应用化学 ›› 2020, Vol. 37 ›› Issue (2): 198-204.DOI: 10.11944/j.issn.1000-0518.2020.02.190236

• 研究论文 • 上一篇    下一篇

杯[4]醌/N掺杂的无定形碳纳米纤维复合材料储锂性能

崔华敏a,掌学谦b,胡攀登a,闫冰a,黄苇苇a*(),郭文锋a*()   

  1. 燕山大学 a环境与化学工程学院 河北 秦皇岛 066004
    b亚稳材料制备技术与科学国家重点实验室 河北 秦皇岛 066004
  • 收稿日期:2019-09-05 接受日期:2019-11-19 出版日期:2020-02-01 发布日期:2020-02-06
  • 通讯作者: 黄苇苇,郭文锋
  • 基金资助:
    国家自然科学基金(21875206,21403187)和河北省自然科学基金(B2019203487)资助

Calix[4]quinone/N-Doped Amorphous Carbon Nanofibers Composites for Lithium-Ion Batteries

CUI Huamina,ZHANG Xueqianb,HU Pandenga,YAN Binga,HUANG Weiweia*(),GUO Wenfenga*()   

  1. aSchool of Environmental and Chemical Engineering,Yanshan University,Qinhuangdao,Hebei 066004,China
    bState Key Laboratory of Metastable Materials Science and Technology,Yanshan University,Qinhuangdao,Hebei 066004,China
  • Received:2019-09-05 Accepted:2019-11-19 Published:2020-02-01 Online:2020-02-06
  • Contact: HUANG Weiwei,GUO Wenfeng
  • Supported by:
    Supported by the National Natural Science Foundation of China(No.21875206,No.21403187), and the Natural Science Foundation of Hebei Province(No.B2019203487)

摘要:

生物质甲壳素来源丰富、廉价易得、N含量高且具有纤维结构,经高温碳化即可获得导电性良好的多孔碳材料。 杯[4]醌(Calix[4]quinone,C4Q)的理论比容量高达447 mA·h/g,但它在传统电解液中的高溶解性和导电性差限制了其在锂电池中的实际应用。 为了解决上述问题,本文以甲壳素为原料,经高温处理制得了N掺杂的无定形碳纳米纤维材料(NACF),并利用其多孔结构吸附C4Q,制备出C4Q/NACF(质量比为1:1)复合材料。 该复合材料在0.1 C电流密度下,首圈放电比容量为426 mA·h/g,循环100圈后比容量为213 mA·h/g,甚至在1 C电流密度下,C4Q/NACF复合材料仍有188 mA·h/g的放电比容量。 实验结果表明,利用NACF碳材料固载C4Q的方法可以提高C4Q锂离子电池的循环稳定性和导电性。

关键词: 甲壳素, NACF, 杯[4]醌, 固载, 锂离子电池

Abstract:

Although calix[4]quinone (C4Q) has a theoretical specific capacity up to 447 mA·h/g, its high solubility in liquid electrolytes and low conductivity make it impractical in lithium-ion batteries (LIBs). In order to solve these problems, N-doped amorphous carbon nanofibers (NACF) were obtained by high-temperature carbonization with chitin as raw material, and were used to adsorb C4Q to prepare C4Q/NACF (mass ratio is 1:1) composite material. The as-assembled LIBs delivered an initial discharge capacity of 426 mA·h/g, and maintained 213 mA·h/g after 100 cycles at 0.1 C. Even at a high rate of 1 C, the capacity could still reach 188 mA·h/g. These experimental results show that the performance of LIBs is effectively improved by using NACF biomass carbon to immobilize C4Q.

Key words: chitin, N-doped amorphous carbon nanofibers, calix[4]quinone, immobilization, lithium-ion batteries