在CoSe2@Ti3C2Tx异构结构中的协同界面工程和空间受限效应,用于高功率和长寿命离子电容器
Yuanhua Xiao1, Yang Kong1, Xuezhao Wang2
1Key Laboratory of Surface & Interface Science and Technology, Zhengzhou University of Light Industry, Zhengzhou 450002, PR China.
Journal of colloid and interface science
|August 7, 2024
概括
这项研究引入了一种新的CoSe2@Ti3C2Tx异构结构,用于增强离子储存. 该材料表现出优异的离子吸附,快速运输和在离子电容器中表现出色.
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
- 纳米技术纳米技术
背景情况:
- 二维 (2D) 异构结构提供了独特的接口特性,以改善能量存储.
- 在最大化异质接口和理解其复杂的相互作用机制方面仍然存在挑战.
研究的目的:
- 为了合成和描述一种新的CoSe2@Ti3C2Tx超晶格状异构结构.
- 研究合成材料的界面特性和离子储存机制.
- 评估异构结构作为阳极材料和离子电容器中的性能.
主要方法:
- 在Ti3C2Tx间层中封闭的CoSe2的溶热合成.
- 密度函数理论 (DFT) 计算用于研究离子吸附和迁移.
- 对CoSe2@Ti3C2Tx材料作为阳极和离子电容器中的电化学测试.
主要成果:
- 与单个组件相比,CoSe2@Ti3C2Tx异构表现出增强的Na+离子吸附和迁移.
- 这种材料的功能是Schottky异构结构,其接口内置的电场促进了离子传输.
- 作为阳极,CoSe2@Ti3C2Tx实现了600.1 mAh/g的高特异容量和出色的速率能力.
- CoSe2@Ti3C2Tx//AC离子电容器表现出高能量/功率密度和长周期寿命 (86.3%在15300个周期内保持).
结论:
- CoSe2@Ti3C2Tx异构是先进的离子储能器件的一个有希望的材料.
- 异构界面上的协同效应显著提高了电化学性能.
- 这项工作突出了基于MXene的异构结构在实际储能应用中的潜力.
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