基于CVD直接生长的碳纳米管/MnO2高效超级电容器研究
李莉，陈李慧，谢非，钱维金，董长昆
温州大学微纳结构与光电器件研究所
HIGH-PERFORMANCE MWNT/MnO2 SURPERCAPACITOR BASED ON CVD DIRECT GROWTH TECHNIQUE
LI Li，CHEN Li-hui，XIE Fei，QIANWei-jin，DONG Chang-kun
Institute of Micro Structure and Optoelectronic Devices，Wenzhou University

摘要：通过化学气相沉积（CVD）法在泡沫镍基底直接生长多壁碳纳米管（MWNTs），采用水热法在MWNT上原位沉积MnO2，合成MnO2-MWNT-Ni foam 超级电容器复合电极。相比MnO2-Ni foam 电极，由于优越的结构和导电性能，MnO2-MWNT-Ni foam 复合电极有更好的电化学反应活性，电荷传递电阻从0.411 Ω下降至0.054 Ω。三电极系统下，MnO2-MWNT-Ni foam 复合结构的比电容为771.5 F/g，1 000 个循环后的保持率为102.7%，展现了电容特性和循环稳定性。MnO2-MWNT-Ni foam 复合电极成本低、比电容大、功率密度和能量密度高、循环寿命长，在超级电容器和其他电池的制备中具有优势。

关键词：碳纳米管,  超级电容器,  直接生长,  化学气相沉积,  二氧化锰,  水热合成法    
Abstract：In this work，multi-walled carbon nanotubes（MWNTs）are grown directly on nickel foam substrates without extra catalyst deposition by chemical vapor deposition（CVD）technique，followed by in situ deposition of manganese dioxide from the facile hydrothermal method to prepare the MnO2-MWNT-Ni foam electrode for supercapacitor application. Due to superior structural and electronic conductivity properties，the MnO2-MWNT-Ni foam electrode greatly improved the electrochemical reaction properties comparing with MnO2- Ni Foam electrode，and the charge transfer resistance dropped from 0.411 Ω to 0.054 Ω. In the three-electrode system，the MnO2-MWNT-Ni foam electrode presented a high specific capacitance of 771.5 F/g with capacitance retention of 102.7% after 1 000 cycles，demonstrated excellent capacitance performance and long-term stability. The MnO2-MWNT-Ni foam composite exhibits superior properties of lowcost，high specific capacitance，high energy density & power density，and long-term cyclic stability，which is promising for supercapacitor and other battery applications.

Key words：carbon nanotube    supercapacitor    direct growth    Chemical Vapor Deposition    MnO2    hydro thermal method
    
作者简介: 李莉（1991-），女人，陕西省渭源人，硕士研究生，研究方向为低维材料能源器件

引用本文: 李莉，陈李慧，谢非，钱维金，董长昆. 基于CVD直接生长的碳纳米管/MnO2高效超级电容器研究[J]. 真空与低温, 2017, 23(3): 148-.
LI Li，CHEN Li-hui，XIE Fei，QIANWei-jin，DONG Chang-kun. HIGH-PERFORMANCE MWNT/MnO2 SURPERCAPACITOR BASED ON CVD DIRECT GROWTH TECHNIQUE. journal1, 2017, 23(3): 148-.

文章来源：《真空与低温》杂志2017年23卷3期

刊出日期：2017-06-28

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