能源化学(英文版)

能源化学(英文版) ›› 2020, Vol. 49 ›› Issue (10): 136-146.DOI: 10.1016/j.jechem.2020.01.010

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N-doped carbon nanotubes formed in a wide range of temperature and ramping rate for fast sodium storage

Ruchao Weia, Man Huanga, Wenzhe Mab, Baojuan Xia, Zhenyu Fenga, Haibo Lic, Jinkui Fengd, Shenglin Xionga   

  1. a Key Laboratory of Colloid and Interface Chemistry,Ministry of Education,School of Chemistry and Chemical Engineering,and State Key Laboratory of Crystal Materials,Shandong University,Jinan 250100,Shandong,China;
    b Department of Science and Technology of Shandong Province,Jinan 250100,Shandong,China;
    c School of Chemistry and Chemical Engineering,Liaocheng University,Liaocheng 252059,Shandong,China;
    d Key Laboratory for Liquid-Solid Structural Evolution & Processing of Materials(Ministry of Education),Shandong University,Jinan 250061,Shandong,China
  • 收稿日期:2019-11-27 修回日期:2020-01-08 出版日期:2020-10-15 发布日期:2020-12-18
  • 通讯作者: Wenzhe Ma, Shenglin Xiong
  • 基金资助:
    The authors gratefully acknowledge the financial supports provided by the National Natural Science Foundation of China(21871164),the Taishan Scholar Project Foundation of Shandong Province(ts20190908),the Natural Science Foundation of Shandong Province(ZR2019MB024),and Young Scholars Program of Shandong University(2017WLJH15).

N-doped carbon nanotubes formed in a wide range of temperature and ramping rate for fast sodium storage

Ruchao Weia, Man Huanga, Wenzhe Mab, Baojuan Xia, Zhenyu Fenga, Haibo Lic, Jinkui Fengd, Shenglin Xionga   

  1. a Key Laboratory of Colloid and Interface Chemistry,Ministry of Education,School of Chemistry and Chemical Engineering,and State Key Laboratory of Crystal Materials,Shandong University,Jinan 250100,Shandong,China;
    b Department of Science and Technology of Shandong Province,Jinan 250100,Shandong,China;
    c School of Chemistry and Chemical Engineering,Liaocheng University,Liaocheng 252059,Shandong,China;
    d Key Laboratory for Liquid-Solid Structural Evolution & Processing of Materials(Ministry of Education),Shandong University,Jinan 250061,Shandong,China
  • Received:2019-11-27 Revised:2020-01-08 Online:2020-10-15 Published:2020-12-18
  • Contact: Wenzhe Ma, Shenglin Xiong
  • Supported by:
    The authors gratefully acknowledge the financial supports provided by the National Natural Science Foundation of China(21871164),the Taishan Scholar Project Foundation of Shandong Province(ts20190908),the Natural Science Foundation of Shandong Province(ZR2019MB024),and Young Scholars Program of Shandong University(2017WLJH15).

摘要： Herein,nickel@nitrogen-doped carbon nanotubes (Ni@NCNTs) are prepared by a simple and reliable method with Ni-based complex as single-source precursor.Significantly,the formation of CNTs is not susceptible to the calcination temperature and ramping rate and Ni@NCNTs can be attained from 430 to 900℃ in an inert atmosphere.Then they are the first time to be applied as the anode material for sodium-ion batteries.The presence of Ni nanoparticles (NPs) facilitates the solid electrolyte interface film over the anode surface and improves the capacity retention of the host material,especially at the high rates.Furthermore,Na+ diffusion is reinforced after the introduction of Ni NPs.Ni@NCNTs obtained at 500℃ (Ni@NCNTs-500) exhibit the best capacity retention and rate capability.Kinetics analyses demonstrate the faster electron transportation and ion diffusion than others prepared at other temperatures.The surficial capacitance storage favors the fast electrochemistry kinetics.It delivers a high specific capacity (192 mA h g-1 at 0.5 A g-1),excellent cycling stability (103 mA h g-1 after 10,000 cycles at 10 A g-1),and outstanding high-rate capability up to 20 A g-1 (118 mA h g-1).The related full cells confirm a high energy density of 140 Wh kg-1 at 38.16 W kg-1 and 44.27 W h kg-1 at 762 W kg-1.

关键词: Nitrogen-doped carbon nanotubes, Ni nanoparticles, Anode, Sodium-ion batteries

Abstract: Herein,nickel@nitrogen-doped carbon nanotubes (Ni@NCNTs) are prepared by a simple and reliable method with Ni-based complex as single-source precursor.Significantly,the formation of CNTs is not susceptible to the calcination temperature and ramping rate and Ni@NCNTs can be attained from 430 to 900℃ in an inert atmosphere.Then they are the first time to be applied as the anode material for sodium-ion batteries.The presence of Ni nanoparticles (NPs) facilitates the solid electrolyte interface film over the anode surface and improves the capacity retention of the host material,especially at the high rates.Furthermore,Na+ diffusion is reinforced after the introduction of Ni NPs.Ni@NCNTs obtained at 500℃ (Ni@NCNTs-500) exhibit the best capacity retention and rate capability.Kinetics analyses demonstrate the faster electron transportation and ion diffusion than others prepared at other temperatures.The surficial capacitance storage favors the fast electrochemistry kinetics.It delivers a high specific capacity (192 mA h g-1 at 0.5 A g-1),excellent cycling stability (103 mA h g-1 after 10,000 cycles at 10 A g-1),and outstanding high-rate capability up to 20 A g-1 (118 mA h g-1).The related full cells confirm a high energy density of 140 Wh kg-1 at 38.16 W kg-1 and 44.27 W h kg-1 at 762 W kg-1.

Key words: Nitrogen-doped carbon nanotubes, Ni nanoparticles, Anode, Sodium-ion batteries