Three‐Dimensional Hierarchical Framework Loaded with Lithiophilic Nanorod Arrays for High‐Performance Lithium‐Metal Anodes. Issue 20 (2nd September 2020)

• Record Type: Journal Article
• Authors: Qi, Yanyuan; Lin, Lin; Jian, Zelang; Qin, Kaiyan; Tan, Yuxuan; Zou, Yujie; Chen, Wen; Li, Fujun
• Is Part Of: ChemElectroChem. Volume 7:Issue 20(2020)
• Page Start: 4201
• Page End: 4207
• Publication Date: 2020-09-02
• Subjects: lithium metal anode -- lithiophilicity -- dendrite suppression -- hierarchical structure -- 3D framework; Electrochemistry -- Periodicals; 541.37
• DOI: 10.1002/celc.202000858
• Languages: English
• ISSNs: 2196-0216

Abstract

Abstract: Although the highest theoretical specific capacity and lowest redox potential make lithium metal anodes essential for next‐generation high‐energy batteries, the infinite volume changes and uncontrollable Li dendrites severely restrict their application. Herein, the 3D hierarchical framework (3DHF) loaded with lithiophilic nanorod arrays on interwoven carbon fibers is constructed as a host to stabilize the Li metal anode. With cooperation of the lithiophilicity and the capillary force of the nanorod arrays, molten Li easily wraps the surface of the nanorods to form 3DHF−Li composite anodes. The void spaces and channels among the nanorods may provide a buffer space for Li stripping/plating to relieve the volume changes. In addition, the enlarged specific surface area reduces the local current density to homogenize Li deposition and suppress Li dendrites. The 3DHF−Li anodes exhibit improved cycle stability and rate capability in both symmetric cells and full cells, providing references for the development of Li composite anodes. Abstract : Hip hip array ! A 3D hierarchical framework loaded with lithiophilic nanorod arrays is constructed as a host for Li metal anodes. The nanorod arrays supply abundant Li deposition sites, cooperating with the void spaces and channels to suppress volume expansion and promote non‐dendritic Li plating.