Journal
CERAMICS INTERNATIONAL
Volume 40, Issue 8, Pages 13679-13682Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2014.04.126
Keywords
Cathode material; Electrochemical performance; Na0.7Fe0.7Mn0.3O2; Sodium-ion battery
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Funding
- National Natural Science Foundation of Chin [21161002]
- Guangxi Nature Science Foundation of China [2011GXNSFA018036]
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A new technique was employed to synthesize Na0.7Fe0.7Mn0.3O2 precursor by adding citric acid to an aqueous solution of sodium, iron, and manganese salts. The rhombohedral Na0.7Fe0.7Mn0.3O2 was obtained by calcining the precursor in air. The precursor and its calcined products were characterized by X-ray powder diffraction and scanning electron microscopy. The results showed that a high-crystallized Na0.7Fe0.7Mn0.3O2 with a rhombohedral structure was obtained when the precursor was calcined over 600 degrees C in air for 8 h. The product obtained at 800 degrees C delivered a discharge capacity of about 130 mA h g(-1) at the specific current of 13 mA g(-1) in the 1st cycle between 1.5 V and 4.3 V. (C) 2014 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
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