Towards the upper bound of electrochemical performance of ACNT@polyaniline arrays as supercapacitors
Towards the upper bound of electrochemical performance of ACNT@polyaniline arrays as supercapacitors
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DOI：
10.1039/c1ee01989a
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发表时间：
2012-02-01
影响因子：
32.5
通讯作者：
Chen, De
中科院分区：
文献类型：
--
作者：
Huang, Fan;Chen, De
在金属箔上作为超级电容器排列的定向碳纳米管@聚苯胺(ACNT@PANI)的合理设计策略已经被证明朝着比电容的上限，即高比表面积和纳米厚度的PANI，良好的离子可及性和低的接触电阻。研究了ACNT@PANI纳米电极阵列的结构，并将其与表面氧化还原反应、电子和离子传输以及超级电容器的能量和功率密度相关联。PANI薄膜厚度是影响PANI比电容的最重要参数，优化后的PANI薄膜比电容接近最大理论值(接近1100Fg(-1))。组装了一台超级电容器样机，并进行了实际应用。与传统的双极板超级电容器相比，该器件具有更高的比电容、更高的比功率和更低的内阻，但成本和体积更小，这可能为更智能的储能装置设计提供机会。
A strategy in the rational design of the aligned carbon nanotube @ polyaniline (ACNT@PANI), arrayed on metal foils as supercapacitors, has been demonstrated towards the upper bound of the specific capacitance, namely a high surface area and nanometre thickness of PANI, good accessibility of ions and a low contact resistance. The structure of ACNT@PANI nanoelectrode arrays was investigated and correlated to the surface redox reaction, electronic and ionic transport and thus to the energy and power density of the supercapacitors. The thickness of the PANI film on each ACNT was found the most important parameter, which was optimized to achieve the specific capacitance (similar to 1100 F g(-1)) of PANI close to the maximum theoretic value. A prototype supercapacitor was assembled, and a practical application was demonstrated. This device shows a higher specific capacitance, a higher specific power and a lower internal resistance but reduced cost and volume than conventional two-plate supercapacitors, which may provide opportunities for a smarter design of energy storage devices.