Positive electrode active material for non-aqueous electrolyte secondary battery, method for producing positive electrode active material for non-aqueous electrolyte secondary battery, positive electrode for non-aqueous electrolyte secondary battery, non-aqueous electrolyte secondary battery, method for producing non-aqueous electrolyte secondary battery, and method for use of non-aqueous electrolyte secondary battery
A positive active material, non-aqueous electrolyte technology, used in non-aqueous electrolyte batteries, electrolyte battery manufacturing, active material electrodes, etc., can solve problems such as difficulty in extracting lithium and inability to reduce interface resistance
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no. 1 approach
[0123] According to the first embodiment, it is possible to provide a non-aqueous electrolyte secondary battery in which a rapid increase in battery voltage is not observed even at a higher SOC, its manufacturing method, and its usage method.
[0124] According to the second embodiment, it is possible to provide + The positive electrode active material for non-aqueous electrolyte secondary batteries showing excellent first-time coulombic efficiency and high-rate discharge performance when used at the potential of ), its production method, the positive electrode containing the above-mentioned positive electrode active material, and the non-aqueous electrolyte secondary battery with the above-mentioned positive electrode The battery and the method for manufacturing the battery can also provide a non-aqueous electrolyte secondary battery in which no rapid rise in battery voltage is observed until the SOC reaches a higher level, a method for manufacturing the battery, and a method ...
Embodiment 1－1
[0286]
[0287] Weigh 284g of nickel sulfate hexahydrate, 303g of cobalt sulfate heptahydrate, and 443g of manganese sulfate pentahydrate, and dissolve them all in 4L of ion-exchanged water to make a molar ratio of Ni:Co:Mn of 27:27:46 to 1.0 M's sulfate solution.
[0288] Next, 2 L of ion-exchanged water was injected into a 5-L reaction tank, and argon gas was bubbled for 30 minutes to remove oxygen contained in the ion-exchanged water. The temperature of the reaction tank was set at 50° C. (±2° C.), and the reaction tank was stirred at a rotation speed of 1500 rpm using a paddle blade equipped with a stirring motor, and was set so as to allow sufficient convection in the reaction tank. The above-mentioned sulfate aqueous solution was added dropwise to the reaction tank at a rate of 3 mL / min. Here, during the period from the start to the end of the dropwise addition, a mixed alkali aqueous solution composed of 4.0M sodium hydroxide, 0.5M ammonia and 0.2M hydrazine is appro...
Embodiment 1－2
[0310] The lithium transition metal composite oxide Li prepared in Example 1-1 1.13 Ni 0.235 co 0.235 mn 0.40 o 2 358 g was added to 200 mL of a 0.1 M aluminum sulfate aqueous solution, and stirred at 25° C. and 400 rpm for 30 seconds using an electromagnetic stirrer. Thereafter, the powder was separated from the filtrate by suction filtration. The obtained powder was dried in the air at 80° C. for 20 h. Furthermore, heat treatment was performed in the air at 400° C. for 4 hours using the aforementioned box-type electric furnace. Thus, a lithium transition metal composite oxide (hereinafter, referred to as “LR-Al”) coated with an aluminum compound was produced. Except for using the lithium transition metal composite oxide as the positive electrode active material, the non-aqueous electrolyte secondary battery was assembled and initially charged and discharged in the same manner as in Example 1-1, and the non-aqueous electrolyte of Example 1-2 was completed. secondary b...
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Abstract
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