Method for quickly synthesizing ternary lithium battery cathode material precursor by single reactor

A technology of ternary lithium battery and positive electrode material, which is applied in battery electrodes, positive electrodes, active material electrodes, etc., can solve the problems of poor yield and long reaction time, so as to speed up the reaction speed, improve the yield and increase the output. Effect

Active Publication Date: 2017-11-07
JINGMEN GEM NEW MATERIAL +1
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Problems solved by technology

Gradually, some manufacturers make simple thickening tanks and connect them to the reactor so that the materials overflow from the simple thickening tanks. Since there is no stirring in the thickening tanks, it

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  • Method for quickly synthesizing ternary lithium battery cathode material precursor by single reactor

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Example Embodiment

[0022] like figure 1 As shown, the rapid synthesis device involved in the method of the present invention includes a reactor and a thickener, and an overflow port is arranged on the reactor, and the overflow port is communicated with the thickener, and the bottom of the thickener is connected with the reactor through a circulating pump, There is a filter rod in the thickener, and the mother liquor collected by the filter rod is connected to a vacuum buffer tank through a flow meter and a pneumatic valve.

[0023] During specific implementation, feed materials into the reactor, and the liquid level in the reactor rises to the overflow port, and then the slurry overflows into the thickener. The nickel-cobalt-manganese ternary solution with a concentration of 70-120g / l, 15-40% NaOH solution, and 5-25% ammonia water are fed into the reactor at a uniform speed through the flowmeter at the same time, and the flow rate of the ternary solution is controlled at 300-1200L / h, Sampling ...

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Abstract

The invention belongs to the field of battery material manufacturing, and in particular relates to a method for quickly synthesizing a ternary lithium battery cathode material precursor by a single reactor. The method comprises the following steps: feeding into a reaction kettle, when a liquid level in the reaction kettle rises to an overflow port, slurry overflows to a thickening device, the bottom part of the thickening device is connected with a circulating pump, a circulating pump outlet is inside the reaction kettle to pump the slurry in the thickening device to the reaction kettle. Filter rods in a filtering part of the thickening device are arranged regularly and connected to a vacuum buffer tank in an aggregation way, part of the slurry is filtered by the filter rods, and particles in the slurry are intercepted in the thickening device, the concentrated slurry is pumped into the reaction kettle by the circulating pump to continue to react, filtrate passing through the filter rods is discharged into the vacuum buffer tank. The method provided by the invention can enhance the thickening effect, greatly improve the synthetic ternary liquid flow rate, accelerate the reaction speed, and improve the yield of the synthesis stage, thereby increasing the output and reducing the cost.

Description

technical field [0001] The invention belongs to the field of battery material manufacturing, and in particular relates to a method for rapidly synthesizing a precursor of a ternary lithium battery positive electrode material in a single kettle. Background technique [0002] Nickel-cobalt-manganese hydroxide is the precursor of the positive electrode material of the ternary finished battery (nickel-cobalt-manganese oxide). The ternary lithium polymer battery is low in cost, high in gram capacity (>150mAh / g), and the working voltage is the same as that of the existing electrolyte. Matching, good safety, excellent circulation, high gram capacity and other advantages. It is now widely used in small electrical appliances, electric tools, electric vehicles and other fields. The nickel-cobalt-manganese hydroxide synthesis process mostly uses an independent reactor for reaction. During the reaction process, before the particle size reaches the standard, the material directly ove...

Claims

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Application Information

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IPC IPC(8): H01M4/505H01M4/525
CPCH01M4/505H01M4/525H01M2004/028Y02E60/10
Inventor 许开华乐绪清李涛白亮陈天斌唐兴邦吕志李友福杨开
Owner JINGMEN GEM NEW MATERIAL
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