Three-dimensional porous graphene/polyaniline composites for high-rate electrochemical capacitors

Three-dimensional porous graphene/polyaniline composites for high-rate electrochemical capacitors
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用于高倍率电化学电容器的三维多孔石墨烯/聚苯胺复合材料

DOI:
10.1039/c4ta03639e
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发表时间:
2014-09
影响因子:
11.9
通讯作者:
Gaoquan Shi
Gaoquan Shi
中科院分区:
材料科学2区
文献类型:
--
作者:
Yingru Li;Liang Huang;Chun Li;Gaoquan Shi

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采用电化学共沉积法制备了还原氧化石墨烯(rGO)和聚苯胺(PANI)的三维多孔复合材料,该复合材料具有垂直于集流体表面的孔,可用作电化学电容器的电极材料。这些复合材料显示出更高的面积比电容和大幅度提高倍率性能比那些聚苯胺。典型地,厚度为150 μm的rGO/PANI复合膜表现出高的面积比电容(Ca,67.2 mF cm−2)、小的弛豫时间常数(τ0,316 ms)和良好的电化学稳定性,有望用于制备高速EC。
We report an electrochemical co-deposition method to prepare three-dimensional (3D) porous composites of reduced graphene oxide (rGO) and polyaniline (PANI) with pores vertically oriented on the surfaces of current collectors and used as an electrode material for electrochemical capacitors (ECs). These composites showed much higher areal specific capacitances and greatly improved rate capability than those of PANI. Typically, the rGO/PANI composite film with a thickness of 150 μm exhibited a high areal specific capacitance (Ca, 67.2 mF cm−2), small relaxation time constant (τ0, 316 ms) and good electrochemical stability, promising for the fabrication of a high-rate EC.
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