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Special nano-lithium titanate composite material preparation system for lithium battery

A nano-lithium titanate and composite material technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of particle size and purity, which are difficult to achieve, stay, and difficult to mass-produce.

Inactive Publication Date: 2018-05-15
GUANGXI JINMAO TITANIUM
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Problems solved by technology

However, the titanium dioxide and lithium titanate composite materials produced in the prior art are difficult to meet the requirements for application in lithium titanate batteries in terms of particle size and purity, and are difficult to produce on a large scale, staying at the laboratory level

Method used

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  • Special nano-lithium titanate composite material preparation system for lithium battery
  • Special nano-lithium titanate composite material preparation system for lithium battery
  • Special nano-lithium titanate composite material preparation system for lithium battery

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Embodiment Construction

[0100] The above-mentioned technical features and advantages of the present invention will be described in more detail below in conjunction with the embodiments.

[0101] A preparation system for nano-lithium titanate composite materials dedicated to lithium batteries, comprising: step 1, crushing; step 2, acidolysis; step 3, sedimentation; step 4, crystallization; step 5, hydrolysis; step 6, washing once; 7. Bleaching; step 8, secondary water washing; step 9, preparation of seed crystals; step 10, salt treatment; step 11, calcination; step 12, crushing; step 13, synthesis of lithium titanate composite material; step 14, three times Washing with water; step 15, pressure drying; step 16, flash drying; step 17, micron crushing; step 18, powder selection and classification; step 19, pulse dust removal.

[0102] Step 5: injecting the treated crystal seeds into a hydrolysis tank for hydrolysis, and the titanyl sulfate in the titanium liquid is hydrolyzed by induction of active crys...

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Abstract

The invention relates to a special nano-lithium titanate composite material preparation system for a lithium battery. The special nano-lithium titanate composite material preparation system is characterized by comprising the following steps: mixing titanium dioxide, aluminum salt, a carbon source, lithium salt and magnesium salt, firstly pulping the titanium dioxide, dissolving the aluminum salt,the magnesium salt and the lithium salt and putting the titanium dioxide, the aluminum salt, the magnesium salt and the lithium salt in a dispersing agent for mixing; performing vacuum drying to obtain a precursor, wherein the molar ratio of titanium to aluminum to magnesium to lithium to carton elements is 5:(0.05-0.3):(0.1-0.4):(4.95-4.7):(2-20); putting the precursor in an inert gas heating furnace for high-temperature calcination, wherein the temperature is 800-1000 DEG C, and the time exceeds 8 hours; then reducing a calcined product to a room temperature to obtain a carbon-coated lithiumtitanate composite material.

Description

technical field [0001] The invention relates to the field of preparation of lithium batteries, in particular to the field of production of lithium titanate composite materials. Background technique [0002] Ordinary lithium-ion batteries have the advantages of high specific energy, high specific power, high energy conversion efficiency, and long cycle life, but there are problems such as difficulty in discharging and charging at low temperatures. The lithium titanate battery uses lithium titanate as the negative electrode material, adds nano-titanium dioxide as auxiliary materials, and adds core technologies such as compressive strain constant pressure valves. It is a new generation of lithium battery products that are safe, environmentally friendly, and long-lived. The volume ratio has greatly surpassed other lithium batteries. Ordinary lithium batteries have very low charge and discharge capacity below 0°C and cannot work normally. Nano-lithium titanate batteries have a c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/485
CPCH01M4/362H01M4/485Y02E60/10
Inventor 柴春旺
Owner GUANGXI JINMAO TITANIUM
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