首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  免费   0篇
  国内免费   3篇
物理学   3篇
  2018年   1篇
  2017年   2篇
排序方式: 共有3条查询结果,搜索用时 8 毫秒
1
1.
通过电化学的方法在钛网上制备了聚吡咯与石墨烯的复合物薄膜,其过程是先在钛网上通过自组装干燥膜法附着上石墨烯氧化物膜,而后采用电化学还原的方法原位还原制备得到石墨烯膜,随后加入吡咯单体,再通过电化学聚合的方法在石墨烯的表面生长聚吡咯,得到的聚吡咯开始以颗粒的形式存在,而后随着聚合的进行得到了链状的聚吡咯.得到的复合膜有高的比表面积和导电性,可以作为电极活性材料用于超级电容器中提供赝电容,结果表明,复合膜作为电极材料的超级电容器拥有高的性能,比电容达400 F/g,并且电极的充放电稳定性高,5000次复合膜充放电循环后比电容还能保留82%,说明该材料适合于超级电容器.  相似文献   
2.
本文制备的三维多孔结构FeC2O4/石墨烯复合材料,在不添加粘结剂时可作为超级电容器电极. 复合材料由大孔石墨烯和微介孔FeC2O4组成. 通常,水分解电压为1.23 V,对于以水系为电解液的不对称超级电容器,电压窗口限制为2 V. 当以FeC2O4/rGO水凝胶作为负极,以纯rGO水凝胶作为正极时,在KOH(1.0 mol/L)电解质中不对称超级电容器电压窗为1.7 V,在中性Na2SO4(1.0 mol/L)电解质中可达到2.5 V,相应地,组装的非对称电容器性能优异,能量密度为59.7 Wh/kg. 通过将具有微介孔结构的金属氧化物与石墨烯相结合,制备在不添加导电剂和粘合剂时直接用于组装不对称超级电容器的电极材料.  相似文献   
3.
We studied the oxidation resistance of graphene-coated Cu surface and its layer dependence by directly growing monolayer graphene with different multilayer structures coexisted, di-minishing the influence induced by residue and transfer technology. It is found that the Cu surface coated with the monolayer graphene demonstrate tremendous difference in oxidation pattern and oxidation rate, compared to that coated with the bilayer graphene, which is considered to be originated from the strain-induced linear oxidation channel in monolayer graphene and the intersection of easily-oxidized directions in each layer of bilayer graphene, respectively. We reveal that the defects on the graphene basal plane but not the boundaries are the main oxidation channel for Cu surface under graphene protection. Our finding indi-cates that compared to putting forth efforts to improve the quality of monolayer graphene by reducing defects, depositing multilayer graphene directly on metal is a simple and effective way to enhance the oxidation resistance of graphene-coated metals.  相似文献   
1
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号