Title:
ANODE ACTIVE MATERIAL FOR SODIUM BATTERY, ANODE, AND SODIUM BATTERY
Document Type and Number:
WIPO Patent Application WO/2013/069597
Kind Code:
A1
Abstract:
In the present invention, in order to increase the cycling characteristics of a sodium battery, sodium titanate is used as the anode active material for the sodium battery. For example, the anode active material is preferably the sodium titanate represented by compositional formula (1) or compositional formula (2): compositional formula (1) being Na2+XTi3O7 (0 ≤ X ≤ 0.9); and compositional formula (2) being Na4+XTi5O12 (0 ≤ X ≤ 1.0). Furthermore, by reducing the amount of water in the battery and by optimizing the particle size of the active material, the sodium titanate can even be represented by the following compositional formulae: compositional formula (1') being Na2+XTi3O7 (0 ≤ X ≤ 2.0); and compositional formula (2') being Na4+XTi5O12 (0 ≤ X ≤ 2.0).
Inventors:
FUKUNAGA ATSUSHI (JP)
INAZAWA SHINJI (JP)
NITTA KOJI (JP)
SAKAI SHOICHIRO (JP)
INAZAWA SHINJI (JP)
NITTA KOJI (JP)
SAKAI SHOICHIRO (JP)
Application Number:
PCT/JP2012/078590
Publication Date:
May 16, 2013
Filing Date:
November 05, 2012
Export Citation:
Assignee:
SUMITOMO ELECTRIC INDUSTRIES (JP)
International Classes:
H01M10/39; H01M4/485
Domestic Patent References:
| WO2011135967A1 | 2011-11-03 | |||
| WO2012132813A1 | 2012-10-04 | |||
| WO2011077939A1 | 2011-06-30 | |||
| WO2010002006A1 | 2010-01-07 | |||
| WO2012073653A1 | 2012-06-07 |
Foreign References:
| JP2011192474A | 2011-09-29 |
Other References:
PREMKUMAR SENGUTTUVAN ET AL.: "Na2Ti307: Lowest Voltage Ever Reported Oxide Insertion Electrode for Sodium Ion Batteries", CHEMISTRY OF MATERIALS, vol. 23, 30 August 2011 (2011-08-30), pages 4109 - 4111, XP055067229
Attorney, Agent or Firm:
SunCrest Patent and Trademark Attorneys (JP)
Patent business corporation Sun Crest international patent firm (JP)
Patent business corporation Sun Crest international patent firm (JP)
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