Patent ID: 7927741

Claim:
A lithium transition metal oxide having a lithium transition metal oxide represented by General Formula Li 1+x M 1−x O 2 (M: transition metal) as a main component and containing the three elements Mn, Co and Ni as transition metals (M), wherein x in the General Formula is from 0.01 to 0.20; and having a layered structure, wherein the ratio of the crystallite diameter as determined by the Measurement Method 1 according to the Rietveld method carried out under the conditions shown in Table 2 with respect to the mean powder particle diameter (D50) as determined by a laser diffraction/scattering-type particle size distribution measurement method is 0.05 to 0.20 and the crystallite diameter as determined by the Measurement Method 1 is 0.1 μm to 0.5 μm, wherein the 90% cumulative diameter (D90) as determined by a laser diffraction/scattering-type particle size distribution measurement method is 2.0 μm to 10.0 μm. TABLE 2 <Measurement Method 1 According to the Rietveld Method> Measurement Device X-ray Diffractomater using Cu-Kα beam Analysis Parameters FundamentalParameter Analysis Range Diffraction Angle 2θ = 10-120° Analysis Software Topas Version3 Refinement Range Rwp <8.0, GOF <2.0 (Machine Specs, Conditions, etc.) Sample disp(mm) Refine Detector PSD Detector Type VANTEC-1 High Voltage 5616 V Discr. Lower Level 0.35 V Discr. Window Width 0.15 V Grid Lower Level 0.075 V Grid Window Width 0.524 V Flood Field Correction Disabled Primary radius 250 mm Secondary radius 250 mm Receiving slit width 0.1436626 mm Divergence angle 0.3° Filament Length 12 mm Sample Length 25 mm Receiving Slit Length 12 mm Primary Sollers 2.623° Secondary Sollers 2.623° Lorentzian, 1/Cos 0.01630098 Th Det. 1 voltage 760.00 V Det. 1 gain 80.000000 Det. 1 discr. 1 LL 0.690000 Det. 1 discr. 1 WW 1.078000 Scan Mode Continuous Scan Scan Type Locked Coupled Spinner Speed 15 rpm Divergence Slit 0.300° Start 15.000000 Time per step 1 s Increment 0.01460 #steps 7152 Generator voltage 35 kV Generator current 40 mA.