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通过在减少的石墨烯氧化物上固定具有异质接口的双金属化物,实现稳定和快速的/储存

Shu-Ting Zhang^1,2, Wan-Xin Wen^1,2, Pei-Pei Chen^1,2

¹State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing, 100029, P. R. China.

Small (Weinheim an der Bergstrasse, Germany)

|August 23, 2025

概括

嵌入在减少的氧化石墨烯中的-二氧化碳涂层异构结构为可充电的离子和离子电池提供了更好的性能. 这种新材料解决了导电性和稳定性问题,为先进的储能解决方案铺平了道路.

科学领域:

材料科学
电化学
能量储存

背景情况:

过渡金属化物对可充电电池具有前景,因为它们在理论上储存了大量的能量.
挑战包括低导电性,结构降解和缓慢的离子扩散.

研究的目的:

合成一种新的配碳 (NC) 涂层Cu2Se-CoSe2异构,嵌入于减少的石墨烯氧化物 (rGO).
评估其作为离子电池 (LIB) 和离子电池 (SIB) 的阳极材料的性能.

主要方法:

合成Cu2Se-CoSe2@NC@rGO纳米球.
材料属性的表征,包括特定的表面积和异质连接效应.
在LIB和SIB中进行电化学测试以评估容量,循环稳定性和速率性能.

主要成果:

Cu2Se-CoSe2@NC@rGO纳米球具有很高的特定表面积 (207.02 m2 g-1).
异质连接促进了离子和电子的传输,而NC和rGO则提高了结构稳定性.
在LIB中,实现了1161.6 mAh g-1 (200个周期在0.2 A g-1) 和1261.1 mAh g-1 (500个周期在1 A g-1).
在SIB中,维持了422. 4 mAh g-1 (200个周期在0. 1 A g-1).

结论:

不同结构,NC外和rGO矩阵的协同效应显著提高了电化学性能.
作为LIB和SIB的高性能阳极,Cu2Se-CoSe2@NC@rGO具有很好的潜力.

关键词:

阳极材料双金属化物不同结构离子电池离子电池

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