用于储存电化学能量的异常电容的含碳
Tianquan Lin1, I-Wei Chen2, Fengxin Liu3
1State Key Laboratory of High Performance Ceramics and Superfine Microstructure and CAS Key Laboratory of Materials for Energy Conversion, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, P.R. China. Beijing National Laboratory for Molecular Sciences and State Key Laboratory of Rare Earth Materials Chemistry and Applications, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, P.R. China.
用添加的碳超级电容器在水性电解质中达到高容量 (855 F/g). 这一突破通过利用缺陷氧化还原反应来增强能量储存,提高电化学电池的性能.
科学领域:
- 材料科学
- 电化学
- 能量储存
背景情况:
- 基于碳的超级电容器提供高功率,但与电池相比缺乏能量密度.
- 现有的超级电容器需要进一步增强储能能力,以适用于更广泛的应用.
研究的目的:
- 开发高能密度的超级电容器的先进碳材料.
- 为了研究 doped 顺序 mesoporous 几层碳的电化学特性.
- 探索双极水电解质电化学电池的储能潜力.
主要方法:
- 用添加的有序半孔少层碳的合成.
- 在水性电解质中进行电化学表征,包括电容和充/放电速度测量.
- 对相关缺陷的氧化还原反应及其对导电性的分析.
主要成果:
- 在水性电解质中达到每克855法拉德的高容量.
- 证明双极充电/放电速度很快,类似于碳.
- 在缺陷下观察到强烈的氧化还原反应,增强电化学活性而不损害导电性.
- 开发了双极水电解质电化学电池,能量密度为41Wh/kg (19.5Wh/L).
结论:
- 剂可以将惰性碳转化为电化学活性物质,显著提高超级电容器的性能.
- 开发的超级电容器的功率密度和寿命与传统的碳设备相美.
- 这种进步为高性能,低成本的储能解决方案提供了有前途的途径.
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