Spherical nano-Sb@C composite as a high-rate and ultra-stable anode material for sodium-ion batteries

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题名:	Spherical nano-Sb@C composite as a high-rate and ultra-stable anode material for sodium-ion batteries
作者:	鄭芳怡;Zhang, Ning;Liu, Yongchang;Lu, Yanying;Han, Xiaopeng;Cheng, Fangyi;Chen, Jun
贡献者:	地球科學學院大氣科學學系
关键词:	Anodes;Atomic/Molecular Structure and Spectra;Biomedicine;Biotechnology;Chemical synthesis;Chemistry and Materials Science;Condensed Matter Physics;Discharge;Electrochemical analysis;Electrochemistry;Electrode materials;Materials Science;Nanoparticles;Nanotechnology;Porous media;Pyrolysis;Rechargeable batteries;Research Article;Sodium;Sodium-ion batteries;Spray pyrolysis;喷雾热分解法;正极材料;球形;纳米颗粒复合材料;超稳定;钠离子电池;锑含量;高倍率
日期:	2015-10-01
上传时间:	2026-04-21 14:08:06 (UTC+8)
出版者:	Tsinghua University Press;Beijing: Tsinghua University Press
摘要:	摘要： An aerosol spray pyrolysis technique is used to synthesize a spherical nano-SbC composite. Instrumental analyses reveal that the micro-nanostructured composite with an optimized Sb content of 68.8 wt% is composed of ultra-small Sb nanoparticles （10 nm） uniformly embedded within a spherical porous C matrix （denoted as 10-SbC）. The content and size of Sb can be controlled by altering the concentration of the precursor. As an anode material of sodium-ion batteries, 10-SbC provides a discharge capacity of 435 mAh.g^-1 in the second cycle and 385 mAh.g^-1 （a capacity retention of 88.5%） after 500 cycles at 100 mAh.g^-1. In particular, the electrode exhibits an excellent rate capability （355, 324, and 270 mAh.g^-1 at 1,000, 2,000, and 4,000 mAh.g^-1, respectively）. Such a high-rate performance for the Sb-C anode has rarely been reported. The remarkable electrochemical behavior of 10-SbC is attributed to the synergetic effects of ultra-small Sb nanoparticles with an uniform distribution and a porous C framework, which can effectively alleviate the stress associated with a large volume change and suppress the agglomeration of the pulverized nanoparticles during prolonged charge-discharge cycling. 其他題名： Nano Res 其他題名： Nano Research 出版者： Beijing: Tsinghua University Press 出版日期： 2015-10-01 出處： Nano Research, 2015-10, Vol.8 (10), p.3384-3393 版權： Tsinghua University Press and Springer-Verlag Berlin Heidelberg 2015 版權： Nano Research is a copyright of Springer, (2015). All Rights Reserved. 識別號： ISSN: 1998-0124 識別號： EISSN: 1998-0000 識別號： DOI: 10.1007/s12274-015-0838-3
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