Fast-charging batteries based on dual-halogen solid-state electrolytes†

IF 6 2区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Materials Chemistry Frontiers Pub Date : 2023-08-10 DOI:10.1039/D3QM00491K

Hongtu Zhang, Xiaomeng Shi, Zhichao Zeng, Yabin Zhang and Yaping Du

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Abstract

Developing fast-charging technology is inevitable for the widespread adoption of electric vehicles. Therefore, high-performance all-solid-state batteries (ASSBs) assembled with stable electrodes and solid-state electrolytes (SSEs) with superior ionic conductivity are in demand. Herein, we develop dual-halogen SSEs Li₃YCl_6−xI_x that increase the ionic conductivity of trigonal Li₃YCl₆ (LYC) by more than one order of magnitude. Structural distortions and perturbative local structures of Li⁺ and Y³⁺ were studied, which confirmed the successful introduction of I⁻ ions. Li₄Ti₅O₁₂ (LTO) was chosen as the cathode material for ASSBs, and the batteries showed great stability after 1000 cycles at a high charge–discharge rate of 4.0C, with the initial capacity retained at 80%, suggesting promising applications as fast-charging ASSBs.

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基于双卤素固态电解质的快速充电电池†

发展快速充电技术是电动汽车广泛采用的必然。因此，需要用稳定的电极和具有优异离子导电性的固态电解质组装的高性能全固态电池（ASSB）。在此，我们开发了双卤素SSEs Li3YCl6−xIx，它将三角Li3YCl 6（LYC）的离子电导率提高了一个数量级以上。研究了Li+和Y3+的结构畸变和微扰局域结构，证实了I离子的成功引入。选择Li4Ti5O12（LTO）作为ASSB的阴极材料，在4.0C的高充放电速率下，电池在1000次循环后表现出良好的稳定性，初始容量保持在80%，表明其作为快速充电ASSB具有很好的应用前景。

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来源期刊

Materials Chemistry Frontiers Materials Science-Materials Chemistry

CiteScore

12.00

自引率

2.90%

发文量

313

期刊介绍： Materials Chemistry Frontiers focuses on the synthesis and chemistry of exciting new materials, and the development of improved fabrication techniques. Characterisation and fundamental studies that are of broad appeal are also welcome. This is the ideal home for studies of a significant nature that further the development of organic, inorganic, composite and nano-materials.