中国物理B ›› 2021, Vol. 30 ›› Issue (12): 128201-128201.doi: 10.1088/1674-1056/ac1f07

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Morphological effect on electrochemical performance of nanostructural CrN

Zhengwei Xiong(熊政伟)1,†, Xuemei An(安雪梅)4,†, Qian Liu(刘倩)1, Jiayi Zhu(朱家艺)1, Xiaoqiang Zhang(张小强)2, Chenchun Hao(郝辰春)1,‡, Qiang Yang(羊强)3, Zhipeng Gao(高志鹏)3, and Meng Zhang(张盟)1   

  1. 1 Joint Laboratory for Extreme Conditions Matter Properties, Southwest University of Science and Technology, Mianyang 621010, China;
    2 Institute of Electronic Engineering, China Academy of Engineering Physics(CAEP), Mianyang 621900, China;
    3 Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang 621900, China;
    4 Affiliated Hospital, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China
  • 收稿日期:2021-05-17 修回日期:2021-08-10 接受日期:2021-08-19 出版日期:2021-11-15 发布日期:2021-12-02
  • 通讯作者: Chenchun Hao E-mail:haochenchun@swust.edu.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 11904299, U1930124, and 11804312) and China Academy of Engineering Physics (CAEP) Foundation (Grant No. 2018AB02).

Morphological effect on electrochemical performance of nanostructural CrN

Zhengwei Xiong(熊政伟)1,†, Xuemei An(安雪梅)4,†, Qian Liu(刘倩)1, Jiayi Zhu(朱家艺)1, Xiaoqiang Zhang(张小强)2, Chenchun Hao(郝辰春)1,‡, Qiang Yang(羊强)3, Zhipeng Gao(高志鹏)3, and Meng Zhang(张盟)1   

  1. 1 Joint Laboratory for Extreme Conditions Matter Properties, Southwest University of Science and Technology, Mianyang 621010, China;
    2 Institute of Electronic Engineering, China Academy of Engineering Physics(CAEP), Mianyang 621900, China;
    3 Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang 621900, China;
    4 Affiliated Hospital, Chengdu University of Traditional Chinese Medicine, Chengdu 611137, China
  • Received:2021-05-17 Revised:2021-08-10 Accepted:2021-08-19 Online:2021-11-15 Published:2021-12-02
  • Contact: Chenchun Hao E-mail:haochenchun@swust.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 11904299, U1930124, and 11804312) and China Academy of Engineering Physics (CAEP) Foundation (Grant No. 2018AB02).

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摘要： Size and morphology are critical factors in determining the electrochemical performance of the supercapacitor materials, due to the manifestation of the nanosize effect. Herein, different nanostructures of the CrN material are prepared by the combination of a thermal-nitridation process and a template technique. High-temperature nitridation could not only transform the hexagonal Cr2O3 into cubic CrN, but also keep the template morphology barely unchanged. The obtained CrN nanostructures, including (i) hierarchical microspheres assembled by nanoparticles, (ii) microlayers, and (iii) nanoparticles, are studied for the electrochemical supercapacitor. The CrN microspheres show the best specific capacitance (213.2 F/g), cyclic stability (capacitance retention rate of 96% after 5000 cycles in 1-mol/L KOH solution), high energy density (28.9 Wh/kg), and power density (443.4 W/kg), comparing with the other two nanostructures. Based on the impedance spectroscopy and nitrogen adsorption analysis, it is revealed that the enhancement arised mainly from a high-conductance and specific surface area of CrN microspheres. This work presents a general strategy of fabricating controllable CrN nanostructures to achieve the enhanced supercapacitor performance.

关键词: CrN, supercapacitors, metal nitride, nanostructures

Abstract: Size and morphology are critical factors in determining the electrochemical performance of the supercapacitor materials, due to the manifestation of the nanosize effect. Herein, different nanostructures of the CrN material are prepared by the combination of a thermal-nitridation process and a template technique. High-temperature nitridation could not only transform the hexagonal Cr2O3 into cubic CrN, but also keep the template morphology barely unchanged. The obtained CrN nanostructures, including (i) hierarchical microspheres assembled by nanoparticles, (ii) microlayers, and (iii) nanoparticles, are studied for the electrochemical supercapacitor. The CrN microspheres show the best specific capacitance (213.2 F/g), cyclic stability (capacitance retention rate of 96% after 5000 cycles in 1-mol/L KOH solution), high energy density (28.9 Wh/kg), and power density (443.4 W/kg), comparing with the other two nanostructures. Based on the impedance spectroscopy and nitrogen adsorption analysis, it is revealed that the enhancement arised mainly from a high-conductance and specific surface area of CrN microspheres. This work presents a general strategy of fabricating controllable CrN nanostructures to achieve the enhanced supercapacitor performance.

Key words: CrN, supercapacitors, metal nitride, nanostructures

中图分类号:  (Electrochemical capacitors; supercapacitors)

  • 82.47.Uv
79.60.Jv (Interfaces; heterostructures; nanostructures) 91.60.Ed (Crystal structure and defects, microstructure)