Metallic 1T Phase MoS2 Nanosheets Covalently Functionalized with BBD Molecules for Enhanced Supercapacitor Performances

IF 8.3 2区 材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY
Weikang Zheng, Mingzi Sun, Ruijie Yang, Qingyong Zhang, Ting Ying, Liang Mei, Ruixin Yan, Yue Zhang, Honglu Hu, Jun Fan, Bolong Huang, Zhiyuan Zeng
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引用次数: 0

Abstract

Metallic 1T phase molybdenum disulfide (MoS2) is among the most promising electrode materials for supercapacitors, but its capacitance and cyclability remain to be improved to meet the constantly increasing energy storage needs in portable electronics. In this study, we present a strategy, covalent functionalization, which achieves the improvement of capacitance of metallic 1T phase MoS2. Covalently functionalized by the modifier 4-bromobenzenediazonium tetrafluoroborate, the metallic MoS2 membrane exhibits increased interlayer spacing, slightly curled layered architecture, enhanced charge transfer, and improved adsorption capabilities toward electrolyte molecules and ions. Thanks to these boosted properties, the functionalized metallic MoS2 membrane exhibited excellent supercapacitor performances in a 0.5 M TBABF4 (acetonitrile as the solvent) electrolyte (with a specific capacitance of 135.67 F/cm3 at 1 A/g, more than three times that of the unfunctionalized metallic MoS2 membrane) and good stability, which can maintain a capacitance retention of 76.0% after 10 000 charge–discharge cycles.

Abstract Image

金属1T相MoS2纳米片与BBD分子共价功能化增强超级电容器性能
金属1T相二硫化钼(MoS2)是最有前途的超级电容器电极材料之一,但其电容和可循环性仍有待改进,以满足便携式电子设备不断增长的能量存储需求。在本研究中,我们提出了一种共价功能化策略,实现了金属1T相MoS2电容的改善。通过改性剂4-溴苯二氮四氟硼酸盐的共价官能化,金属MoS2膜表现出层间间距增大,层状结构略微卷曲,电荷转移增强,对电解质分子和离子的吸附能力增强。在0.5 M TBABF4(乙腈为溶剂)电解液中(1 a /g时比电容为135.67 F/cm3,是未功能化MoS2膜的3倍以上),表现出优异的超级电容器性能和良好的稳定性,在10000次充放电循环后保持76.0%的电容保持率。
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来源期刊
ACS Applied Materials & Interfaces
ACS Applied Materials & Interfaces 工程技术-材料科学:综合
CiteScore
16.00
自引率
6.30%
发文量
4978
审稿时长
1.8 months
期刊介绍: ACS Applied Materials & Interfaces is a leading interdisciplinary journal that brings together chemists, engineers, physicists, and biologists to explore the development and utilization of newly-discovered materials and interfacial processes for specific applications. Our journal has experienced remarkable growth since its establishment in 2009, both in terms of the number of articles published and the impact of the research showcased. We are proud to foster a truly global community, with the majority of published articles originating from outside the United States, reflecting the rapid growth of applied research worldwide.
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