Three-dimensional through-hole aluminum foam for enhancing the electrochemical performance of LiFe0.5Mn0.5PO4@C cathode

IF 8.9 2区 工程技术 Q1 ENERGY & FUELS
Shuangbiao Ma , Shuang Song , Qingchen Guan , Jinbao Wu , Qingzhe Lin , Lianshan Sun , Wanqiang Liu
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Abstract

In this work, a comprehensive investigation on the structure and electrochemical performance of LMFP@C electrodes with different current collectors was conducted using various testing methods such as SEM, peel-strength tests, contact-angle measurements, conductivity assessments, and electrochemical evaluations. The results revealed that the foam‑aluminum-based LMFP electrode (LMFP@C/ALF) exhibited stronger material adhesion and superior structural stability compared to the traditional aluminum-foil-based electrode (LMFP@C/AL). Its three-dimensional porous structure effectively mitigated electrode cracking during long-term cycling and increased the electrode-electrolyte contact area, thereby enhancing electrochemical performance. Moreover, the LMFP@C/ALF electrode outperformed others in electrochemical performance. At a current density of 1C, its initial discharge specific capacity reached 115.4 mAh g−1 and remained at 90 mAh g−1 after 1000 cycles. Even at a high current density of 5C, it maintained excellent high-rate performance with an initial discharge specific capacity of 94.2 mAh g−1 and a retained discharge specific capacity of 66.2 mAh g−1 after 1000 cycles. These findings highlight the significant advantages of the foam aluminum current collector in enhancing the performance of LMFP cathode materials.

Abstract Image

三维通孔泡沫铝提高LiFe0.5Mn0.5PO4@C阴极电化学性能
本文采用SEM、剥离强度测试、接触角测量、电导率评估和电化学评估等多种测试方法,对具有不同集流器的LMFP@C电极的结构和电化学性能进行了全面研究。结果表明,与传统的铝箔电极(LMFP@C/AL)相比,泡沫铝基LMFP电极(LMFP@C/ALF)具有更强的材料粘附性和更好的结构稳定性。其三维多孔结构有效减轻了长期循环过程中电极的开裂,增加了电极与电解液的接触面积,从而提高了电化学性能。此外,LMFP@C/ALF电极的电化学性能优于其他电极。在1C电流密度下,其初始放电比容量达到115.4 mAh g - 1,循环1000次后保持在90 mAh g - 1。即使在5C的高电流密度下,它也保持了优异的高倍率性能,初始放电比容量为94.2 mAh g−1,1000次循环后保持放电比容量为66.2 mAh g−1。这些发现突出了泡沫铝集流器在提高LMFP阴极材料性能方面的显著优势。
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来源期刊
Journal of energy storage
Journal of energy storage Energy-Renewable Energy, Sustainability and the Environment
CiteScore
11.80
自引率
24.50%
发文量
2262
审稿时长
69 days
期刊介绍: Journal of energy storage focusses on all aspects of energy storage, in particular systems integration, electric grid integration, modelling and analysis, novel energy storage technologies, sizing and management strategies, business models for operation of storage systems and energy storage developments worldwide.
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