期刊
ACS APPLIED MATERIALS & INTERFACES
卷 13, 期 15, 页码 17629-17638出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.1c02186
关键词
dendrite growth; bacterial cellulose; potassium metal anode; carbon nanofiber paper; potassiophilic surface
资金
- National Key Research and Development Program of China [2019YFE0118800]
A highly potassiophilic carbon nanofiber paper was successfully fabricated through a facile, scalable, and environmentally-friendly biosynthesis method, serving as an excellent host for K metal anodes. The uniform K nucleation and stable plating/stripping performance of this carbon nanofiber paper led to a stable cycling of 1400 h and a low overpotential of 45 mV, outperforming other carbon hosts without complicated structure engineering. This research provides a promising approach for realizing dendrite-free K metal anodes and high-performance potassium-ion batteries.
Potassium-metal batteries are attractive candidates for low-cost and large-scale energy storage systems due to the abundance of potassium. However, K metal dendrite growth as well as volume expansion of K metal anodes on cycling have significantly hindered its practical applications. Although enhanced performance has been reported using carbon hosts with complicated structure engineering, they are not suitable for mass production. Herein, a highly potassiophilic carbon nanofiber paper with abundant oxygen-containing functional groups on the surface and a 3D interconnected network architecture is fabricated through a facile, scalable, and environmental-friendly biosynthesis method. As a host for K metal anode, uniform K nucleation and stable plating/stripping performance are demonstrated, with a stable cycling of 1400 h and a low overpotential of 45 mV, which are much better than all carbon hosts without complicated structure engineering. Moreover, full cells pairing the carbon nanofiber paper/K composite anodes with K4Fe(CN)(6) cathodes exhibit excellent cycle stability and rate capability. The results provide a promising way for realizing dendrite-free K metal anodes and high-performance potassium-ion batteries.
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