Zeng Shao-Zhong, Yao Yuechao, Huang Lin, Wu Hongliang, Peng Biaolin, Zhang Qi, Li Xiaohua, Yu Liang, Liu Shiyu, Tu Wenxuan, Lan Tongbin, Zeng Xierong, Zou Jizhao
Shenzhen Key Laboratory of Special Functional Materials &, Shenzhen Engineering Laboratory for Advance Technology of Ceramics, College of Materials Science and Engineering, Shenzhen University, Shenzhen, 518060, P. R. China.
Key Laboratory of Optoelectronic Devices and Systems, of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen, 518060, P. R. China.
Chemistry. 2018 Feb 6;24(8):1988-1997. doi: 10.1002/chem.201705211. Epub 2018 Jan 9.
Hollow carbon nanospheres (HCNs) with specific surface areas up to 2949 m g and pore volume up to 2.9 cm g were successfully synthesized from polyaniline-co-polypyrrole hollow nanospheres by carbonization and CO activation. The cavity diameter and wall thickness of HCNs can be easily controlled by activation time. Owing to their large inner cavity and enclosed structure, HCNs are desirable carriers for encapsulating sulfur. To better understand the effects of pore characteristics and sulfur contents on the performances of lithium-sulfur batteries, three composites of HCNs and sulfur are prepared and studied in detail. The composites of HCNs with moderate specific surface areas and suitable sulfur content present a better performance. The first discharge capacity of this composite reaches 1401 mAh g at 0.2 C. Even after 200 cycles, the discharge capacity remains at 626 mAh g .
通过碳化和CO活化，成功地从聚苯胺-共-聚吡咯中空纳米球合成了比表面积高达2949 m²/g、孔体积高达2.9 cm³/g的中空碳纳米球（HCNs）。HCNs的腔直径和壁厚可以通过活化时间轻松控制。由于其大的内腔和封闭结构，HCNs是用于封装硫的理想载体。为了更好地理解孔特征和硫含量对锂硫电池性能的影响，制备并详细研究了三种HCNs与硫的复合材料。具有适度比表面积和合适硫含量的HCNs复合材料表现出更好的性能。该复合材料在0.2 C下的首次放电容量达到1401 mAh/g。即使经过200次循环，放电容量仍保持在626 mAh/g。
