Journal
JOURNAL OF MATERIALS SCIENCE
Volume 54, Issue 5, Pages 4225-4235Publisher
SPRINGER
DOI: 10.1007/s10853-018-3143-1
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Funding
- National Natural Science Foundation of China [11374043, 11374223, 11705015]
- Natural Science Foundation of Jiangsu Educational Department [15KJA430001]
- Foundation of Jiangsu science and Technology Department [BA2016041]
- Six-talent peak of Jiangsu Province [2012-XCL-036]
- Science and Technology Development Plan Project in Suzhou [SYG201738, SYZ201710]
- Scientific Research Foundation of University [XZ1628]
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High-performance transition metal selenides are considered as promising electrode materials in alkali-ion batteries. However, the poor conductivity limits their further application. Herein, FeSe2 nanoparticles anchored on reduced graphene oxide (FeSe2@rGO) hybrid composites are prepared by a simple hydrothermal method and designed as promising anodes for lithium/sodium-ion batteries. The as-prepared FeSe2@rGO hybrids exhibit superior electrochemical performance with large reversible capacity and excellent cycling stability. In particular, the FeSe2@rGO electrodes deliver a specific capacity of 945.8mAhg(-1) for LIBs and a reversible capacity of 468.8mAhg(-1) for SIBs after 100 cycles at a current density of 100mAg(-1). Besides, the FeSe2@rGO electrodes demonstrate impressed rate capability and high ion diffusion coefficient. The results could enrich electrode materials synthesis methodologies and understand the complex charge-discharge process of metal selenides for next-generation batteries.
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