Polyaniline-Modified MXene/Carbon Nanotube Scaffold Enabling High-Rate and Long-Cycle Zinc–Iodine Batteries

IF 9.1 1区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Nano Letters Pub Date : 2026-10-12 DOI:10.1021/acs.nanolett.6c04159

Xiaoqian Gong,Yixing Wang,Mengya Ge,Qinghong Wang

引用次数: 0

Abstract

Aqueous zinc–iodine (Zn–I2) batteries are attractive for large-scale energy storage because of their low cost and inherent safety. However, the practical use of an I2 cathode is severely restricted by poor electronic conductivity and the shuttle effect of soluble polyiodides. Herein, a synergistic scaffold composed of MXene and carbon nanotubes (CNTs) modified with protonated polyaniline (PANI) via electrostatic interactions was designed. The MXene/CNT scaffold ensures overall conductivity and structural integrity. The protonated PANI immobilizes iodine species through nitrogen-containing groups and accelerates their interconversion, effectively suppressing the shuttle effect. The MXene/CNTs/PANI-I2 cathode with an iodine loading of 43.96 wt % achieves a superior specific capacity of 150 mAh g–1 at a high rate of 20 C as well as excellent cycling stability over 10 000 cycles. This work offers a viable strategy for developing stable I2 cathodes for high-performance Zn–I2 batteries.

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聚苯胺修饰MXene/碳纳米管支架制备高倍率长循环锌碘电池

水相锌碘（Zn-I2）电池由于其低成本和固有的安全性，在大规模储能方面具有很大的吸引力。然而，I2阴极的实际使用受到电子导电性差和可溶性多碘化物的穿梭效应的严重限制。本文设计了一种由MXene和经质子化聚苯胺（PANI）修饰的碳纳米管（CNTs）通过静电相互作用组成的协同支架。MXene/CNT支架可确保整体导电性和结构完整性。质子化聚苯胺通过含氮基团固定碘，加速其相互转化，有效抑制穿梭效应。碘负载为43.96 wt %的MXene/CNTs/PANI-I2阴极在20℃的高倍率下具有150 mAh g-1的优越比容量以及超过10 000次循环的优异循环稳定性。这项工作为开发高性能锌- I2电池的稳定I2阴极提供了一种可行的策略。

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

Nano Letters 工程技术-材料科学：综合

CiteScore

16.80

自引率

2.80%

发文量

1182

审稿时长

1.4 months

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