期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 5, 期 34, 页码 17881-17888出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7ta01870c
关键词
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资金
- National Natural Science Foundation of China [51572194]
- Key Projects of Tianjin Municipal Natural Science Foundation of China [14JCZDJC32200]
- Academic Innovation Funding of Tianjin Normal University [52XC1404]
Herein, an ultrathin Al2O3 layer was coated onto NiCo2O4 nanosheets via an atomic layer deposition (ALD) method, and the NiCo2O4 coated with an ALD-derived Al2O3 material was successfully used as an anode material for sodium-ion batteries (SIBs). This kind of electrode exhibited enhanced cycling performance with a reversible capacity of 395 mA h g(-1) after 50 cycles, and good rate capability with the discharge capacities of 350, 320, and 294 mA h g(-1) at the various current densities of 100, 200, and 400 mA g(-1), respectively. Interestingly, remarkable prevention of the reactions between the electrode and electrolyte was observed. The performance improvement is due to the protection of the NiCo2O4 coated with an ALD-derived Al2O3 layer from the electrochemical active materials. These results demonstrate the great potential of NiCo2O4 coated with an ALD-derived Al2O3 material as anodes in SIBs.
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