Nanoporous ZnGa2O4-modified separator as a multifunctional polysulphide barrier for advanced lithium-sulfur batteries

IF 4.2 3区工程技术 Q2 ELECTROCHEMISTRY

Electrochemistry Communications Pub Date : 2025-06-28 DOI:10.1016/j.elecom.2025.107990

Zifan Wang, Wensi Li, Tianzhen Wang, Mingyuan Pang, Zhen Kong, Juan An, Zhen Li, Jiajia Ye, Guang Xia

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Abstract

Nanoporous ZnGa₂O₄ was synthesised as a separator modifier for lithium‑sulfur batteries via a one-step sol-gel process followed by high-temperature calcination. The modified separator could effectively adsorb and catalyse lithium polysulphides, thus inhibiting the shuttle effect and improving their redox kinetics. The three-dimensional porous structure of ZnGa₂O₄ with high surface area that can effectively relieve the volume expansion of S₈ during cycling process and provide transport channels for both electrons and Li⁺ ion. Consequently, the battery with the ZnGa₂O₄ interlayer exhibited excellent reversibility and stability, with a reversible capacity of 723.4 mAh·g⁻¹ after 300 cycles at 1C. Furthermore, LiS cells with modified separators demonstrated enhanced rate capability (704.3 mAh g⁻¹ at 5C) compared with commercial separators.

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纳米多孔znga2o4改性隔膜作为先进锂硫电池的多功能多硫化物屏障

采用溶胶-凝胶-高温煅烧一步法制备了纳米多孔ZnGa2O4作为锂硫电池的隔膜改性剂。改性后的隔膜能有效吸附和催化多硫化物锂，从而抑制了穿梭效应，提高了多硫化物锂的氧化还原动力学。ZnGa2O4具有高表面积的三维多孔结构，可以有效缓解S8在循环过程中的体积膨胀，同时为电子和Li+离子提供输运通道。因此，ZnGa2O4夹层电池表现出优异的可逆性和稳定性，在1C下循环300次后，电池的可逆容量为723.4 mAh·g−1。此外，与商用隔膜相比，使用改性隔膜的锂离子电池表现出更高的倍率能力（5C时为704.3 mAh g−1）。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Electrochemistry Communications 工程技术-电化学

CiteScore

8.50

自引率

3.70%

发文量

160

审稿时长

1.2 months

期刊介绍： Electrochemistry Communications is an open access journal providing fast dissemination of short communications, full communications and mini reviews covering the whole field of electrochemistry which merit urgent publication. Short communications are limited to a maximum of 20,000 characters (including spaces) while full communications and mini reviews are limited to 25,000 characters (including spaces). Supplementary information is permitted for full communications and mini reviews but not for short communications. We aim to be the fastest journal in electrochemistry for these types of papers.