Abstract
Li−O2 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−O2 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−O2 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−O2 batteries.
Original language | English |
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Pages (from-to) | 176-181 |
Number of pages | 6 |
Journal | ChemNanoMat |
Volume | 2 |
Issue number | 3 |
DOIs | |
Publication status | Published - 2016 Mar |
Externally published | Yes |
Keywords
- Li−O battery
- nanoporous graphene
- nanoporous metal
- nitrogen-doped graphene
- volumetric capacity
ASJC Scopus subject areas
- Biomaterials
- Renewable Energy, Sustainability and the Environment
- Energy Engineering and Power Technology
- Materials Chemistry