Li-Ca Alloy Composite Anode with Ant-Nest-Like Lithiophilic Channels in Carbon Cloth Enabling High-Performance Li Metal Batteries

Zihao Wang; Yuchi Liu; Jianxiong Xing; Zhicui Song; Aijun Zhou; Wei Zou; Fu Zhou; Jingze Li

doi:10.34133/2022/9843093

Research (Jan 2022)

Li-Ca Alloy Composite Anode with Ant-Nest-Like Lithiophilic Channels in Carbon Cloth Enabling High-Performance Li Metal Batteries

Zihao Wang,
Yuchi Liu,
Jianxiong Xing,
Zhicui Song,
Aijun Zhou,
Wei Zou,
Fu Zhou,
Jingze Li

Affiliations

Zihao Wang: School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu 611731, China; Yangtze Delta Region Institute (Huzhou), University of Electronic Science and Technology of China, Huzhou 313001, China
Yuchi Liu: School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu 611731, China; Yangtze Delta Region Institute (Huzhou), University of Electronic Science and Technology of China, Huzhou 313001, China
Jianxiong Xing: School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu 611731, China; Yangtze Delta Region Institute (Huzhou), University of Electronic Science and Technology of China, Huzhou 313001, China
Zhicui Song: School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu 611731, China; Yangtze Delta Region Institute (Huzhou), University of Electronic Science and Technology of China, Huzhou 313001, China
Aijun Zhou: School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu 611731, China; Yangtze Delta Region Institute (Huzhou), University of Electronic Science and Technology of China, Huzhou 313001, China
Wei Zou: Research and Development Center, Tianqi Lithium Co., Ltd., Chengdu 610093, China
Fu Zhou: Research and Development Center, Tianqi Lithium Co., Ltd., Chengdu 610093, China
Jingze Li: School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu 611731, China; Yangtze Delta Region Institute (Huzhou), University of Electronic Science and Technology of China, Huzhou 313001, China

DOI: https://doi.org/10.34133/2022/9843093
Journal volume & issue: Vol. 2022

Abstract

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Constructing a three-dimensional (3D) multifunctional hosting architecture and subsequent thermal infusion of molten Li to produce advanced Li composite is an effective strategy for stable Li metal anode. However, the pure liquid Li is difficult to spread across the surface of various substrates due to its large surface tension and poor wettability, hindering the production and application of Li composite anode. Herein, heteroatomic Ca is doped into molten Li to generate Li-Ca alloy, which greatly regulates the surface tension of the molten alloy and improves the wettability against carbon cloth (CC). Moreover, a secondary network composed of CaLi2 intermetallic compound with interconnected ant-nest-like lithiophilic channels is in situ formed and across the primary scaffold of CC matrix by infiltrating molten Li-Ca alloy into CC and then cooling treatment (LCAC), which has a larger and lithiophilic surface to enable uniform Li deposition into interior space of the hybrid scaffold without Li dendrites. Therefore, LCAC exhibits a long-term lifespan for 1100 h under a current density of 5 mA cm-2 with fixed areal capacity of 5 mAh cm-2. Remarkably, full cells paired with practical-level LiFePO4 cathode of 2.45 mAh cm-2 deliver superior performance.

Published in Research

ISSN: 2096-5168 (Print); 2639-5274 (Online)
Publisher: American Association for the Advancement of Science (AAAS)
Country of publisher: United States
LCC subjects: Science
Website: https://spj.science.org/journal/research

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