Three‐dimensional carbon nanotube framework enables low‐cost LiFe5O8 anode material for high‐performance lithium‐ion batteries

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2024-08-06 DOI:10.1002/sia.7347

Lei Li, Jinsheng Huo, Qiwen Ran, Xingquan Liu

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引用次数: 0

Abstract

LiFe5O8 is regarded as a promising material, which is used as anode for lithium‐ion batteries on account of its lower cost and higher theoretical capacity. However, its practical applications are hindered by the low electron transfer rate, poor cycling performance, and huge magnification of lattice volume. In this work, a LiFe5O8/carbon nanotubes (CNTs) composite anode is designed to realize the ideal anode for low‐cost lithium‐ion batteries, showing broad commercial application prospects. It is found that the three‐dimensional conductive network of CNTs is used to accelerate electron transfer rate within the LiFe5O8 particles, thereby significantly reducing the reversible reaction barrier (Fe/Fe3O4). In addition, it can also alleviate the volume change of electrode, which maintains a stable Li+ insertion/extraction behavior during long‐term cycles. As a consequence, there is still a high capacity (427.3 mAh g−1) of the LiFe5O8/CNTs 3% anode reserved after 50 cycles at 0.5 C whereas the bare LiFe5O8 anode only delivers a low capacity of 220.6 mAh g−1 along with a poor cycling stability. This work highlights the outstanding contribution of electronic conductivity toward the electrochemical performance of LiFe5O8 anode and provides a low‐cost and commercially applicable composite anode for developing lower cost lithium‐ion batteries.

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三维碳纳米管框架实现了用于高性能锂离子电池的低成本 LiFe5O8 负极材料

LiFe5O8 是一种前景广阔的材料，因其成本低、理论容量高而被用作锂离子电池的负极。然而，电子转移率低、循环性能差以及晶格体积的巨大放大阻碍了它的实际应用。本研究设计了一种 LiFe5O8/碳纳米管（CNTs）复合负极，实现了低成本锂离子电池的理想负极，具有广阔的商业应用前景。研究发现，碳纳米管的三维导电网络可用于加快 LiFe5O8 颗粒内的电子转移率，从而显著降低可逆反应势垒（Fe/Fe3O4）。此外，它还能缓解电极的体积变化，从而在长期循环过程中保持稳定的 Li+ 插入/抽取行为。因此，LiFe5O8/CNTs 3% 阳极在 0.5 C 条件下循环 50 次后仍能保持较高的容量（427.3 mAh g-1），而裸 LiFe5O8 阳极仅能提供 220.6 mAh g-1 的低容量，且循环稳定性较差。这项研究强调了电子导电性对 LiFe5O8 负极电化学性能的突出贡献，并为开发低成本锂离子电池提供了一种低成本、商业化的复合负极。

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

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.