Three-dimensional carbon material as stable host for dendrite-free lithium metal anodes. (1st April 2019)

• Record Type: Journal Article
• Authors: Xu, Ying; Wang, Liping; Jia, Weishang; Yu, Yanan; Zhang, Ruya; Li, Tao; Fu, Xianbiao; Niu, Xiaobin; Li, Jingze; Kang, Yijin
• Is Part Of: Electrochimica acta. Volume 301(2019)
• Page Start: 251
• Page End: 257
• Publication Date: 2019-04-01
• Subjects: 3-D carbon materials -- Dendrite -- Lithium metal anodes; Electrochemistry -- Periodicals; Electrochemistry, Industrial -- Periodicals; 541.37
• DOI: 10.1016/j.electacta.2019.01.114
• Languages: English
• ISSNs: 0013-4686

Abstract

Abstract: For its low redox potential (−3.04 V vs. SHE) and the high theoretical specific capacity (3860 mA h g −1 ), lithium metal is regarded as one of the most promising anode materials for next-generation batteries. However, the poor cycling performances and serious safety hazards caused by the inhomogeneous lithium deposition severely hinder the practical applications of Li metal batteries. Here, we introduce 3-D carbon materials which are subsequently in-situ transformed into LiC6 as electrode scaffold. Such lithiophilic 3-D structure with a high specific surface area enables dendrite-free deposition of Li metal, resulting in a high coulombic efficiency up to 97% after 300 cycles. We propose that besides 3-D structure, LiC6 intermediate may be responsible for the dendrite-free growth of Li, offering a potential new strategy to design high performance anodes for Li metal batteries.