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多孔炭复合V2O3纳米材料用于锂离子电容器的研究

任晓龙 艾德生 吕瑞涛 康飞宇 黄正宏

任晓龙, 艾德生, 吕瑞涛, 康飞宇, 黄正宏. 多孔炭复合V2O3纳米材料用于锂离子电容器的研究[J]. 新型炭材料. doi: 10.1016/S1872-5805(21)60070-7
引用本文: 任晓龙, 艾德生, 吕瑞涛, 康飞宇, 黄正宏. 多孔炭复合V2O3纳米材料用于锂离子电容器的研究[J]. 新型炭材料. doi: 10.1016/S1872-5805(21)60070-7
Ren Xiaolong, Ai Desheng, Lv Ruitao, Kang Feiyu, Huang Zheng-Hong. Porous V2O3@C Composite Anodes with Pseudocapacitive Properties for Lithium-ion Capacitors[J]. NEW CARBON MATERIALS. doi: 10.1016/S1872-5805(21)60070-7
Citation: Ren Xiaolong, Ai Desheng, Lv Ruitao, Kang Feiyu, Huang Zheng-Hong. Porous V2O3@C Composite Anodes with Pseudocapacitive Properties for Lithium-ion Capacitors[J]. NEW CARBON MATERIALS. doi: 10.1016/S1872-5805(21)60070-7

多孔炭复合V2O3纳米材料用于锂离子电容器的研究

doi: 10.1016/S1872-5805(21)60070-7
基金项目: 国家自然科学基金 (51672151)
详细信息
    作者简介:

    任晓龙,博士研究生. E-mail:18801291089@163.com

    通讯作者:

    艾德生,教授. E-mail:ai_desh@mail.tsinghua.edu.cn

    黄正宏,教授. E-mail:zhhuang@tsinghua.edu.cn

Porous V2O3@C Composite Anodes with Pseudocapacitive Properties for Lithium-ion Capacitors

Funds: National Nature Science Foundation of China (51672151)
More Information
  • 摘要: 以NaCl为模板、结合冷冻干燥技术合成了多孔碳复合V2O3纳米材料,通过研究其用作锂离子电池负极材料的动力学特征,并与商业化活性炭构建锂离子电容器,研究其电化学性能。结果表明,多孔炭复合V2O3纳米材料具有赝电容行为,所构建的锂离子电容器同时具有高能量、高功率和长效循环稳定性,是一种很有前景的锂离子电容器负极材料。
  • 图  1  三维碳复合 V2O3材料的电化学性能:(a) 不同扫描速度下的CV曲线,(b) 根据峰电流和扫描速率计算的b值,(c) 动力学分析,(d) 不同扫速下电容和扩散反应对容量的贡献比例。

    Figure  1.  Electrochemical performance of the 3D porous V2O3@C anode. (a) CV curves of V2O3@C at various scanning rates. (b) Determination of the b value using the relationship between peak current and scan rate. (c) Quantification of the capacitive and diffusion charge storage in V2O3@C anode. (d) Contribution ratio of diffusion and capacitive capacities at different scan rates.

    图  2  (a) 活性炭的SEM图谱,(b) 活性炭氮吸附/脱附曲线和相应的孔径分布图,(c) 活性炭倍率性能,(d) 5 A/g电流密度下的循环性能。

    Figure  2.  (a) Typical SEM image of commercial AC. (b) Nitrogen adsorption-desorption isotherm with the corresponding pore size distribution curve (the inset picture) of the commercial AC. (c) Rate performance of commercial AC at various current densities. (b) Cycle performance of commercial AC at a current density of 5 A/g.

    图  3  V2O3@C基锂离子电容器的电化学性能:(a) 器件充电过程中正负极电势变化的示意图 (b) 不同正负极质量配比性能图,(c)不同扫描速度下的CV图,(d) 不同电流密度下的恒流充放电曲线,(e) V2O3@C基锂离子电容器和其他锂离子电容器性能对比图,(f) 1 A/g电流密度下的循环性能。

    Figure  3.  Electrochemical performance of AC//V2O3@C. (a) Schematic of voltage changes of AC//V2O3@C during the charge process. (b) Ragone plots of AC//V2O3@C at different mass ratio of two electrodes. (c) CV curves at various scanning rates from 2 mV/s to 20 mV/s. (d) Charge/discharge profiles at various current densities from 0.1A/g to 1A/g. (e) Ragone plots of AC//V2O3@C and other reported LICs. (f) Cycle performance at a current density of 1 A/g.

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出版历程
  • 收稿日期:  2020-01-01
  • 修回日期:  2020-01-01
  • 网络出版日期:  2021-06-11

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