Synergistic enhancement of lithium iron phosphate electrochemical performance by organic zinc source doping and crystalline carbon layer capping

IF 4.1 3区化学 Q1 CHEMISTRY, ANALYTICAL Journal of Electroanalytical Chemistry Pub Date : 2024-10-22 DOI:10.1016/j.jelechem.2024.118716

Chengyu Pan, Bowen Li, Weicheng Xie, Haoyan Yin, Yanmin Gao

引用次数: 0

Abstract

In this study, lithium iron phosphate (LFP) is prepared as cathode material by hydrothermal synthesis method and the combined effect of doping and capping is applied to co-modify it. We thoroughly investigate how Zn²⁺ doping and PA capping layer affect the crystal structure, microscopic morphology, and electrochemical properties of LFP cathode materials. The experimental results show that when co-modified with 5 % Zn²⁺ doping combined with 7 % PA capping layer, the resulting cathode material exhibits a discharge specific capacity of 165.5 mAh g⁻¹, and the capacity retention rate can still be maintained at a high level of 98.6 % after 200 charge–discharge cycles.

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通过有机锌源掺杂和晶体碳层封盖协同提高磷酸铁锂的电化学性能

本研究采用水热合成法制备了磷酸铁锂（LFP）正极材料，并应用掺杂和封盖的联合效应对其进行了共修饰。我们深入研究了 Zn2+ 掺杂和 PA 封盖层如何影响磷酸铁锂正极材料的晶体结构、微观形貌和电化学性能。实验结果表明，当掺杂 5% 的 Zn2+ 并结合 7% 的 PA 盖层进行共修饰时，所得到的阴极材料的放电比容量为 165.5 mAh g-1，并且在 200 次充放电循环后，容量保持率仍能保持在 98.6% 的高水平。

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

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.