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富氮中空炭微球的制备及其用作锂硫电池的电化学性能

张永正 丁立新 詹亮 王艳莉 宋燕

张永正, 丁立新, 詹亮, 王艳莉, 宋燕. 富氮中空炭微球的制备及其用作锂硫电池的电化学性能. 新型炭材料, 2017, 32(4): 297-303.
引用本文: 张永正, 丁立新, 詹亮, 王艳莉, 宋燕. 富氮中空炭微球的制备及其用作锂硫电池的电化学性能. 新型炭材料, 2017, 32(4): 297-303.
ZHANG Yong-zheng, DING Li-xin, ZHAN Liang, WANG Yan-li, SONG Yan. N-doped hollow carbon nanospheres as sulfur hosts for high performance Li-S batteries. New Carbon Mater., 2017, 32(4): 297-303.
Citation: ZHANG Yong-zheng, DING Li-xin, ZHAN Liang, WANG Yan-li, SONG Yan. N-doped hollow carbon nanospheres as sulfur hosts for high performance Li-S batteries. New Carbon Mater., 2017, 32(4): 297-303.

富氮中空炭微球的制备及其用作锂硫电池的电化学性能

基金项目: 国家自然科学基金(51472086,51002051);上海市自然科学基金(12ZR1407200);中国科学院炭材料重点实验室开放课题资助项目(KLCMKFJJ1703).
详细信息
    作者简介:

    张永正,博士研究生,E-mail:1529028919@qq.com

    通讯作者:

    詹亮,教授,E-mail:zhanliang@ecust.edu.cn

  • 中图分类号: TQ127.1+1

N-doped hollow carbon nanospheres as sulfur hosts for high performance Li-S batteries

Funds: National Natural Science Foundation of China (51472086,51002051);Natural Science Foundation of Shanghai City (12ZR1407200);CAS Key Laboratory of Carbon Materials (KLCMKFJJ1703).
  • 摘要: 分别以多巴胺和正硅酸乙酯为碳源和硅源,先采用一步法合成出球形C@SiO2复合材料,然后通过化学刻蚀制得一种表面积达875 m2·g-1、表面富含N原子的中空炭微球(N-HCS)。N-HCS独特的纳米结构可以有效地抑制硫在充放电过程中的体积膨胀和聚硫化物的穿梭效应,同时表面掺杂的氮能够提高活性物质的导电性,进而提高正极材料的循环稳定性和大倍率性能。结果表明,该碳/硫复合材料的在0.2 C电流密度下的首次放电容量达1 179 mAh·g-1;经100次反复充放电后,其放电容量仍可保持在540 mAh·g-1;具有较好的大电流倍率性能,在电流密度为1 C和2 C时,其可逆放电容量可分别稳定在343 mAh·g-1和247 mAh·g-1
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出版历程
  • 收稿日期:  2017-05-28
  • 录用日期:  2017-08-31
  • 修回日期:  2017-08-01
  • 刊出日期:  2017-08-28

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