相关实验视频
Updated: Jun 15, 2025

Preparation of Carbon Nanosheets at Room Temperature
Published on: March 8, 2016
通过通过化反应构建薄碳涂层来提高硬碳的储存性能
Yelin Ji1, Shenqi Li1, Tao Yuan1
1College of Sciences & Institute for Sustainable Energy, Shanghai University, Shanghai 200444, China.
这项研究引入了一种新的表面改造,用于离子电池中的基于的硬碳阳极. 葡萄糖移植提高了最初的库伦比克效率和循环稳定性,提供了一个有前途的低成本替代品.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 储能 储能 储能 储能 储能 储能
背景情况:
- 基于的硬碳 (PHC) 是离子电池的成本效益高的阳极.
- 传统的PHC制备涉及预氧化,导致缺陷,氧气合并和低于最佳的电化学性能 (初始库伦比克效率低,循环稳定性差).
研究的目的:
- 为PHC制定表面工程战略,以提高电化学性能.
- 为了在PHC上实现低成本,纳米尺度的碳涂层,而没有有害的氧化前步骤.
主要方法:
- 通过化反应将化学活性葡萄糖分子植入PHC表面.
- 在较低的温度下碳化葡萄糖层,以创建精致的孔隙结构并最大限度地减少功能组.
- 在离子电池半电池和全电池中评估改性PHC的电化学性能.
主要成果:
- 涂上葡萄糖的PHC显示出328.5mAh/g的高可逆容量.
- 在0.02 A/g时达到92.08%的高初始库伦比克效率 (ICE).
- 经过修改的PHC表现出极好的循环稳定性和与各种阴极材料的兼容性,在全细胞配置中不需要预化.
结论:
- 用葡萄糖接种修改表面提供了一种有效的策略,以提高基于的硬碳阳极的性能.
- 开发的方法提供了一种低成本,可扩展的方法来改善离子电池的阳极特性.
- 该技术具有普遍性,如树脂基硬碳的性能改进所示.
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