Positive electrode plate for nonaqueous electrolyte secondary battery, method for producing same, and nonaqueous electrolyte secondary battery
A non-aqueous electrolyte and secondary battery technology, which is applied in the direction of non-aqueous electrolyte battery electrodes, non-aqueous electrolyte batteries, electrode manufacturing, etc., can solve the problems of battery characteristic degradation, and achieve the effects of inhibiting generation, preventing gas generation, and preventing contact
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Embodiment approach 1
[0045] Below, use figure 1 The positive electrode plate for a nonaqueous electrolyte secondary battery in Embodiment 1 will be described in detail.
[0046] figure 1 It is a schematic cross-sectional view of the positive electrode mixture layer 22 constituting the positive electrode plate for a non-aqueous electrolyte secondary battery in this embodiment. Usually, the positive electrode mixture layer 22 is formed on both sides of the current collector (not shown). figure 1 Only the structure of one side is shown in . The positive electrode mixture layer 22 is at least composed of a granular positive electrode active material 23 and a fracture surface 24 of the granular active material 23 inside the positive electrode mixture layer 22, a fracture surface 25 of the active material 23 positioned on the surface of the positive electrode mixture layer, and a surface 26 of the positive electrode active material. The neutral lithium salts 24a, 25a, 26a other than lithium hydroxide...
Embodiment 1
[0117] -Cathode active material LiNi 0.80 co 0.15 al 0.05 o 2 production of -
[0118] Cobalt sulfate and aluminum sulfate were added to an aqueous nickel sulfate solution to prepare a saturated aqueous solution. The content ratio of nickel, cobalt, and aluminum in this saturated aqueous solution was adjusted so that the molar ratio of each element may become 80:15:5. Then, sodium hydroxide is added to the above-mentioned saturated aqueous solution to neutralize, thus forming a ternary hydroxide, namely Ni 0.80 co 0.15 al 0.05 (OH) 2 precipitation. The obtained precipitate was filtered, washed with water, and then dried at 80°C.
[0119] Next, the above-mentioned ternary system hydroxide was heated at 600° C. for 10 hours in the air to obtain a ternary system oxide, Ni 0.80 co 0.15 al 0.05O . Then, lithium hydroxide monohydrate was added to the above-mentioned ternary oxide, and fired at 800° C. for 10 hours in an oxygen flow, thereby obtaining a lithium-containin...
Embodiment 2
[0135] -Cathode active material LiNi 1 / 3 co 1 / 3 mn 1 / 3 o 2 production of -
[0136] Cobalt sulfate and manganese sulfate were added to an aqueous nickel sulfate solution to prepare a saturated aqueous solution. The content ratio of nickel, cobalt, and manganese in this saturated aqueous solution was adjusted so that the molar ratio of each element may become 1:1:1. Then, sodium hydroxide is added to the above-mentioned saturated aqueous solution to neutralize, thus forming a ternary hydroxide, namely Ni 1 / 3 co 1 / 3 mn 1 / 3 (OH) 2 precipitation. The obtained precipitate was filtered, washed with water, and then dried at 80°C.
[0137] Next, the above-mentioned ternary system hydroxide was heated at 600° C. for 10 hours in the air to obtain a ternary system oxide, Ni 1 / 3 co 1 / 3 mn 1 / 3 O. Then, lithium hydroxide was added to the above-mentioned ternary oxide, and fired at 800° C. for 10 hours in an oxygen stream to obtain a lithium-containing composite oxide (LiNi 1 / 3...
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