ELECTRODE ACTIVE MATERIAL, LITHIUM-ION BATTERY, ELECTRODE ACTIVE MATERIAL DISCHARGE STATE DETECTION METHOD, AND ELECTRODE ACTIVE MATERIAL MANUFACTURING METHOD

WIPO Patent Application WO/2013/146207

A1

Provided are an electrode active material, a lithium-ion battery, and a method for detecting a discharge state of the electrode active material with which it is possible to achieve high load characteristics, high cycle characteristics, and a high energy density, to ensure high levels of safety and stability, and to allow the final state of discharge to be easily detected. For this kind of electrode active material (1), the surface of a particle (2) made of LiwAxDO4 (wherein A represents one or two kinds selected from a group comprising Mn and Co; D represents one or more kinds selected from a group comprising P, Si, and S; and 0 < w ≤ 4, 0 < x ≤ 1.5) is coated with a coating layer (3) containing LiyEzGO4 (wherein E represents either Fe or Fe and Ni; G represents one or more kinds selected from a group comprising P, Si, and S; and 0 < y ≤ 2, 0 < z ≤ 1.5), and a second region which exhibits a drop in the discharge potential in a discharge curve, that follows a first region which exhibits a substantially fixed discharge potential, includes a third region that exhibits a discharge potential fluctuation rate lower than an average discharge potential fluctuation rate of a second region.

OONO KOUJI (JP)
OSHITARI SATORU (JP)
YAMAMOTO KAZUYO (JP)

PCT/JP2013/056593

October 03, 2013

March 11, 2013

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SUMITOMO OSAKA CEMENT CO LTD (JP)

H01M4/36; H01M4/58

WO2011032264A1

2011-03-24

JP2011181375A	2011-09-15
JPH05258773A	1993-10-08
JP2007250299A	2007-09-27

SHIGA Masatake et al. (JP)
Masatake Shiga (JP)

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