K+ alkalization promoted Ca2+ intercalation in V2CTx MXene for enhanced Li storage

• 作者: Bingsen Zhang Haibo Li Junnan Chen Ming Lu Wei Zhang Wenjuan Han Xia Zhang Yaopeng Zhang
• 来源期刊: 能源化学
• 年，卷（期）: 2020,（10）
• 页码范围: 358-364
• 页数: 7页
• 语种: 英文

摘要

Although MXenes is highly attractive as anode materials of lithium ion batteries,it sets a bottleneck for higher capacity of the V2CTx MXene due to the limited interlayer space and the derived surface terminations.Herein,the cation intercalation and ion-exchange were well employed to achieve a K+ and Ca2+ intercalated V2CTx MXene.A larger interlayer distance and low F surface terminations were thereof obtained,which accelerates the ion transport and promotes the delicate surface of VaCTx MXene.As a result,a package of enhanced capacity,rate performance and cyclability can be achieved.Furthermore,the ion exchange approach can be extended to other 2D layered materials,and both the interlayer control and the surface modification will be achieved.