Title:
POSITIVE ELECTRODE ACTIVE SUBSTANCE FOR LITHIUM ION CELL, POSITIVE ELECTRODE FOR LITHIUM ION CELL, AND LITHIUM ION CELL
Document Type and Number:
WIPO Patent Application WO/2012/133436
Kind Code:
A1
Abstract:
Provided is a positive electrode active substance for a lithium ion cell having good cell properties. The positive electrode active substance for a lithium ion cell is represented by the formula LixNi1-yMyO2+α (where M is one or more selected from the group consisting of Sc, Ti, V, Cr, Mn, Fe, Co, Cu, Zn, Ga, Ge, Bi, Sn, Mg, Ca, B and Zr; 0.9 ≦ x ≦ 1.2; 0 < y ≦ 0.7; and α > 0.1); the primary particle grain size is between 1.6 and 2.3 µm, the amount of alkali at the particle surface as determined by two-step neutral point titration is 1.2 mass% or less; and when, of the amount of alkali at the particle surface, the amount of lithium hydroxide is A mass% and the amount of lithium carbonate is B mass%, A/B is 1 or less.
Inventors:
OKAMOTO KENTARO (JP)
Application Number:
PCT/JP2012/057976
Publication Date:
October 04, 2012
Filing Date:
March 27, 2012
Export Citation:
Assignee:
JX NIPPON MINING & METALS CORP (JP)
OKAMOTO KENTARO (JP)
OKAMOTO KENTARO (JP)
International Classes:
H01M4/525; H01M4/505
Domestic Patent References:
| WO2011108720A1 | 2011-09-09 | |||
| WO2011065391A1 | 2011-06-03 |
Foreign References:
| JP2007257890A | 2007-10-04 | |||
| JP2006286336A | 2006-10-19 | |||
| JPH09129230A | 1997-05-16 | |||
| JP2003203633A | 2003-07-18 | |||
| JPH10302779A | 1998-11-13 |
Attorney, Agent or Firm:
AXIS Patent International (JP)
Axis international patent business corporation (JP)
Axis international patent business corporation (JP)
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Claims:
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