期刊
APPLIED SURFACE SCIENCE
卷 441, 期 -, 页码 466-473出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2018.02.059
关键词
High rate lithium ion batteries; High rate supercapacitors; Graphene foam; Vanadium oxide
类别
资金
- National Science Foundation [1611060]
- GLEAMM Spark Fund
- Div Of Electrical, Commun & Cyber Sys
- Directorate For Engineering [1611060] Funding Source: National Science Foundation
With the fully exposed graphene edges, high conductivity and large surface area, edge oriented graphene foam (EOGF), prepared by deposition of perpendicular graphene network encircling the struts of Ni foam, is a superior scaffold to support active materials for electrochemical applications. With VO2 as an example, EOGF loaded VO2 nanoparticle (VO2/EOGF) electrode has high rate performance as cathode in lithium ion batteries (LIBs). In addition to the Li+ intercalation into the lattice, contribution of non-diffusion limited pseudocapacitance to the capacity is prominent at high rates. VO2/EOGF based supercapacitor also exhibits fast response, with a characteristic frequency of 15 Hz when the phase angle reaches -45 degrees, or a relaxation time constant of 66.7 ms. These results suggest the promising potential of EOGF as a scaffold in supporting active nanomaterials for electrochemical energy storage and other applications. (C) 2018 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据