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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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氧化剂对磺化石墨烯负载聚苯胺复合材料结构与电化学性能的影响
DOI: 10.3724/SP.J.1105.2012.12014, PP. 980-987
Keywords: 聚苯胺,磺化石墨烯,界面聚合,超级电容器
Abstract:
以磺化石墨烯(sGNS)为基板材料,通过界面聚合方法制备出不同分级结构磺化石墨烯负载聚苯胺(sGNS/PANI)复合材料,并系统研究了氧化剂类型对复合材料的化学组成、形貌结构和超级电容特性的影响.结果显示,过硫酸铵为氧化剂合成的复合材料中PANI的产率和氧化程度最高,其形貌呈现出sGNS垂直生长PANI纳米短棒阵列结构,PANI的共轭程度和结晶性均较高,从而赋予复合材料高的比电容(497.3Fg-1),以及良好的倍率特性和循环稳定性(2000次循环后比电容仅损失5.7%).当以三氯化铁为氧化剂时,复合材料中PANI的得率很低,并在sGNS表面形成较薄的包覆层,此时复合材料的比电容最低(228.5Fg-1),但充放电循环性能较好(2000次循环后比电容的保持率为87.4%).当氧化剂为高锰酸钾时,复合材料中PANI以团聚态颗粒无规堆积在sGNS表面,PANI以无定型结构存在,其比电容虽然较高(419.6Fg-1),但其倍率特性和充放电循环性能较差(2000次循环后比电容损失19.9%).
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