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用碳点为水性离子电池构建的高容量和长寿命阴极完全由碳点构建

Tian-Bing Song¹, Qian-Li Ma¹, Bao-Juan Wang¹

¹Department of Chemistry, Shanghai Key Laboratory of Electrochemical and Thermochemical Conversion for Resources Recycling, Fudan University, Shanghai, 200438, China.

Angewandte Chemie (International ed. in English)

|June 23, 2025

概括

这项研究引入了o-phenylenediamine衍生碳点 (CD) 作为水性离子电池 (ZIB) 的新型阴极材料. 这些CD显示出高容量和稳定的循环,挑战了CD作为惰性材料的观点.

科学领域:

电化学电化学电化学
材料科学材料科学材料科学
储能储能储能储能储能储能

背景情况:

碳点 (CD) 在电化学中广泛使用,但通常作为惰性添加剂.
之前的研究忽视了CD作为储能器件中主要活性材料的潜力.

研究的目的:

研究o-phenylenediamine衍生碳点 (p-CDs) 作为水性离子电池 (ZIB) 的唯一阴极材料.
探索p-CDs在ZIB中的电化学特性和离子储存机制.

主要方法:

合成由o-phenylenediamine衍生的碳点 (p-CDs).
制造p-CD仅用于ZIBs的天极材料.
电化学性能测试包括容量,速率能力和循环稳定性.
描述和理论计算以阐明离子储存机制.

主要成果:

p-CDs 阴极在0.1 A g-1 时提供了290 mAh g-1 的容量,在10 A g-1 时提供了103 mAh g-1.
实现了10-8的超高离子扩散系数10-7cm2s-1 .
长期循环稳定,经过1万个循环后保持87.4%的容量.

结论:

作为ZIBs的阴极材料,p-CD表现出极好的电化学性能.
与缺电子原子的π结合的酶结构作为可逆Zn2+和H+嵌入的活性位点.
这项工作确立了CD作为先进电池技术的有希望的高容量材料.

关键词:

容量容量容量容量碳点是一些碳点.阴极材料的材料是正极材料.终身使用时间终身使用时间离子电池离子电池

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