期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 10, 期 37, 页码 19641-19648出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d2ta02229j
关键词
-
资金
- National Natural Science Foundation of China [22075042]
- Shanghai Rising-Star Program [22QA1400300]
- Natural Science Foundation of Shanghai [20ZR1401400]
- Fundamental Research Funds for the Central Universities
- DHU Distinguished Young Professor Program [LZB2021002]
The study constructed a topochemistry-driven polyether-based composite electrolyte with a chemically stable interface and strong-coupled ionic conductivity, successfully improved the ion conduction performance, and achieved excellent cyclability and capacity retention through the reaction products of the solid electrolyte interface.
Polyether-based composite electrolytes exhibit great promise to bridge the gap between solid polymer electrolytes (SPEs) and high-energy solid-state Li metal batteries. However, the practical application of polyether electrolytes is still hindered by their poor ionic conductivity and low oxidation potential. Herein, a topochemistry-driven polyether-based composite electrolyte is constructed in situ, by the cation polymerization of 1,3-dioxolane (DOL) to obtain poly(1,3-dioxolane) (PDOL) in a three-dimensional (3D) La0.56Li0.33TiO3 nanofiber (LLTO NF) skeleton, with a chemically stable interface and strong-coupled ionic conductivity. The spontaneous polymerization reaction results in the formation of a unique polymeric CH2-CH2-O-CH2-O- amorphous structure of PDOL, with a wide operation voltage (5.5 V) and an intimate interface within the LLTO NF skeleton. The continuous one-dimensional (1D) LLTO NFs and polymer chains act as bi-phase ion transport channels, enabling an improved conduction of 6.6 x 10(-4) S cm(-1). Furthermore, the LiF and Al-complex films derived from the solid electrolyte interphase (SEI) can redistribute the ion flux and ensure the structural stability of the Li anode. Thus, the polyether-based composite electrolyte achieves a remarkable cyclability (over 900 h at 0.1 mA cm(-2)) and satisfactory capacity retention (70.7% over 350 cycles). This polymer composite electrolyte design offers a unique perspective for linking in situ topochemistry design with safe and high-energy solid batteries.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据