钒
离子
电极
阳极
电导率
电阻率和电导率
材料科学
环境压力
化学
电化学
热力学
物理化学
冶金
有机化学
电气工程
物理
工程类
作者
Guangbo Chen,Juncheng Lv,Yanfeng Han,Qi Zhang,Yang Liu,Jihui Lang,Xiaoxin Wu,Jingshu Wang,Ming Lu,Junkai Zhang
标识
DOI:10.1016/j.jcis.2022.11.105
摘要
Pressure, analogous with temperature and composition, is other meaningful variant for tuning the structure-activity properties of layered materials. In-situ high-pressure electrical results discover that Vanadium based MXene (V2CTx MXene) conductivity is increased by one order of magnitude from ambient to 10.4 GPa, and then the conductivity is still fixated on meeting growth as pressure releasing. Increased carrier concentration due to denser compactness is the most important factor in improving sample conductivity. Furthermore, abundant of V2CTx samples after preloading different pressures are prepared by the mean of the double-anvil hydraulic press for the first time, and results of increased conductivity were reproduced at ambient conditions. The first-principles calculation of V2C (non-functional group), V2CF, V2CO, and V2COH explains for the lattice expansion by tracing emotion of different function groups upon decompression. Electrochemical results obtain that once forming V2CTx MXene anode rapidly quenched from 2.0 GPa in hydraulic press shows better performance, obviously weakening electric polarization and increasing Li-ion transport rate due to its proper interlaminar densification and improved conductivity. This work opens up a new, simple, and universal approach to develop MXene materials with superior electrical and electrochemical properties, as well as expanding the potential applications for energy storage.
科研通智能强力驱动
Strongly Powered by AbleSci AI