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双硫化物辅助有机多硫化物阴极设计使硫电池的动力学得到改善

Ruihua Li¹, Haoteng Wu¹, Haiwei Wu^1,2

¹College of Bioresources Chemical and Materials Engineering Shaanxi University of Science and Technology Xi'an 710021 China.

|January 15, 2026

概括

研究人员开发了一种用于硫电池 (LSB) 的新型有机多硫化物阴极,以克服穿效应. 这种新材料显著提高了LSB的容量保留和电化学性能.

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
储能储能储能储能储能储能

背景情况:

硫电池 (LSB) 面临由于聚硫化物穿效应和反应动力学不佳的局限性.
开发具有高硫载荷和提高导电性的阴极对于推进LSB技术至关重要.

研究的目的:

为高性能LSBs合成一种新的有机聚硫化物复合阴极.
为了解决穿效应,并提高LSB的电化学稳定性.

主要方法:

通过元素硫和四甲基二硫化物 (TMTD) 之间的基态反应合成线性有机聚硫化物 (TMTD-S).
复合TMTD-S与导电碳 (ECP600JD) 和制造纸质电极.
研究的电化学性能,包括容量保留,速率能力和离子扩散系数.

主要成果:

在0.2C的250个循环后,TMTD-24S@ECP600JD阴极显示了79.1%的容量保留,超过了传统的S@ECP600JD (14.1%).
TMTD-54S@ECP600JD阴极 (88重量%硫) 在0.2C下提供了941mAhg-1的初始容量,在200个循环后保持82.1%.
证明了高速率性能,在2°C时达到638.3 mAh g−1,并观察到最高的离子扩散系数.

结论:

新的有机聚硫化物阴极有效地减轻了穿效应,并改善了LSB中的动力学.
TMTD-54S@ECP600JD复合材料显示出作为高级LSB应用的高性能阴极材料的巨大潜力.

关键词:

有高硫含量的装载.运动学的动力学.硫电池是硫电池的一种.有机硫化物有机硫化物基于纸张的电极是基于纸张的电极.甲基thiuram二硫化物四甲基二硫化物

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