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用于Na-S电池的高性能硫/碳阴极由Sn化In的电催化作用启用₂S₃

Jianhui Zhu¹, Linchao Zeng², Yumin Song³

¹College of Materials Science and Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, PR China; College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen 518060, PR China.

Journal of colloid and interface science

|May 29, 2023

概括

研究人员开发了一种用于室温硫 (RT Na-S) 电池的新型Sn化In2S3/S/C阴极. 这种阴极通过减轻聚硫化物穿和提高反应动力学来提高性能,为实际应用铺平了道路.

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:

室温硫 (RT Na-S) 电池提供低成本和高容量,但受到聚硫化物 (NaPS) 穿效应和缓慢动力学的影响.
这些挑战限制了RT Na-S电池的实际应用和性能.

研究的目的:

设计和合成一种先进的阴极材料,以克服RT Na-S电池的局限性.
提高RT Na-S电池的电化学性能,特别是容量和循环稳定性.

主要方法:

磁电子喷射被用来制造一种化的In2S3/S/C阴极.
现场电化学阻抗光谱 (EIS) 用于分析电荷转移和离子扩散.
进行了理论计算,以了解由于Sn兴奋剂的电子结构修改.

主要成果:

用Sn合的In2S3/S/C阴极在0.1 A g-1.1下实现了1663.5 mAh g-1的高可逆容量.
观察到卓越的循环性能,在50个循环后保留了902.9 mAh g-1.
兴奋剂加速了电荷转移,促进了Na+扩散,并减少了能量带间隙,增强了电化学转换.

结论:

在In2S3中通过Sn兴奋剂调整电子结构是增强电催化活性的有效策略.
开发的阴极材料显著提高了RT Na-S电池中硫阴极的性能.
这项工作提供了一种可靠的方法,通过催化剂修改来提高RT Na-S电池的性能.

关键词:

在现场电化学阻抗光谱学.在室温下使用的Na-S电池.穿效应穿效应穿效应含有的 In(2)S(3) 加入了.减少硫的反应反应

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