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0D-2D多功能双金属MOF衍生-MXene异质连接,用于高面积容量的硫电池

Jinxin Wang¹, Yongzheng Zhang¹, Zixin Chen¹

¹State Key Laboratory of Chemical Engineering, School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China.

Journal of colloid and interface science

|September 15, 2024

概括

这项研究引入了一种新的0D-2D异构催化剂 (FeCo@Ti3C2),用于高性能硫 (Li-S) 电池. 这种先进的材料增强了聚硫化物转化和离子输送,为商业化铺平了道路.

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:

硫 (Li-S) 电池具有高的特定容量,但在高速率的聚硫化物转化和离子输送方面面临挑战.
这些局限性阻碍了Li-S电池技术的商业可行性.

研究的目的:

开发一种用于提高Li-S电池性能的新型催化剂.
为了解决缓慢的聚硫化物转化和离子传输的局限性.

主要方法:

在现场通过静电吸附在二维 (2D) MXene (FeCo@Ti3C2) 上合成零维 (0D) 双金属金属有机框架 (MOF) 衍生物.
使用合成的0D-2D异构催化剂制造和测试Li-S电池.

主要成果:

FeCo@Ti3C2催化剂有效地防止MXene堆叠,并为聚硫化物提供双催化位点.
2D MXene结构促进了离子快速扩散.
0D-2D异质连接表现出极好的高速容量 (703 mAh g-1在4 C) 和持续的高负载性能 (100 个循环后为5.5 mAh cm-2).

结论:

开发的多功能0D-2D异质连接催化剂显示了推动高效Li-S电池商业化发展的巨大潜力.
这种方法为克服Li-S电池技术的关键挑战提供了一个有希望的策略.

关键词:

分配策略分配策略.硫电池的使用方法低温行为低温行为基于MXene的异构结构.

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