通过微量溶解的有机分子激活有机电极
Xin Huang1, Xuan Qiu1, Wei Wang2
1Department of Chemistry and Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Institute of New Energy, iChEM (Collaborative Innovation Centre of Chemistry for Energy Materials), Fudan University, Shanghai 200433, China.
Journal of the American Chemical Society
|November 16, 2023
概括
一种新的有机阴极材料,dbenzo[b,i]phenazine-5,7,12,14-tetrone (DPT),使高性能水性电池成为可能. 它独特的溶解再沉积机制克服了可持续能源储存的导电性限制.
科学领域:
- 材料科学
- 电化学
- 可持续能源
背景情况:
- 有机电极材料提供可调节的结构和可持续性.
- 低电子导电性需要高碳添加剂含量和低质量负载.
- 为水性电池开发高效的有机阴极材料仍然是一个挑战.
研究的目的:
- 合成和评估二[b,i]-5,7,12,14- (DPT) 作为水性电池的阴极活性物质.
- 在水性电池中研究DPT的充电储存机制.
- 展示包括容量,速率能力和周期寿命在内的高性能特性.
主要方法:
- 二[b,i]-5,7,12,14- (DPT) 的合成
- 在水性 Zn 电池中制造基于 DPT 的阴极并进行电化学测试.
- 分析电荷储存机制,包括Zn2+储存和氧化还原介导.
主要成果:
- DPT表现出Zn2+储存作为主导的阴极反应.
- 基于DPT的阴极实现了高容量 (367 mAh g-1),高速率性能和特殊的周期寿命 (12000个周期).
- 微量溶解排放产品 (DPT*) 作为氧化还原介质,提高性能,尽管DPT具有绝缘性和高质量负载 (10 mg cm-2),含有低碳添加剂 (10%重量).
结论:
- DPT是高性能水性电池的一个有前途的有机阴极材料.
- 涉及排放产品的溶解-重新沉积机制是克服导电性限制的关键.
- 这项研究提供了一种设计高性能有机电极的新策略,用于可持续储能.
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