吉首大学学报：自然科学版
吉首大學學報：自然科學版
길수대학학보：자연과학판
Journal of Jishou University(Natural Science Edition)
2012年
2期
93-98
,共6页
聚吡咯%氧化石墨%复合材料%电化学电容
聚吡咯%氧化石墨%複閤材料%電化學電容
취필각%양화석묵%복합재료%전화학전용
polyprrole%graphite oxide%composite materials%electrochemical capacitance
以改进的Hummer法制备氧化石墨（GO）,用原位聚合法合成聚吡咯/氧化石墨（Ppy/GO）复合物,运用CV和CP法测试电化学性能,并以XRD,FTIR,SEM分析材料的结构形貌.结果表明：（1）Ppy/GO复合物具有较好的电化学电容性能.当电流密度为0.5A.g-1时,复合物在1mol.L-1 H2SO4溶液中的比电容可达358.93F.g-1.（2）Ppy/GO复合物较Ppy有更好的循环稳定性和倍率充放电性能.当扫描速率分别为10,20,50mV.s-1时,复合物电极的循环伏安曲线均呈现出良好的矩形特征,并能保持一致性,而在相同扫描速率下,Ppy的循环伏安曲线不稳定;当电流密度分别为1,2,5A.g-1时,复合物的比电容分别达204.71,130.82,60.21F.g-1,高于相同条件下Ppy的178.05,123.89,46.52F.g-1.以上说明将聚吡咯与氧化石墨形成复合物有利于改善聚吡咯的电化学电容性能.
以改進的Hummer法製備氧化石墨（GO）,用原位聚閤法閤成聚吡咯/氧化石墨（Ppy/GO）複閤物,運用CV和CP法測試電化學性能,併以XRD,FTIR,SEM分析材料的結構形貌.結果錶明：（1）Ppy/GO複閤物具有較好的電化學電容性能.噹電流密度為0.5A.g-1時,複閤物在1mol.L-1 H2SO4溶液中的比電容可達358.93F.g-1.（2）Ppy/GO複閤物較Ppy有更好的循環穩定性和倍率充放電性能.噹掃描速率分彆為10,20,50mV.s-1時,複閤物電極的循環伏安麯線均呈現齣良好的矩形特徵,併能保持一緻性,而在相同掃描速率下,Ppy的循環伏安麯線不穩定;噹電流密度分彆為1,2,5A.g-1時,複閤物的比電容分彆達204.71,130.82,60.21F.g-1,高于相同條件下Ppy的178.05,123.89,46.52F.g-1.以上說明將聚吡咯與氧化石墨形成複閤物有利于改善聚吡咯的電化學電容性能.
이개진적Hummer법제비양화석묵（GO）,용원위취합법합성취필각/양화석묵（Ppy/GO）복합물,운용CV화CP법측시전화학성능,병이XRD,FTIR,SEM분석재료적결구형모.결과표명：（1）Ppy/GO복합물구유교호적전화학전용성능.당전류밀도위0.5A.g-1시,복합물재1mol.L-1 H2SO4용액중적비전용가체358.93F.g-1.（2）Ppy/GO복합물교Ppy유경호적순배은정성화배솔충방전성능.당소묘속솔분별위10,20,50mV.s-1시,복합물전겁적순배복안곡선균정현출량호적구형특정,병능보지일치성,이재상동소묘속솔하,Ppy적순배복안곡선불은정;당전류밀도분별위1,2,5A.g-1시,복합물적비전용분별체204.71,130.82,60.21F.g-1,고우상동조건하Ppy적178.05,123.89,46.52F.g-1.이상설명장취필각여양화석묵형성복합물유리우개선취필각적전화학전용성능.
Absract ： The electrochemical capacitive property of Polypyrrole/Graphite Oxide（Ppy/GO） composites was studied.Firstly,graphite oxide was prepared by a improved Hummer’s method,and the composites of Polypyrrole/Graphite Oxide was synthesized by in-situ chemical polymerizing method.Then using CV,CP method,the as-prepared composites ’ electrochemical capacitive property was measured,and using XRD,FTIR,SEM,its structure was characterized.The result shows that（1） the product presents a higher special capacitance,which is 358.93F.g-1 at 0.5A.g-1 in 1mol.L-1 H2SO4 solution;（2） the cyclic stability and rate charge-discharge property of the composites is better than those of Ppy,when the scanning rate is 10,20,50 mV.s-1,the cyclic voltammograms of composites can keep consistently a good rectangle shape,and at a series of current density of 1,2,5A.g-1,the corresponding special capacitance of the composite is 204.71,130.82,60.21F.g-1,respective,which is higher than polyrrole ’ s 178.05,123.89,46.52F.g-1 under the same series of current density.The result indicates that it can effectively improve polypyrrole ’ s rate property by in situ chemically polymerizing polypyrrole and graphite oxide to form Ppy/GO composite.
