形成用于高性能锌离子水电池的三维掺磷 MoO2/C 纳米结构

IF 4.1 3区化学 Q1 CHEMISTRY, ANALYTICAL

Journal of Electroanalytical Chemistry Pub Date : 2024-10-20 DOI:10.1016/j.jelechem.2024.118729

Xiao Zhang, Peng Huang, Mengjie Li, Chuxin Deng, Shilei Xie, Dong Xie, Peng Liu, Min Zhang, Faliang Cheng

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引用次数: 0

摘要

由于具有高电子传导性、高理论容量和其他优点，二氧化硅被认为是锌离子电池（ZIB）的一种有前途的阴极。然而，MoO2 在离子插入/拔出过程中会出现明显的体积变化，导致电池循环性能下降。本文通过原位引入碳骨架并随后掺入磷，制备了一种新型 P-MoO2/C 异质结构。由于刚性碳结构和氧空位的存在，MoO2 在锌离子插层/去插层过程中的结构降解得到了抑制。与未掺杂的 MoO2/C 和商用 MoO2 相比，P-MoO2/C 表现出更优越的循环稳定性，在 0.1A-g-1 条件下的初始放电比容量高达 197.3 mAh-g-1，在 1A-g-1 条件下循环 200 次后的容量保持率为 60.8%。这项研究为设计特殊结构以及提高 MoO2 的储锌能力提供了新的途径。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

The formation of three-dimensional phosphorus-doped MoO2/C nanostructures for high-performance aqueous zinc-ion batteries

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The formation of three-dimensional phosphorus-doped MoO2/C nanostructures for high-performance aqueous zinc-ion batteries

MoO₂ is considered as a promising cathode for zinc ion batteries (ZIBs) due to its high electronic conductivity, high theoretical capacity, and other advantages. However, MoO₂ shows significant volume changes during ion insertion/de-insertion, leading to a decrease in battery cycling performance. In this paper, a novel P-MoO₂/C heterostructure was prepared by introducing carbon skeleton in situ and phosphorus doping subsequently. Due to the rigid carbon structure and oxygen vacancies, the structural degradation of MoO₂ was inhibited during the zinc ions intercalation/de-intercalation. Compared with the undoped MoO₂/C and commercial MoO₂, P-MoO₂/C demonstrates a superior cycle stability including a high initial discharge specific capacity of 197.3 mAh·g⁻¹ at 0.1A·g⁻¹ and 60.8 % capacity retention after 200 cycles at 1A·g⁻¹. This works provides a new pathway for the design of specialized structures as well as the enhancement of zinc storage capabilities of MoO_2.

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来源期刊

Journal of Electroanalytical Chemistry 化学-电化学

CiteScore

7.80

自引率

6.70%

发文量

912

审稿时长

2.4 months

期刊介绍： The Journal of Electroanalytical Chemistry is the foremost international journal devoted to the interdisciplinary subject of electrochemistry in all its aspects, theoretical as well as applied. Electrochemistry is a wide ranging area that is in a state of continuous evolution. Rather than compiling a long list of topics covered by the Journal, the editors would like to draw particular attention to the key issues of novelty, topicality and quality. Papers should present new and interesting electrochemical science in a way that is accessible to the reader. The presentation and discussion should be at a level that is consistent with the international status of the Journal. Reports describing the application of well-established techniques to problems that are essentially technical will not be accepted. Similarly, papers that report observations but fail to provide adequate interpretation will be rejected by the Editors. Papers dealing with technical electrochemistry should be submitted to other specialist journals unless the authors can show that their work provides substantially new insights into electrochemical processes.