与KSeCN双功能添加剂的协同相间调节,用于稳定和高性能硫电池
Junpeng Rao1,2,3, Yuxuan Feng1,2, Tong Yu1
1Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China. fli@imr.ac.cn.
Materials horizons
|December 22, 2025
概括
单酸盐 (KSeCN) 添加剂通过稳定电极来增强硫电池. 它提高了循环稳定性,并抑制了下一代能源存储的树生长.
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) 显示出对高能量密度存储的前景.
- 关键的挑战包括聚硫化物穿和不受控制的沉积.
研究的目的:
- 引入单酸盐 (KSeCN) 作为一种双功能电解质添加剂.
- 研究KSeCN在调节阴极和阳极接口中的作用,以提高LSB性能.
主要方法:
- 在LSB中,KSeCN被用作电解质添加剂.
- 分析了电极/电解质接口,以了解KSeCN的机制.
- 使用Li-S囊细胞和Li‖Li对称细胞评估了电化学性能.
主要成果:
- KSeCN形成了一个混合的有机-无机阴极电解质接口 (CEI) 和一个无机丰富的固体电解质接口 (SEI).
- 添加剂抑制了聚硫化物穿,提高了转化动力学,并促进了均的Li + 沉积.
- LSBs表现出低容量衰变率 (0.05%/周期超过1000个周期),稳定的囊细胞运行 (~140个周期),并延长对称细胞寿命 (>1000小时).
结论:
- 对于高性能LSB,KSeCN是一种有效的双功能添加剂.
- 通过KSeCN的接口工程解决了LSB技术的关键局限性.
- 这一战略为开发先进的储能解决方案提供了一个有前途的途径.
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