Fabrication of polyaniline/urchin-like mesoporous TiO2 spheres nanocomposite and its application in supercapacitors
Fabrication of polyaniline/urchin-like mesoporous TiO2 spheres nanocomposite and its application in supercapacitors
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DOI：
10.1016/j.electacta.2015.02.088
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发表时间：
2015-05-01
影响因子：
6.6
通讯作者：
Wang, Shiyong
中科院分区：
文献类型：
--
作者：
Wang, Huihui;Ma, Li;Wang, Shiyong
合成了一种新型聚苯胺/海胆状介孔TiO 2微球纳米复合材料（PANI/UMTS），作为超级电容器的电极材料。该复合材料以UMTS为载体材料，经γ-氨丙基三乙氧基硅烷（APTES）改性后，通过接枝聚合将聚苯胺组装到其表面。复合材料的结构和形态表征表明，具有良好的机械强度和高比表面积的UMTS可以改善PANI的形态，提高其稳定性。因此，PANI/UMTS具有优异的电化学性能。在0.7A g（1）的电流密度下达到422 F g（1）的高比电容，并且当电流密度增加20倍时可以实现73%的高电容保持率。此外，在充放电500次循环后，其初始比电容几乎可以保持100%。所有结果表明，聚苯胺/UMTS是一种有前途的电极材料，高性能的超级电容器。(C)2015爱思唯尔有限公司版权所有。
A novel nanocomposite of polyaniline/urchin-like mesoporous TiO2 spheres (PANI/UMTS) has been synthesized as electrode material for supercapacitors. In the composite, UMTS are used as support material and modified by gamma-aminopropyltriethoxysilane (APTES), PANI is assembled onto the surface of it via grafting polymerization. Characterization of structure and morphology of the composite indicates that the UMTS with good mechanical strength and high specific surface area can improve the morphology of PANI and increase its stability. Consequently, PANI/UMTS exhibits excellent electrochemical performance. A high specific capacitance of 422 F g (1) is reached at a current density of 0.7 A g (1), and a high capacitance retention ratio of 73% as the current density is increased by 20 times can be achieved. In addition, almost 100% of its initial specific capacitance can be retained after charge/discharge for 500 cycles. All results suggest that the PANI/UMTS is a promising electrode material for highperformance supercapacitors. (C) 2015 Elsevier Ltd. All rights reserved.