MBene with Redox-Active Terminal Groups for an Energy-Dense Cascade Aqueous Battery

IF 27.4 1区 材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY
Zishuai Zhang, Yi Li, Funian Mo, Jiaqi Wang, Wei Ling, Miao Yu, Yan Huang
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Abstract

Two-dimensional (2D) transition metal borides (MBenes), new members of the 2D materials family, hold great promise for use in the electrocatalytic and energy storage fields because of their high specific area, high chemical activity, and fast charge carrier mobility. Although various types of MBenes are reported, layered MBenes featuring redox-active terminal groups for high energy output are not yet produced. A facile and energy-efficient method for synthesizing MBenes equipped with redox-active terminal groups for cascade Zn||I2 batteries is presented. Layered MBenes have ordered metal vacancies and ─Br terminal groups, enabling the sequential reactions of I/I0 and Br/Br0. The I2-hosting MBene-Br cathode results in a specific energy as high as 485.8 Wh kg−1 at 899.7 W kg−1 and a specific power as high as 6007.7 W kg−1 at 180.2 Wh kg−1, far exceeding the best records for Zn||I2 batteries. The results of this study demonstrate that the challenges of MBene synthesis can be overcome and reveal an efficient path for producing high-performance redox-active electrode materials for energy-dense cascade aqueous batteries.

Abstract Image

用于能量密度级联水电池的具有氧化还原活性终端基团的 MBene。
二维(2D)过渡金属硼化物(MBenes)是二维材料家族的新成员,因其具有高比面积、高化学活性和快速电荷载流子迁移率等特点,在电催化和储能领域有着广阔的应用前景。虽然已有各种类型的 MBenes 报道,但具有氧化还原活性末端基团以实现高能量输出的层状 MBenes 尚未问世。我们提出了一种简便、节能的方法,用于合成具有氧化还原活性末端基团的层状 MBenes,用于级联 Zn||I2 电池。层状 MBenes 具有有序的金属空位和 -Br 末端基团,可实现 I- /I0 和 Br- /Br0 的顺序反应。I2 寄存 MBene-Br 阴极的比能量高达 485.8 Wh kg-1(899.7 W kg-1),比功率高达 6007.7 W kg-1(180.2 Wh kg-1),远远超过了 Zn||I2 电池的最佳记录。这项研究的结果表明,MBene 合成所面临的挑战是可以克服的,并为生产用于高能量级联水电池的高性能氧化还原活性电极材料揭示了一条有效的途径。本文受版权保护。保留所有权利。
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
Advanced Materials
Advanced Materials 工程技术-材料科学:综合
CiteScore
43.00
自引率
4.10%
发文量
2182
审稿时长
2 months
期刊介绍: Advanced Materials, one of the world's most prestigious journals and the foundation of the Advanced portfolio, is the home of choice for best-in-class materials science for more than 30 years. Following this fast-growing and interdisciplinary field, we are considering and publishing the most important discoveries on any and all materials from materials scientists, chemists, physicists, engineers as well as health and life scientists and bringing you the latest results and trends in modern materials-related research every week.
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