将硫封装成凝衍生的气杂的半孔和微孔碳海绵,用于高性能硫电池
Lin Sun1,2, Yanxiu Liu2, Jie Xie2
1State Key Laboratory of Coordination Chemistry, MOE Key Laboratory of Mesoscopic Chemistry, MOE Key Laboratory of High Performance Polymer Materials and Technology, Jiangsu Key Laboratory of Advanced Organic Materials, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, China.
ACS applied materials & interfaces
|February 27, 2024
概括
研究人员开发了一种化碳海绵 (NPCS),以改进硫电池 (LSB). 这种具有成本效益的材料提高了硫的利用率和电池性能,为先进的LSB铺平了道路.
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:
- 硫电池 (LSB) 面临的挑战是硫的低效利用和反应动力学缓慢.
- 纯碳宿主通过弱范德瓦尔斯力与多硫化中间体 (LiPSs) 产生有限的相互作用.
- 经济的合成异构原子合的碳对于有效的硫固定在LSBs至关重要.
研究的目的:
- 开发一个具有成本效益的层次性多孔化碳海绵 (NPCS),以提高LSB中的硫利用率.
- 为了研究 LSB 中输入硫的 NPCS 电极的电化学性能.
主要方法:
- 使用模板辅助聚合方法合成具有高BET表面积的NPCS (3182.2 m2 g-1).
- 使用无机盐,自由基聚合和冷干燥技术形成了等级性毛孔.
- 硫被固定在NPCS支架上,以创建用于电化学测试的S/NPCS电极.
主要成果:
- 该S/NPCS电极实现了80%的硫利用率.
- 在600个周期以5.0 A g-1.1保持400 mA hg-1的高可逆特异性容量后.
- 电极表现出优越的速率能力和显著的电化学性能.
结论:
- 开发的NPCS材料有效地解决了LSB中的硫利用和动力限制.
- 这项工作展示了一种具有成本效益的方法,用于为LSB设计高性能碳基电极.
- 这些发现有望激发未来对先进电池材料的研究.
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