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A preparing method of a high-power high-energy density lithium ion battery

A lithium-ion battery, high energy density technology, used in the manufacture of electrolyte batteries, battery electrodes, secondary batteries, etc., can solve problems such as rate type energy difference, poor liquid absorption ability, etc. The effect of improving conductivity and rate capability

Inactive Publication Date: 2015-07-08
JIANGSU LENENG BATTERY INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] This invention aims at the disadvantages of current ternary materials such as poor multiplier energy and poor liquid absorption capacity. The purpose of this invention is to provide a hollow structure three Elementary cathode materials to meet the market demand for high-rate and high-energy-density lithium-ion batteries

Method used

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Examples

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Embodiment 1

[0013] A method for preparing a lithium-ion battery with high power and high energy density, comprising the following steps:

[0014] 1. Anode material: Weigh 30 grams of polystyrene with a particle size of 50nm and 100 grams of polystyrene with a particle size of 1.5 μm, add it to 1000 grams of double distilled water solvent and stir evenly, then add 26.2 grams (0.1mol) of NiSO 4 ·6H 2 O, 28.1 g (0.1 mol) C O SO 4 ·7H 2 O, 19.8 g (0.1 mol) MnCl 2 4H 2 O, 28.8 grams (0.3 mol) of ammonium carbonate, and then filter it to obtain an organic-inorganic structure composite material, then mix it with 7.2 grams (0.3 mol) of lithium hydroxide, and use 100 milliliters of tetrahydrofuran organic solvent to dissolve and remove the template, after filtering Get Li(Ni x co y mn 1-x-y )O 2 (Denoted as: NCM) material, then place the above-mentioned dry NCM material in the reactor, feed nitrogen into the reactor, and heat to make the temperature in the reactor reach 800 ° C, stop feed...

Embodiment 2

[0017] 1. Anode material: Weigh 10 grams of polystyrene with a particle size of 40nm and 40 grams of polystyrene with a particle size of 1.0 μm, add them to 1000 grams of ethanol solvent and stir evenly, then add 26.2 grams (0.1mol) of NiSO 4 ·6H 2 O, 28.1 g (0.1 mol) C O SO 4 ·7H 2 O, 19.8 g (0.1 mol) MnCl 2 4H 2 O, 6.0 grams (0.1mol) of urea, after which it was filtered to obtain an organic-inorganic structure composite material, then mixed with 7.4 grams (0.1mol) of lithium carbonate, and 200 milliliters of tetrahydrofuran organic solvent was used to dissolve and remove the template, and after filtration, Li (Ni x co y mn 1-x-y )O 2 (Denoted as: NCM) material, then place the above-mentioned dry NCM material in the reactor, feed nitrogen into the reactor, and heat to make the temperature in the reactor reach 500 ° C, stop feeding nitrogen, and then feed Pass acetylene and ammonia into the reactor, keep it at 8000°C for 60 minutes, and grow carbon nanotubes on the su...

Embodiment 3

[0020] 1. Positive electrode material: Weigh 10 grams of polystyrene with a particle size of 50 nm and 40 grams of polystyrene with a particle size of 2.0 μm, add them to 1000 grams of ethanol solvent and stir evenly, then add 26.2 grams (0.1mol) of NiSO 4 ·6H 2 O, 28.1 g (0.1 mol) C O SO 4 ·7H 2 O, 15.1 g (0.1 mol) MnSO 4 , 30.0 grams (0.5mol) of urea, and then filter it to obtain an organic-inorganic structure composite material, then mix it with lithium carbonate 37.0 grams (0.5mol), and use 400 milliliters of tetrahydrofuran organic solvent to dissolve and remove the template. After filtration, Li( Ni x co y mn 1-x-y )O 2 (Denoted as: NCM) material, then place the above-mentioned dry NCM material in the reactor, feed nitrogen into the reactor, and heat to make the temperature in the reactor reach 1000 ° C, stop feeding nitrogen, and then feed Pass acetylene and ammonia into the reactor, keep it at 1200°C for 20 minutes, and grow carbon nanotubes on the surface of t...

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Abstract

A preparing method of a high-power high-energy density lithium ion battery is provided. According to the lithium ion battery, the cathode material is Li(Ni<0.6>Co<0.2>Mn<0.2>)O2 / carbon nanotube composite ternary material, the inner core is hollow, the outer core is of a double-layer structure, the first layer is Li(Ni<0.6>Co<0.2>Mn<0.2>)O2, and the outer layer is carbon nanotubes. The preparing method includes following steps: 1) preparing the cathode material and 2) preparing an anode material. The ternary material prepared by the preparing method is structured and uniform in morphology, large in particles, irregular in morphology, and high in conductivity. A particle gap is reduced, and compaction density and conductivity of the ternary material are improved. By a chemical vapor deposition method, the carbon nanotubes with high conductivity are deposited on the surface of the ternary material, thus further improving conductivity and rate performance of the lithium ion battery.

Description

technical field [0001] The invention relates to a preparation method of a lithium-ion battery with high power and high energy density, specifically preparing a hollow ternary material / carbon nanotube composite material through a template method. Background technique [0002] Lithium-ion batteries are a new generation of green energy storage batteries. They have outstanding advantages such as high voltage, high energy density, good cycle performance, small self-discharge, and no memory effect. They have been widely used in mobile phones, notebook computers, energy storage and other electronic products. . The positive electrode material is the key component material of the lithium-ion battery, and its performance determines the quality of the lithium-ion battery. [0003] The current positive electrode materials mainly include lithium iron phosphate, lithium cobaltate, lithium manganate and their ternary materials. Among them, lithium cobaltate is still the mainstream materia...

Claims

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Application Information

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IPC IPC(8): H01M10/058H01M4/139
CPCH01M4/139H01M10/0525H01M10/058Y02E60/10Y02P70/50
Inventor 丁建民
Owner JIANGSU LENENG BATTERY INC
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