Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 744, Issue -, Pages 196-203Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2018.02.045
Keywords
Layered double hydroxides; Electrochemical properties; Energy storage
Categories
Funding
- National Natural Science Foundation of China [51608412]
- natural Science Basic Research Plan in Shaanxi Province of China [2016JQ2034]
- Scientific Research Fund of Shaanxi University of Science and Technology [2016BJ-48]
- Special Fund Project of Education Department in Shaanxi Province of China [17JK0086]
- Science and Technology Department Foundation of Shaanxi Province [2016GY-199]
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Hybrids of layered double hydroxides (LDHs) and graphene-based nanocomposites have invoked a great deal of interest due to the unique and highly tunable composition and properties. Herein, CoAl-LDHs nanosheets were in-situ incorporated with reduced graphene oxide (rGO) via a simple one-step reflux method to improve the electrochemical performance of lithium-oxygen (Li-O-2) battery. The obtained nanocomposites tended to decrease the particle size of CoAl-LDHs nanosheets and endowed more catalytic active sites. Benefiting from the synergistic effect, the fabricated rGO/CoAl-LDHs nanocomposites enhanced the charge transfer process and the first discharge specific capacity up to 300% higher than the pristine rGO under the same condition. In addition, the battery showed excellent cycling stability with no capacity loss over 30 cycles, as well as markedly lower recharge voltage. The results provide a facile way to prepare two-dimensional cathode material for Li-O-2 battery. (c) 2018 Elsevier B.V. All rights reserved.
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