有机铜箔集流器改性对双离子电池性能的影响

IF 2.6 4区 化学 Q3 CHEMISTRY, PHYSICAL
Ionics Pub Date : 2025-06-09 DOI:10.1007/s11581-025-06443-6
Jie Song, Yunyan Zhang, Shimei Xu, Yiqian Wu, Rengui Xiao, Xiang Ke
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引用次数: 0

摘要

近年来,双离子电池因其高效的离子插入机制、丰富的电极材料选择、化学稳定性以及工作电压高、成本低、安全性强等优点而备受关注。有机电极材料因其可设计性和较高的理论容量而被广泛应用于双离子电池中。然而,有机电极材料与集流器的相容性影响了双离子电池的循环性能和容量性能。本文在铜箔集流器表面电聚合了一种新型的硫酸掺杂聚苯胺复合氧化铜薄膜结构。电聚合驱动氧化和氧化铜模板的协同作用促进了掺杂聚苯胺纳米颗粒的形成,将聚合物转化为粒径为10 nm的远程有序晶体结构。由于掺杂聚苯胺和氧化铜的晶体纳米结构,在充放电循环过程中,阳极和活性材料之间发生界面变化,使内部电荷转移电阻从112降低到40 Ω。虽然双离子电池在高倍率下表现出显著的改善,但实验表明,在5℃下循环2000次后,双离子电池的容量仍然保持在44 mAh g−1,容量保持率为69.7%。而未改性集流器的双离子电池在5℃下循环2000次后容量仅为12 mAh g−1。本文讨论了最小尺寸复合聚苯胺材料的形成机理及其对双离子电池性能的影响机理。图形抽象
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Influence of organic copper foil current collector modification on the performance of dual-ion batteries

Dual-ion batteries have got significant attention in recent years due to their efficient ion insertion mechanism, abundant electrode material options, and chemical stability, showcasing advantages such as high operating voltage, low cost, and enhanced safety. Organic electrode materials are often used in dual-ion batteries due to their designability and high theoretical capacity. However, the compatibility between organic electrode materials and current collectors affects the cycling and capacity performance of dual-ion batteries. In this paper, a novel thin film structure of sulfuric acid-doped polyaniline composite copper oxide is electropolymerized on the surface of copper foil current collector. The synergistic effect of electropolymerization-driven oxidation and copper oxide templating facilitates the formation of doped polyaniline nanoparticles, transforming the polymer into long-range ordered crystalline structures with a particle size of 10 nm. Because of the crystalline nanostructure of doped polyaniline and copper oxide, there is an interface change between the anode and active material during charge–discharge cycles, reducing the internal charge transfer resistance from 112 to 40 Ω. While the dual-ion battery shows a significant improvement at high rates, experiments show that the dual-ion battery still retains a capacity of 44 mAh g−1 after 2000 cycles at 5 C, with a capacity retention rate of 69.7%, but the capacity of dual-ion battery without the modification current collectors is only 12 mAh g−1 after 2000 cycles at 5 C. The paper discusses the mechanism of the smallest size composite polyaniline material and the influence mechanisms on the performance of dual-ion batteries.

Graphical Abstract

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来源期刊
Ionics
Ionics 化学-电化学
CiteScore
5.30
自引率
7.10%
发文量
427
审稿时长
2.2 months
期刊介绍: Ionics is publishing original results in the fields of science and technology of ionic motion. This includes theoretical, experimental and practical work on electrolytes, electrode, ionic/electronic interfaces, ionic transport aspects of corrosion, galvanic cells, e.g. for thermodynamic and kinetic studies, batteries, fuel cells, sensors and electrochromics. Fast solid ionic conductors are presently providing new opportunities in view of several advantages, in addition to conventional liquid electrolytes.
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