期刊
ACS NANO
卷 14, 期 7, 页码 9117-9124出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsnano.0c04366
关键词
sodium-ion battery; anode; bismuth; antimony; 3D arrays
类别
资金
- National Natural Science Foundation of China [51872192, 51672182, 51772197]
- Thousand Young Talents Plan
- Jiangsu Natural Science Foundation [BK20180002]
- Natural Science Foundation of the Jiangsu Higher Education Institutions of China [19KJA170001, 17KJA430013]
- Priority Academic Program Development (PAPD) of Jiangsu Higher Education Institutions
- U.S. Department of Energy (DOE), Office of Energy Efficiency and Renewable Energy, Vehicle Technologies Office
- DOE Office of Science by UChicago Argonne, LLC [DE-AC02-06CH11357]
Sodium-ion batteries have attracted widespread attention for cost-effective and large-scale electric energy storage. However, their practical deployment has been largely retarded by the lack of choice of efficient anode materials featuring large capacity and electrochemical stability and robustness. Herein, we report a durian-inspired design and template-free fabrication of a robust sodium anode based on triangular pyramid arrays of Bi0.75Sb0.25 alloy electrodeposited on Cu substrates. The Bi0.75Sb0.25 arrays exhibit an appreciable electrochemical robustness for sodium storage, sustaining a reversible capability 335 mAh g(-1) at a high rate of 2.5 A g(-1) and 87% of the initial capacity over 2000 cycles. We further demonstrate the applicability of the Bi0.75Sb0.25 array anode in sodium full cells by pairing it with a Na3V2(PO4)(3)/C cathode. This full cell achieves a high specific energy of 203 Wh kg(-1) (based on both active electrodes). Such an enhanced performance is attributed to the thorny-durian-like architecture and bimetallic alloy composition. The pyramid tip induces ion enrichment for rapid charge-transfer reaction, while the alloy design reduces the electrode volume swelling for stable Na cycling.
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