Title:
BATTERY NEGATIVE ELECTRODE ACTIVE MATERIAL LIQUID AND BATTERY POSITIVE ELECTRODE ACTIVE MATERIAL LIQUID, AND METHOD FOR PREPARING SAME
Document Type and Number:
WIPO Patent Application WO/2017/065211
Kind Code:
A1
Abstract:
The present invention addresses the problem of providing a battery negative electrode active material liquid and battery positive electrode active material liquid, and a method for preparing the same, the liquids being not limited to a specific vanadium concentration or a specific concentration of sulfur in the form of a hydrogen sulfate radical, for example, wherein, even when vanadium in particular has a high concentration, complexes in the liquids do not readily transition to a precipitation type vanadium compound, the liquids maintaining sufficient electrode reactivity and flowability under a free charging/discharging operation, and enabling stable and energy- efficient charging and discharging. The battery negative electrode active material liquid comprises a liquid containing a sulfuric acid acidic vanadium compound, the battery negative electrode active material liquid being characterized by the use of a carbon electrode which contains bivalent and trivalent vanadium and in which a half-value width of a 002 diffraction peak according to X-ray diffraction analysis is not more than 2.5°, wherein a plurality of oxidation waves of bivalent vanadium is detected as observed by a potential sweep method in which, with the electrode and the battery negative electrode active material liquid kept stationary, a potential is swept from a potential on the negative side of -0.1 V with reference to a standard hydrogen electrode potential toward the positive side.
Inventors:
HOSOBUCHI KAORU (JP)
NAKAI TAKAYUKI (JP)
MATSUURA HIROAKI (JP)
HAMANA HIROSHI (JP)
NAKAI TAKAYUKI (JP)
MATSUURA HIROAKI (JP)
HAMANA HIROSHI (JP)
Application Number:
PCT/JP2016/080365
Publication Date:
April 20, 2017
Filing Date:
October 13, 2016
Export Citation:
Assignee:
GALAXY CORP (JP)
CHIKOJI GAKUEN EDUCATIONAL ASS (JP)
CHIKOJI GAKUEN EDUCATIONAL ASS (JP)
International Classes:
H01M8/18; H01M4/96
Domestic Patent References:
| WO2014125662A1 | 2014-08-21 |
Other References:
VIJAYAKUMAR, M ET AL.: "Towards understanding the poor thermal stability of V5+ electrolyte solution in Vanadium Redox Flow Batteries", JOURNAL OF POWER SOURCES, vol. 196, no. 7, 2011, pages 3669 - 3672, XP028129772
Attorney, Agent or Firm:
MARUYAMA Eiichi (JP)
Download PDF:
Previous Patent: MICROCHANNEL CHIP AND METHOD FOR MANUFACTURING SAME
Next Patent: VEHICLE CONTROL DEVICE AND VEHICLE CONTROL METHOD
Next Patent: VEHICLE CONTROL DEVICE AND VEHICLE CONTROL METHOD