原位耦合构建界面桥提高全固态锂金属电池的电化学稳定性

IF 3.784 3区 化学 Q1 Chemistry
Qianwei Zhang , Rong Yang , Chao Li , Lei Mao , Bohai Wang , Meng Luo , Yinglin Yan , Yiming Zou , Lisheng Zhong , Yunhua Xu
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引用次数: 0

摘要

由三维Li6.4La3Zr2Al0.2O12 (3D-LLZAO)组成的聚合物基复合电解质由于其连续离子传导和令人满意的力学性能而越来越受到人们的关注。然而,有机/无机界面不相容,导致锂离子在界面处传输缓慢。因此,有机/无机界面的相容性是一个亟待解决的问题。受“壁虎屋檐”概念的启发,设计了具有致密界面结构的聚合物基复合固体电解质。通过在PEO-3D-LLZAO (PL)电解质中引入硅烷偶联剂(3-氯丙基)三甲氧基硅烷(CTMS),建立了有机/无机界面的桥接。原位偶联反应提高了界面亲合力,增强了有机/无机相互作用,降低了界面阻力,从而实现了高效的界面离子传输网络。制备的peoo - 3d - llzao - ctms (PLC)电解质在60℃时离子电导率达到6.04 × 10−4 S cm−1,离子迁移数达到0.61,电化学窗口扩大5.1 V,同时具有良好的热稳定性和较高的力学性能。此外,LiFePO4|PLC|锂电池具有优异的倍率性能和循环稳定性,在60°C和0.1 C下循环100次后容量衰减率为2.2%。PLC膜的这些优点表明这种设计方法确实是实用的,原位耦合方法为解决接口兼容性问题提供了一种新的途径。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

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

Polymer-based composite electrolytes composed of three-dimensional Li6.4La3Zr2Al0.2O12 (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 transport 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 transport 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 °C 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 °C and 0.1 C. These advantages of PLC membranes indicate that this design approach is indeed practical, and the in-situ coupling method provides a new approach to address interface compatibility issues.

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来源期刊
ACS Combinatorial Science
ACS Combinatorial Science CHEMISTRY, APPLIED-CHEMISTRY, MEDICINAL
自引率
0.00%
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0
审稿时长
1 months
期刊介绍: The Journal of Combinatorial Chemistry has been relaunched as ACS Combinatorial Science under the leadership of new Editor-in-Chief M.G. Finn of The Scripps Research Institute. The journal features an expanded scope and will build upon the legacy of the Journal of Combinatorial Chemistry, a highly cited leader in the field.
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