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首页> 外文会议>PowerMEMS 2013 >High resolution electrochemical micro-capacitors based on oxidized multi-walled carbon nanotubes
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High resolution electrochemical micro-capacitors based on oxidized multi-walled carbon nanotubes

机译：基于氧化多壁碳纳米管的高分辨率电化学​​微电容器

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This study reports the preparation of all-solid-state micro-supercapacitors in planar interdigitated configuration based on MWCNTs via the electrophoretic deposition technique. The carbon nanotubes were functionalized with carboxylic groups via a HNO_3 concentric solution in order to prevent their agglomeration and obtain a stable aqueous suspension, and to add a pseudo-capacitance contribution to the predominant double-layer capacitance. The electrode materials were characterized in a 3 electrode configuration, and the micro-devices in a two-electrode configuration using electrochemical impedance spectroscopy and cyclic voltammetry in 0.5 M sulfuric acid and a gel of PVA-H_3PO_4-H_2O doped by SiWA electrolyte. Spatial resolution down to 10 μm was obtained for the device with specific capacitance up to 1.8 mF.cm~(-2) in electrolyte based PVA and a high power density of 1.28 W.cm~(-2) in 0.5 M H_2SO_4 electrolyte.
机译：本研究报告了通过电泳沉积技术基于MWCNT的平面间型型配置的全固态微型超级电容器的制备。通过HNO_3同心溶液用羧基官能化碳纳米管，以防止它们的附聚并获得稳定的水性悬浮液，并为主要的双层电容添加伪电容贡献。电极材料的特征在于3电极构型，以及使用电化学阻抗光谱和0.5M硫酸中的循环伏安法和由Siwa电解质掺杂的PVA-H_3PO_4-H_2O凝胶的双电极配置中的微器件。在电解质的PVA中为具有比1.8mF.cm〜（-2）的特定电容的装置获得了空间分辨率，在0.5MH_2SO_4电解质中为1.28W.cm〜（-2）的高功率密度。

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