搜索:  
Silica Doped Nano-polyaniline with Endured Electrochemical Energy Storage and the Magnetic Field Effects  
Silica Doped Nano-polyaniline with Endured Electrochemical Energy Storage and the Magnetic Field Effects
资料类型: PDF文件
关键词: Silica  Nano-polyaniline  Electrochemical  Energy  Storage  
资料大小: 643k
所属学科:
来源: 来源网络
简介:
Phosphoric acid doped conductive polyainiline (PANI)/silica nanocomposites usedas supercapacitor electrodes are tested in this article. The nanocomposites with10.0, 20.0, 40.0, and 60.0 wt % silica nanoparticle loadings were synthesizedvia a facile surface initiated polymerization method. The morphology andchemical structure of the nanocomposites were characterized by scanning electronmicroscopy and Fourier transform infrared spectroscopy. The electrochemicalperformances of the nanocomposites were evaluated by cyclic voltammetry,galvanostatic charge–discharge measurement, and electrochemical impedancespectroscopy techniques. The nanocomposites with a loading of 10.0 wt % silicananoparticles displayed an optimum supercapacitive performances with a maximumgravimetric capacitance of 344.1 F/g at a scan rate of 5.0 mV/s (280.3 F/g forPANI nanoparticles) when normalized to the mass of PANI. Meanwhile, a maximumenergy density of 37.4 Wh/kg (34.7 for pure PANI nanoparticles) at a powerdensity of 430 W/kg (415 W/kg for pure PANI) is obtained from thecharge–discharge measurement at a current density of 1.0 A/g. The effect ofelectrolytes on the electrochemical performances was also studied by usingsulfuric acid and sodium sulfate in aqueous solution, respectively. Apseudocapacitance contribution was observed arising from PANI in the acidH2SO4 electrolyte medium whereas most of the capacitancecame from the electric double layer capacitance in the neutralNa2SO4 electrolyte. In addition, external magnetic fieldwas applied onto the nanocomposite electrode, which showed reduced capacitancesdue to the induced positive magnetoresistance. The cyclic stability studiesrevealed a much more superior stability of the nanocomposites than that of purePANI after 500 charge–discharge cycles.
上传人: guhongbo
上传时间: 2016-10-1 11:24:55
下载次数: 0
消耗积分: 0  
立即下载:
1人
1人
1人
友情提示:下载后对该资源进行评论,即可奖励2分。
报告错误:  1.下载无效  2. 资料明显无价值  3. 资料重复存在

相关评论 共有0人发表评论 更多评论
你还没有登录,无法发表评论,请首先 登录 注册
免责声明:本站部分资源由网友推荐,来自互联网,版权属于原版权人,如果不慎侵犯到您的权利,敬请告知,我们会在第一时间撤除。本站中各网友的评论只代表其个人观点,不代表本站同意其观点。