrochemical window(5.1 V).At the same time,the PLC electrolyte has good thermal stability and high mechanical properties.Moreover,the LiFePO4|PLC|Li battery has excellent rate performance and cycling stability with a capacity decay rate of 2.2％after 100 cycles at 60 ℃ and 0.1 C.These advantages of PLC membranes indi-cate that this design approach is indeed practical,and the in-situ coupling method provides a new approach to address interface compatibility issues.

Organic/inorganic interphaseCoupling effectComposite electrolyteInterface compatibility

Qianwei Zhang、Rong Yang、Chao Li、Lei Mao、Bohai Wang、Meng Luo、Yinglin Yan、Yiming Zou、Lisheng Zhong、Yunhua Xu

展开 >

International Research Center for Composite and Intelligent Manufacturing Technology,Institute of Chemical Power Sources,Xi'an University of Technology,Xi'an 710048,Shaanxi,China

School of Materials Science and Engineering,Xi'an University of Technology,Xi'an 710048,Shaanxi,China

School of Electrical Engineering,Xi'an University of Technology,Xi'an 710048,Shaanxi,China

Yulin University,Yulin 719000,Shaanxi,China

展开 >

Key Program funded by the National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNatural Science Basic Research Program of ShaanxiRegional Innovation Capability Guidance Program of ShaanxiKey R&D Program of Xianyang Science and Technology BureauProgram of Xi'an Science and Technology Bureau

U20A2023552171127519742422023-JC-QN-05952022QFY10-062021ZDYF-GY-002923GXFW0066

2024

10.1016/j.jechem.2023.10.025

能源化学
中国科学院大连化学物理研究所 中国科学院成都有机化学研究所

能源化学

CSTPCDEI
影响因子：0.654
ISSN：2095-4956
年,卷(期)：2024.89(2)
  • 70