3D花形空心MXene@MoS2异构结构用于快速储存
Kaihang She1, Ying Huang1, Wanqing Fan1
1MOE Key Laboratory of Material Physics and Chemistry Under Extraordinary Conditions, School of Chemistry and Chemical Engineering, Northwestern Polytechnical University, Xi'an 710072, China.
Journal of colloid and interface science
|November 23, 2023
概括
为离子电池阳极合成了层次的MXene@MoS2花样结构. 这种新型材料具有出色的容量和稳定性,为先进的储能应用铺平了道路.
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:
- 开发高性能阳极对于大型离子电池 (SIB) 应用至关重要.
- 挑战包括实现快速电子传输和长期循环稳定性.
研究的目的:
- 为SIB阳极合成一种新的MXene@MoS2异构结构.
- 通过解决材料聚合和体积扩张问题来提高电化学性能.
主要方法:
- 使用PMMA微球模板合成的等级花样MXene结构.
- 通过水热反应固定的MoS2纳米板.
- 3D多孔空洞结构和电化学性能的表征.
主要成果:
- MXene@MoS2异构结构呈现出一个3D多孔空洞结构.
- 在0.2 A/g时达到682.1 mAh g-1的特定容量.
- 经过1000个循环以5A/g的速度后,证明了494.4 mAh g-1的可逆容量.
- 完整的SIB细胞在80个循环后保持456.2 mAh g-1的0.5 A/g.
结论:
- 合成的MXene@MoS2复合物有效地减轻了MoS2聚合和电极体积膨胀.
- 强大的异质接口促进了快速的电子转移和增强的动力学.
- 由于其优越的容量和稳定性,该材料显示出用于高性能SIB应用的巨大潜力.
相关概念视频
02:42Ionic Crystal Structures
14.4K
Ionic crystals consist of two or more different kinds of ions that usually have different sizes. The packing of these ions into a crystal structure is more complex than the packing of metal atoms that are the same size.
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...
Most monatomic ions behave as charged spheres, and their attraction for ions of opposite charge is the same in every direction. Consequently, stable structures for ionic compounds result (1) when ions of one charge are surrounded by as many ions as possible of the opposite...
14.4K
01:25MOS Capacitor
802
A Metal-Oxide-Semiconductor (MOS) capacitor is a fundamental structure used extensively in semiconductor device technology, particularly in the fabrication of integrated circuits and MOSFETs (metal-oxide-semiconductor field-effect transistors). The MOS capacitor consists of three layers: a metal gate, a dielectric oxide, and a semiconductor substrate.
The metal gate is typically made from highly conductive materials such as aluminum or polysilicon. Beneath the metal gate lies a thin layer of...
The metal gate is typically made from highly conductive materials such as aluminum or polysilicon. Beneath the metal gate lies a thin layer of...
802