Ultralow-Expansion Lithium Metal Composite Anode via Gradient Framework Design

被引:34
作者
Liu, Yucheng [1 ]
Yuan, Boyu [1 ]
Sun, Chuang [1 ,2 ]
Lu, Yuhao [3 ]
Lin, Xiaoping [3 ]
Chen, Maohua [3 ]
Xie, Yuansen [3 ]
Zhang, Shanqing [2 ]
Lai, Chao [1 ]
机构
[1] Jiangsu Normal Univ, Sch Chem & Mat Chem, Xuzhou 221116, Jiangsu, Peoples R China
[2] Griffith Univ, Sch Environm & Sci, Ctr Clean Environm & Energy, Gold Coast Campus, Southport, Qld 4222, Australia
[3] Ningde Amperex Technol Ltd, Ningde 352100, Fujian, Peoples R China
基金
中国国家自然科学基金;
关键词
3D hosts; dual-gradient architectures; lithium anodes; low volume expansion; rigidity and flexibility; LAYER; SEPARATORS;
D O I
10.1002/adfm.202202771
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Improving the stability of lithium (Li) anodes is critical for the safety and reliability of Li metal batteries. Developing a 3D conductive Li host is suggested as one of the most promising strategies in this context, especially for suppressing the pulverization of the electrode. However, the material consistency and volume expansion of the electrodes (<15%) represent significant challenges for their applications in commercial pouch cells. In this work, dual-gradient architecture, combining rigidity and flexibility through the synergistic effect of silver wires and carbon nanotubes, is fabricated by a facile suction filtration method. This unique network shows a volume expansion of only 5.4%, outperforming all previously reported composite Li anodes. In addition, the online digital holography clearly monitors the preferential deposition of metallic Li at the lithiophilic layer. Consequently, the present gradient host effectively prevents the deposition of metallic Li at the electrode/separator interface, resulting in excellent cycling stability in both symmetric and full cells.
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页数:8
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