硫桥式键使得MnS的结构调节和空间限制成为高级离子电容器的结构调节和空间限制
Yining Chen1, Shaohui Li1, Jingwei Chen2
1School of Materials Science and Engineering, Zhengzhou University, Zhengzhou 450001, PR China.
Journal of colloid and interface science
|March 13, 2024
概括
与石墨烯集成的铁硫化纳米粒子与石墨烯相结合,为储存创造了一个优越的阳极. 这种新的复合材料提高了电化学性能,导致具有延长寿命的高容量离子电容器.
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
- 纳米技术纳米技术
背景情况:
- 硫化 (MnS) 是用于储存的经济有效的阳极材料.
- 然而,MnS在循环过程中表现出较差的电子导电性,较慢的离子动力学和显著的体积变化.
- 这些局限性阻碍了其在高性能储能设备中的实际应用.
研究的目的:
- 开发一种新的复合材料,以克服MnS在储存方面的局限性.
- 为了提高电化学性能,速度能力和基于MnS的阳极的周期稳定性.
- 使用开发的阳极材料制造高性能离子电容器 (SIC).
主要方法:
- 一种含有Fe合的MnS纳米粒子/正电荷的减少氧化石墨烯 (Fe-MnS/PG) 的板状异构复合物的合成.
- 复合材料的结构和电化学性能的表征.
- 使用Fe-MnS/PG阳极的离子电容器的组装和测试.
主要成果:
- 这种Fe-MnS/PG复合材料在0.1 A/g时显示出高可逆容量567 mAh/g.
- 观察到出色的速率能力,在10 A/g时保留了192 mAh/g.
- 制造的SIC实现了119Wh kg-1的高能量密度,并在1A/g的5000个循环后保持了77%的容量.
结论:
- 铁和石墨烯集成通过增强导电性和结构稳定性来协同改善MnS阳极性能.
- Fe-MnS/PG复合材料是高性能,寿命长的离子电容器的一个有前途的阳极材料.
- 这一战略为开发用于实际储存应用的先进阳极材料提供了可行的途径.
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