Mesoporous Carbon-Coated Bismuth Nanorods as Anode for Potassium-Ion Batteries
Publication in refereed journal

香港中文大學研究人員

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摘要A new type of a mesoporous carbon-coated bismuth (Bi@C) composite in the form of nanorods is fabricated and used as anode material in a potassiumion battery (KIB). The rod-like Bi core is composed of nanoparticles and confined by a shell of amorphous carbon. The KIB with such Bi@C anode exhibits a high storage capacity of 425 mAh g(-1) at 0.2 A g(-1). The mesoporous Bi@C, with a large surface area and an appropriate pore size is in close contact with the electrolyte and facilitates the diffusion of K thorn ions. The carbon shell soothes the mechanical stresses owing to the volumetric changes of the anode during charging and discharging of the battery, preventing the degradation of active material and delivering a cyclic stability of over 500 cycles. This superior performance demonstrates the importance of a structural design that can offer a new pathway to anode development in KIB as well as in other energy storage devices.
著者Qi SH, Xie X, Peng XW, Ng DHL, Wu MG, Liu QH, Yang JL, Ma JM
期刊名稱physica status solidi (RRL) - Rapid Research Letters
出版年份2019
月份10
卷號13
期次10
出版社WILEY-V C H VERLAG GMBH
文章號碼1900209
國際標準期刊號1862-6254
電子國際標準期刊號1862-6270
語言英式英語
關鍵詞anodes, bismuth, carbon coating, nanorods, potassium-ion batteries
Web of Science 學科類別Materials Science, Multidisciplinary;Physics, Applied;Physics, Condensed Matter;Materials Science;Physics

上次更新時間 2021-21-01 於 00:29