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Title:
ELECTROLYTIC MANGANESE DIOXIDE, METHOD FOR PRODUCING SAME, AND USE OF SAME
Document Type and Number:
WIPO Patent Application WO/2011/024765
Kind Code:
A1
Abstract:
Disclosed are: an electrolytic manganese dioxide to be used as a positive electrode active material for an alkaline manganese dry battery, which has excellent middle-rate discharge characteristics, while having high alkali potential, high reactivity for a positive electrode of a battery, and high fillability at the same time; an electrolytic manganese dioxide which has excellent high-rate discharge characteristics and excellent middle-rate discharge characteristics and does not corrode metal materials; and a method for producing the electrolytic manganese dioxides. Specifically disclosed is an electrolytic manganese dioxide which has an alkali potential of 280 mV or more but less than 310 mV and an FWHM of 2.2-2.9˚ (inclusive). It is preferable that the electrolytic manganese dioxide has a (110)/(021) peak intensity ratio of 0.50-0.80 (inclusive) in the X-ray diffraction peak pattern, and an interplanar distance between the (110) planes of 4.00-4.06 Ǻ (inclusive). Furthermore, the electrolytic manganese dioxide preferably has a JIS-pH of 1.5 or more but less than 2.6 (in accordance with JIS K1467), a sodium content of 0.02% by weight or more but less than 0.10% by weight, a sulfuric acid radical of less than 1.30% by weight, a median diameter of 30-50 μm (inclusive), and a BET specific surface area of 20-50 m2/g (inclusive).

Inventors:
SUETSUGU KAZUMASA (JP)
TAKAHASHI KENICHI (JP)
ESHITA AKINORI (JP)
Application Number:
PCT/JP2010/064202
Publication Date:
March 03, 2011
Filing Date:
August 23, 2010
Export Citation:
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Assignee:
TOSOH CORP (JP)
SUETSUGU KAZUMASA (JP)
TAKAHASHI KENICHI (JP)
ESHITA AKINORI (JP)
International Classes:
C25B1/21; C01G45/02; H01M4/50
Foreign References:
JP2009135067A2009-06-18
JP2003234107A2003-08-22
JP2002348693A2002-12-04
JP2008013427A2008-01-24
JP2000036304A2000-02-02
JP2001163622A2001-06-19
JP2009193160A2009-08-27
JP2009278237A2009-11-26
Other References:
FURUKAWA DENKO REPORT, NO. 43, May 1967 (1967-05-01), pages 91 - 102
Attorney, Agent or Firm:
SENMYO, Kenji et al. (JP)
Spring name Kenji (JP)
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