期刊
NANOSCALE
卷 10, 期 2, 页码 800-806出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7nr08255j
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资金
- National Key Research and Development Program of China [2016YFB0700604]
- Guangdong Innovative and Entrepreneurial Research Team Progress [2013N080]
- National Natural Science Foundation of China [21622407, 21673008, 21304002]
Sodium-ion batteries (SIBs) are regarded as promising alternative energy-storage devices to lithium-ion batteries (LIBs). However, the trade-off of between energy density and power density under high mass-loading conditions restricts the application of SIBs. Herein, we synthesized an FeSe@FeS material via a facile solid-state reaction. A microcapsule architecture was spontaneously achieved in this process, which facilitated electron transport and provided stable diffusion paths for Na ions. The FeSe@FeS material exhibits a high capacity retention (485 mA h g(-1) at 3 A g(-1) after 1400 cycles) and superior rate capability (230 mA h g(-1) at 10 A g(-1) after 1600 cycles) in the half-cell test. Furthermore, superior cycling stability is achieved in the full-cell test. The high mass-loaded FeSe@FeS electrodes (8 mg cm(-2) ) realize a high areal capacity retention of 2.8 mA h cm(-2) and high thermal stability.
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