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Making method of lithium ion battery

The technology of a lithium-ion battery and a manufacturing method is applied in the field of lithium-ion battery manufacturing, which can solve problems such as battery short circuit, achieve the effects of increasing electrical conductivity, low manufacturing cost, and suppressing the Jahn-Teller effect

Inactive Publication Date: 2016-07-13
SHAOXING UNIVERSITY +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since LiC 6 Due to the low potential of the structure, when the negative electrode graphite is insufficient or the positive electrode material is overcharged, or when a large current is charged and discharged, Li will be deposited in the form of metal on the surface of the negative electrode graphite to form lithium dendrites, which will penetrate the separator and lead to battery failure. Internal short circuit causing safety issues

Method used

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  • Making method of lithium ion battery
  • Making method of lithium ion battery
  • Making method of lithium ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Prepare the positive electrode material. Weigh a certain amount of raw materials such as lithium nitrate, aluminum nitrate, manganese dioxide, and lithium fluoride according to the molar ratio of Li:Al:Mn:F of 1:0.03:1.95:0.05, put the above raw materials into a ball mill tank, and put them into Agate grinding balls, adding ethanol additives, ball milling for 4 hours to obtain a mixed slurry, which was transferred into a sagger, put into a resistance wire horizontal tube furnace, and heated at 5°C min -1 The heating rate was heated to 750 °C, kept for 10 hours, then cooled to room temperature with the furnace, and crushed to obtain Li 1.05 Al 0.03 mn 1.95 o 3.95 f 0.05 Cathode material;

[0021] Preparation of negative electrode materials. Lithium carbonate and nano-titanium dioxide were selected as raw materials, and the raw materials were weighed according to the Li:Ti molar ratio of 4:5. Put the above raw materials into a ball mill jar, add 20% sucrose of the ...

Embodiment 2

[0026] Prepare the positive electrode material. Weigh a certain amount of lithium carbonate, aluminum nitrate, manganese dioxide, lithium fluoride and other raw materials according to the molar ratio of Li:Al:Mn:F of 1:0.03:1.95:0.05, put the above raw materials into a ball mill jar, and put them into agate Grinding balls, adding ethanol additives, and ball milling for 4 hours to obtain a mixed slurry, which was transferred into a sagger, put into a resistance wire horizontal tube furnace, and heated at 10°C min -1 The heating rate is heated to 750 °C, kept for 12 hours, then cooled to room temperature with the furnace, and crushed to obtain Li 1.05 Al 0.03 mn 1.95 o 3.95 f 0.05 Cathode material;

[0027] Preparation of negative electrode materials. Lithium carbonate and nano-titanium dioxide were selected as raw materials, and the raw materials were weighed according to the Li:Ti molar ratio of 4:5. Put the above raw materials into a ball mill jar, add 30% sucrose of t...

Embodiment 3

[0032] Prepare the positive electrode material. Weigh a certain amount of raw materials such as lithium carbonate, aluminum nitrate, manganese acetate, and lithium fluoride according to the molar ratio of Li:Al:Mn:F of 1:0.03:1.95:0.05, put the above raw materials into a ball mill jar, and put them into agate for grinding balls, added ethanol additives, and ball milled for 3 hours to obtain a mixed slurry, which was transferred into a sagger, put into a resistance wire horizontal tube furnace, and heated at 10°C min -1 The heating rate is heated to 700 °C, kept for 8 hours, then cooled to room temperature with the furnace, and crushed to obtain Li 1.05 Al 0.03 mn 1.95 o 3.95 f 0.05 Cathode material;

[0033] Preparation of negative electrode materials. Lithium carbonate and nano-titanium dioxide were selected as raw materials, and the raw materials were weighed according to the Li:Ti molar ratio of 4:5. Put the above raw materials into a ball mill jar, add sucrose with ...

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Abstract

The invention discloses a making method of a lithium ion battery, and concretely relates to a making method of a lithium ion battery adopting a doped and modified lithium manganate material as a positive electrode and a carbon coated lithium titanate material as a negative electrode. Aluminum and sulfur element doping modification of the lithium manganate material inhibits a Jahn-Teller effect; and the carbon coated lithium titanate material is adopted as the negative electrode, so the disadvantage of metal lithium dendrite precipitation induced by too low potential of a graphite negative electrode is solved, the discharge potential of the lithium manganate material is effectively restricted, and the integral cycle performances of the battery are greatly improved. The battery can be used in power batteries of electric cars and large energy storage batteries.

Description

technical field [0001] The invention belongs to the technical field of lithium ion batteries, and in particular relates to a manufacturing method of a lithium ion battery using a doped modified lithium manganate material as a positive electrode and a carbon-coated lithium titanate material as a negative electrode. Background technique [0002] Lithium-ion batteries have the advantages of high specific energy, high power, long service life, and low self-discharge rate. They have been widely used in portable electronic devices such as mobile phones, cameras, and notebook computers, and have also shown good performance in the field of electric vehicles. Application prospect. [0003] Spinel lithium manganese oxide (LiMn 2 o 4 ) has a three-dimensional tunnel structure, which is very suitable for the intercalation and extraction of lithium ions, and its theoretical specific capacity is 148mAh / g. Compared with other cathode materials such as lithium cobaltate and ternary, LiMn...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/1397
CPCY02E60/10
Inventor 王高军王象姜莉莉杨良凤钱佳佳
Owner SHAOXING UNIVERSITY
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