Preparation method of lithium ion battery anode materials mixed with stibium and barium
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A lithium-ion battery and cathode material technology, which is applied in battery electrodes, circuits, electrical components, etc., can solve the problems of high resistivity and poor rate performance, and achieve the effect of high energy density and good conductivity
Inactive Publication Date: 2013-04-24
SHANGHAI JINZHONG INFORMATION TECH
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But it has a large resistivity and extremely poor rate performance
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Embodiment 1
[0019] Preparation of Raw Material Slurry
[0020] Diammonium hydrogen phosphate, iron oxalate, lithium carbonate, antimony trioxide, barium hydroxide, and yttrium oxide are in the ratio of P:Fe:Li:Sb:Ba:Y molar ratio of 1:1:1:0.01:0.005:0.003 After mixing, high-speed ball milling in an ethylene glycol medium at a rotational speed of 500 r / min for 10-12 hours to form a slurry with a particle size of 0.1-1 micron.
[0021] Preparation of precursors
[0022] Filter and wash the above slurry, and then use a flash dryer to obtain a nano-precursor under the conditions of an inlet air temperature of 200°C and an outlet air temperature of 100°C.
[0023] sintering
[0024] Place the dried precursor in a high-temperature furnace, sinter in a nitrogen atmosphere, heat to 500°C at a heating rate of 10°C / min, and calcine for 10 hours; then heat to 700°C at a heating rate of 12°C / min, and calcine 15h; then lower the temperature to 650°C at a cooling rate of 15°C / min, and anneal f...
Embodiment 2
[0026] Preparation of Raw Material Slurry
[0027] Diammonium hydrogen phosphate, iron oxalate, lithium carbonate, antimony trioxide, barium hydroxide, and yttrium oxide are in the ratio of 1:1:1:0.05:0.01:0.005 according to the molar ratio of P:Fe:Li:Sb:Ba:Y After mixing, high-speed ball milling at 700 r / min for 10 h in an ethylene glycol medium to form a slurry with a particle size of 0.1-1 micron.
[0028] Preparation of precursors
[0029] Filter and wash the above slurry, and then use a flash dryer to obtain a nano-precursor under the conditions of an inlet air temperature of 300°C and an outlet air temperature of 100°C.
[0030] sintering
[0031] Place the dried precursor in a high-temperature furnace, sinter in a nitrogen atmosphere, heat to 600°C at a heating rate of 10°C / min, and calcine for 5 hours; then heat to 800°C at a heating rate of 15°C / min, and calcine 10h; then lower the temperature to 600°C at a cooling rate of 20°C / min, and anneal for 5h; finally...
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Abstract
The invention discloses a preparation method of lithium ion battery anode materials mixed with stibium and barium. Plasma materials with micrometer diameters can be obtained after diammonium hydrogen phosphate, ferric oxalate, carbonic acid lithium, antimony trioxide, barium hydroxide, and yttrium oxide are mixed and ball-milled. Nanometer precursors can be obtained after the plasma materials are filtrated, washed and dried. The lithium ion battery anode materials mixed with the stibium and the barium can be obtained after the nanometer precursors are sintered. With utilizing lithium iron phosphate composite materials, a lithium ion battery can use a special ratio and a ternary-form sintering method, wherein the lithium ion battery is prepared by the preparation method of the lithium ion battery anode materials mixed with the stibium and the barium. Antimony, barium, rare earth element yttrium, and the like can be mixed in the lithium iron phosphate composite materials and property of the lithium iron phosphate composite materials can be changed. The lithium iron phosphate composite materials mixed with the stibium and the barium is high in energy density and good in electrical conductivity when applied in the lithium ion battery. Therefore, the lithium ion battery is high in specific capacity and stable in cycle property.
Description
technical field [0001] The invention relates to a preparation method of a lithium ion battery cathode material, in particular to an antimony and barium doped lithium ion battery cathode material and a preparation method thereof. Background technique [0002] As a new type of chemical power source, lithium-ion batteries have become the focus of the development of new energy materials in the world because of their high output voltage, high specific energy, long cycle life, small self-discharge, safety, no memory effect and environmental friendliness. . [0003] Cathode material is a key part that determines the performance of lithium-ion batteries. Today, with more emphasis on environmental protection and safety concepts, lithium iron phosphate has become a research and development hotspot in various countries. The material has many advantages such as high theoretical specific capacity (about 170mAh / g), non-toxicity, wide source of raw materials and abundant reserves, stable...
Claims
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