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Updated: Sep 12, 2025

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诱导多硫化物转化为Cu2S/CuS的耐用存量效应

Canpei Wang¹, Mengting Zheng¹, Tiefeng Liu^1,2

¹College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310058, P. R. China.

Journal of the American Chemical Society

|August 4, 2025

概括

铜纳米集群 (<1 nm) 通过控制硫化铜的相变,增强聚硫化物转化和硫利用以实现稳定循环,从而实现高效的硫电池.

科学领域:

材料科学
电化学
纳米技术

背景情况:

聚硫化物 (PSs) 转换效率是硫电池的一个关键限制.
铜纳米结构在PS固中的作用及其动态演变尚未得到充分理解.

研究的目的:

阐明铜纳米集团在调节硫电池性能方面的尺寸控制电化学机制.
了解铜纳米结构的动态演变及其在循环过程中与PS的相互作用.

主要方法:

操作分析观察铜纳米结构的动态变化.
铜纳米集群及其衍生硫化物的合成和表征.
在硫电池中对Cu薄膜 (S@C-Cu) 阴极进行电化学测试.

主要成果:

铜纳米集群 (<1 nm) 动态调节Cu2S-CuS相变,使得可逆的硫氧化还原化学.
一个双相结构 (Cu2S外部/CuS内部) 加快了硫再生,抑制了PSs的穿.
该S@C-Cu阴极实现了超稳定的循环 (1164.9mAhg-1在3000次循环后) 和高面积容量 (3.68mAhcm-2).
尺寸效应驱动的相位演变机制可用于其他金属硫化物.

结论:

铜纳米集群大小决定了相位演变,对于优化硫电池性能至关重要.
这项研究为实际储能提供了硫电化学的原子层面见解.
这些发现为设计高性能硫电池提供了新的策略.

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