Fast fabrication of NiO@graphene composites for supercapacitor electrodes: Combination of reduction and deposition.
Fast fabrication of NiO@graphene composites for supercapacitor electrodes: Combination of reduction and deposition.
复制标题
DOI：
10.1016/j.matdes.2016.07.072
复制
发表时间：
2016-11-05
影响因子：
8.4
通讯作者：
Che J
中科院分区：
文献类型：
--
作者：
Hui X;Qian L;Harris G;Wang T;Che J
石墨烯基无机复合材料由于其无机纳米粒子取代导电高分子材料附着在石墨烯片上而具有更高的电容量和良好的容量保持率，因而受到越来越多的关注。本文报道了一种快速制备NiO@graphene复合修饰电极的方法。通过该方法，NiO/石墨烯电化学活性材料的制备和电极的修饰可以同时进行，而传统方法是分别进行的。而且可以很好地解决活性物质在电极表面附着力差的问题。引入到薄膜中的NiO颗粒表现出由Ni（II）/Ni（III）的可逆法拉第转变引起的赝电容行为，并大大提高了电极的电容。随着NiO含量的增加，在循环伏安扫描过程中可以获得高度还原的石墨烯，导致电极电容增加。当电流密度为5A/g时，电极的最高比电容可达1258 F/g。
Graphene-based inorganic composites have been attracting more and more attention since the attachment of inorganic nanoparticles instead of conducting polymeric materials to graphene sheets turns out higher capacitances and good capacity retention. Here we report a fast fabrication method to prepare NiO@graphene composite modified electrodes for supercapacitors. By this method, preparation of electrochemical active materials of NiO/graphene and modification of the electrode can be simultaneously performed, which is achieved separately by traditional method. Moreover, the problem of poor adhesion of active materials on the surface of the electrode can be well solved. The NiO particles introduced to the films exhibit pseudocapacitive behavior arising from the reversible Faradaic transitions of Ni(II)/Ni(III) and greatly improve the capacitance of the electrodes. With the increase in NiO content, highly reduced graphene can be obtained during cyclic voltammetry sweeping, leading to the increase in the electrode capacitance. The highest specific capacitance of the constructed electrodes can reach 1258 F/g at a current density of 5 A/g.
登录
查看更多内容
影响因子：
8.4
作者：
Li, Yuqi;Pan, Diyuan;Wang, Tingmei
通讯作者：
Wang, Tingmei
影响因子：
2.9
作者：
Liu, Sheng;Ou, Junfei;Yang, Shengrong
通讯作者：
Yang, Shengrong
影响因子：
8.4
作者：
Patil, Swati J.;Lokhande, Chandrakant D.
通讯作者：
Lokhande, Chandrakant D.
用于高性能超级电容器的介孔、分层核/壳结构ZnCo2O4/MnO2纳米锥森林
影响因子：
17.6
作者：
Qiu, Kangwen;Lu, Yang;Luo, Yongsong
通讯作者：
Luo, Yongsong
影响因子：
3.7
作者：
Ramesha, Ganganahalli K.;Sampath, Srinivasan
通讯作者：
Sampath, Srinivasan