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Graphene@Nanoporous Nickel Cathode for Li−O 2 Batteries
Author(s) -
Guo Xianwei,
Han Jiuhui,
Liu Pan,
Ito Yoshikazu,
Hirata Akihiko,
Chen Mingwei
Publication year - 2016
Publication title -
chemnanomat
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.947
H-Index - 32
ISSN - 2199-692X
DOI - 10.1002/cnma.201500214
Subject(s) - nanoporous , cathode , materials science , energy storage , graphene , electrochemistry , supercapacitor , nickel , nanotechnology , optoelectronics , electrode , electrical engineering , metallurgy , chemistry , engineering , power (physics) , physics , quantum mechanics
Li−O 2 batteries are a promising electrochemical energy‐storage system with a sufficient energy density for all electric vehicles, with a one‐charge driving distance comparable to conventional petrol cars. However, the practical implementations of Li−O 2 batteries face many scientific and technological challenges. Among these is the development of high‐performance cathode materials that can provide high capacity, low charge/discharge overpotentials and stable cycling stability. Here, we report a nanoporous Ni cathode covered by N‐doped graphene and self‐grown catalyst for rechargeable Li−O 2 batteries. The novel hybrid cathode shows relatively low charge/discharge overpotentials, high volumetric capacity and long cycling lifetime, which may pave a new way for practical implementation of economic nanoporous metals as binder‐free cathodes for high‐performance Li−O 2 batteries.