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碳化/氧化协同作用的异构结构在层层的碳中,以提高硫电池的性能

Dong Mao¹, Yifan Fu¹, Junjie Ba¹

¹Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education), State Key Laboratory of High Pressure and Superhard Materials, College of Physics, Jilin University, Changchun 130012, China.

Journal of colloid and interface science

|April 22, 2025

概括

在碳矩阵中的碳化碳/氧化物异构结构通过抑制聚硫化物穿效应来提高硫电池的性能. 这种新型材料可实现高容量和长期稳定性,用于先进的能量存储.

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 (Li-S) 电池在理论上具有高的能量密度,但面临着挑战.
硫的绝缘性和多硫化物的穿效应阻碍了实际应用.

研究的目的:

开发一种新材料来克服Li-S电池的局限性.
通过协同的异构结构设计,提高Li-S电池的性能和稳定性.

主要方法:

通过拓转换合成嵌入碳基质 (VC/V2O3@C) 中的碳碳化碳/氧化异构结构.
使用现场拉曼光谱来研究聚硫化物转换的表征.
使用开发的复合材料对Li-S电池进行电化学测试.

主要成果:

该VC/V2O3@C复合物有效吸附多硫化物,并表现出强烈的氧化还原活性.
现场拉曼光谱证实了加速的聚硫化物转化和抑制的穿效应.
-S电池实现了高放电容量 (在0.5°C时1281mAhg-1) 和出色的循环稳定性 (在1200个循环中每周期衰减0.045%).
在苛刻的条件下获得了令人印象深刻的面积容量 (高硫负载,稀薄的电解质).

结论:

协同作用的VC/V2O3@C异构结构显著提高了Li-S电池的性能.
这种方法为开发下一代高能量密度电池提供了一个有前途的战略.
这项研究展示了一种改善Li-S电池效率和寿命的新方法.

关键词:

异构结构就是异构结构.在现场拉曼光谱学.硫电池是硫电池的一种.聚硫化物多硫化物穿效应穿效应穿效应

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