从农业废弃物花生中获得的N,S配碳材料的一步碳化合成,用于高性能对称超级电容器
Xiaoyang Cheng1, Lihua Zhang1, Lingyan Li1
1Key Laboratory of Magnetic Molecules and Magnetic Information Materials of Ministry of Education, School of Chemical and Material Science, Shanxi Normal University, Taiyuan, 030032, People's Republic of China.
从花生中获得的和硫联合合的碳材料为电化学能量存储提供了低成本,环保的解决方案. 优化的NSPC-4材料在超级电容器中表现出卓越的性能.
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
- 可再生能源可再生能源是可再生能源.
背景情况:
- 来自生物质的碳材料是电化学储能应用的成本效益高且可持续的资源.
- 用 (N) 和硫 (S) 等异构原子对碳材料进行合,可以增强其电化学性能.
- 花生代表了碳材料合成的丰富和环保的生物质来源.
研究的目的:
- 从花生中合成和特征化和硫共碳材料 (NSPC),用于超级电容器应用.
- 研究激活剂 (thiourea) 含量对合成碳材料的结构和电化学特性的影响.
- 为了评估在对称超级电容器 (SSC) 中优化NSPC材料的性能.
主要方法:
- 用花生作为碳来源和尿素作为激活剂制备N和S联合合碳材料 (NSPC).
- 优化NSPC材料 (NSPC-4) 通过改变花生与尿素的比率 (2g:4g).
- 材料的特定表面积,孔隙结构,元素组成和电导率的表征.
- 在对称超级电容器 (SSC) 配置中对NSPC-4进行电化学测试.
主要成果:
- 最佳的NSPC-4材料具有很大的特定表面积和独特的孔隙结构.
- 元素分析证实了N,S和O异质原子的成功结合,增强了伪电容.
- 由于其短距离的有序石墨结构,NSPC-4显示出出色的导电性.
- 与NSPC-4组装的对称超级电容器在350W/kg的功率密度下实现了8.3Wh/kg的能量密度.
结论:
- 这种简单,绿色和经济的合成方法可以从花生中获得高性能N和S联合的碳材料.
- 由于其增强的性能,NSPC-4材料显示出电化学储能应用的巨大潜力.
- 优化激活剂含量对于最大限度地提高生物质衍生碳材料的特定表面积,孔隙结构和电化学性能至关重要.
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