Nonaqueous electrolyte secondary battery
A non-aqueous electrolyte and secondary battery technology, applied in non-aqueous electrolyte storage batteries, secondary batteries, battery electrodes, etc., can solve the problems of electrolyte decomposition on the surface of the positive electrode, deterioration of the LiCoO2 structure, etc., and achieve the effect of improving the charge and discharge capacity.
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Embodiment 1
[0039] [LiCo 0.99 Zr 0.005 Mg 0.005 o 2 production]
[0040] Will Li 2 CO 3 、Co 3 o 4 , ZrO 2 and MgO according to the molar ratio of Li:Co:Zr:Mg of 100:99:0.5:0.5 in an Ishikawa-style grinding and stirring mortar, heat treatment at 850°C for 24 hours in an air atmosphere, and then pulverize, Thus, LiCo with an average particle size of about 14 μm 0.99 Zr 0.005 Mg 0.005 o 2 .
[0041] [LiMn 0.33 Ni 0.33 co 0.34 o 2 production]
[0042] LiOH and Mn 0.33 Ni 0.33 co 0.34 (OH) 2 The representative co-precipitated hydroxide is mixed in an Ishikawa-style grinding and stirring mortar according to the molar ratio of Li and all transition metals of 100:100, and then heat-treated at 1000°C for 20 hours in an air atmosphere, and then pulverized. LiMn with an average particle size of about 5 μm was thus obtained 0.33 Ni 0.33 co 0.34 o 2 .
[0043] [making of positive electrode]
[0044] The above obtained LiCo 0.99 Zr 0.005 Mg 0.005 o 2 and LiMn 0.33 Ni 0...
Embodiment 2
[0057] In the fabrication of the positive electrode, the LiCo 0.99 Zr 0.005 Mg 0.005 o 2 and LiMn 0.33 Ni 0.33 co 0.34 o 2 Except for mixing at a weight ratio of 8:2, a nonaqueous electrolyte secondary battery A2 was produced in the same manner as in Example 1, and thermal stability and charge-discharge cycle characteristics were evaluated.
Embodiment 3
[0059] [LiCo 0.978 Zr 0.002 Mg 0.01 Al 0.01 o 2 production]
[0060] In the fabrication of the positive electrode, the Li 2 CO 3 、Co 3 o 4 , ZrO 2 , MgO and Al 2 o 3 According to the molar ratio of Li: Co: Zr: Mg: Al 100: 97.8: 0.2: 1.0: 1.0, after mixing in an Ishikawa-type grinding and stirring mortar, heat treatment was carried out at 850 °C for 24 hours in an air atmosphere, and then Pulverized, thus obtaining LiCo with an average particle size of about 12 μm 0.978 Zr 0.002 Mg 0.01 Al 0.01 o 2 .
[0061] [Production of battery]
[0062] Will get LiCo 0.978 Zr 0.002 Mg 0.01 Al 0.01o 2 with LiMn 0.33 Ni 0.33 co 0.34 o 2 Except for mixing at a weight ratio of 7:3, a nonaqueous electrolyte secondary battery A3 was produced in the same manner as in Example 1, and thermal stability and charge-discharge cycle characteristics were evaluated.
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