Journal
JOURNAL OF POWER SOURCES
Volume 302, Issue -, Pages 7-12Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2015.10.042
Keywords
Sodium ion battery; Prussian blue analog; Sodium titanium hexacyanoferrate; Cathode material
Funding
- National Science Foundation of China [21373028]
- National Key Program for Basic Research of China [2015CB251100]
- Major achievements Transformation Project for Central University in Beijing
- Beijing Science and Technology Project [D151100003015001]
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A new type of Prussian blue analog, sodium titanium hexacyanoferrate, has been synthesized with good electrochemical performance using an environmentally friendly, solution precipitation method. Because of the hydrolysis reaction of titanium, it has been proved that the synthetic reaction is sensitive to heat, and the best reaction temperature is 60 degrees C. The resulting particles belong to a well-defined open framework with cubic structure. Because of the two sodium storage sites provided by the low-spin [Fe(CN)(6)](4-/3-) couple and high-spin Ti3+/4+ couple, sodium titanium hexacyanoferrate exhibits a high specific capacity over 90 mAh g(-1), and two pairs of clear charge/discharge platforms at 3.0 V/2.6 V and 3.4 V/3.2 V, respectively. The results show that this material can be applied as a low-cost cathode electrode with good electrochemical performance for sodium ion batteries. (C) 2015 Elsevier B.V. All rights reserved.
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