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基于高性能离子电容器的S,N-编码蜂碳阴极的扩散研究
Qiaoyu Zhang1, Ming Yuan1, Lina Liu1
1School of Materials Science and Engineering, Jiangsu University of Science and Technology, Zhenjiang 212003, China.
Langmuir : the ACS journal of surfaces and colloids
|February 26, 2024
概括
本研究介绍了用于先进的离子电容器 (ZIC) 的废弃玉米支架中提取的蜂结构的S,N-编碳 (SNPC). 新型SNPC阴极显著提高了ZIC中的电化学性能和循环稳定性.
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:
- 离子电容器 (ZICs) 由于稳定性和成本,对储能非常有希望.
- 目前的ZIC在特定容量和循环稳定性方面面临限制.
- 废弃物生物质为先进材料提供了一个未充分利用的资源.
研究的目的:
- 开发一种用于提高离子电容性能的新型电极材料.
- 为了研究硫和二氧化碳的电化学特性.
- 为可持续的储能解决方案利用废弃的玉米.
主要方法:
- 废弃的玉米和硫尿素的一烧结,以产生蜂结构的S,N-编碳 (SNPC).
- 在水性离子电容器中用SNPC作为阴极的电化学特征.
- 使用ZnSO4和ZnCl2.2混合物的电解质组成的优化.
- 密度函数理论 (DFT) 计算以了解离子吸附机制.
主要成果:
- SNPC的表面积很大 (∼909.0 m2/g) 并且有大量活跃点.
- 优化的电解质 (2 M ZnSO4 + 0.5 M ZnCl2) 促进了无水溶解结构 (ZnCl42−).
- SNPC-800阴极在0.1 A/g时达到179.1 mA h/g的特定容量.
- 高能量密度 (89.6Wh/kg在53.8W/kg) 和卓越的循环稳定性 (99.8%的保留超过5000个循环).
结论:
- 从废弃生物质中获得的蜂结构的SNPC是ZIC的高效阴极材料.
- S,N 兴奋剂和蜂结构的协同效应增强了离子的运输和储存.
- 这项工作提供了一种可持续的方法,用于将生物质回收成高性能储能材料.
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