Topological design of ultrastrong MXene paper hosted Li enables ultrathin and fully flexible lithium metal batteries

Authors

Cao Wang
Zi Zheng
Yong Feng
Huan Ye
Fei Cao
Zaiping Guo, University of WollongongFollow

RIS ID

143406

Publication Details

Wang, C., Zheng, Z., Feng, Y., Ye, H., Cao, F. & Guo, Z. (2020). Topological design of ultrastrong MXene paper hosted Li enables ultrathin and fully flexible lithium metal batteries. Nano Energy, 74

Abstract

© 2020 Elsevier Ltd Ultrathin Li metal anode with a thickness of <30 >μm in combination with state-of-art cathodes could promise high-energy lithium metal batteries (LMBs). Here, we report a facile spin steaming technology to design the topological structures of Ti3C2Tx MXene film as Li host by mixing a trace of cellulose nanofiber (CNF). The interlocked topological microstructure between MXene sheets and microspheres-forming assisted by CNF contributes greatly to enhanced mechanical strength and flexibility of the resultant MXene@CNF film. More importantly, the MXene sheets with abundant Li nucleation sites shows a desirable affinity for Li. As a result, a flexible, ultrathin (~25 μm), and self-supporting MXene@CNF/Li composite anode without rampant Li dendrites, and with favorable cycling stability with high real capacity of Li is realized. The as-obtained hybrid Li anode matches with flexible self-supporting LiFePO4/cellulose nanofiber (LFP@CNF) cathodes to construct fully flexible LMBs with high specific capacity and outstanding stability.