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Lithium ion battery with high cycle performance

A lithium-ion battery, a certain amount of technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve problems such as structural collapse, poor conductivity, and material pulverization

Active Publication Date: 2021-04-02
重庆标能瑞源储能技术研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the above-mentioned deficiencies in the prior art, the present invention proposes a method for preparing negative electrode materials for lithium ion batteries, which solves the problems of poor electrical conductivity and volume expansion effect of NiO negative electrode materials for existing lithium ion batteries, which lead to material pulverization and structural collapse.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] (1) Add 5 mL of concentrated hydrochloric acid and 0.5 g of LiF to 8 mL of deionized water, and add 100 mg of Ti 3 AlC 2 Add a mixture of LiF and HCl, and react at 60°C to obtain accordion-shaped Ti 3 C 2 ; (2) Ti obtained by step (1) 3 C 2 Add 80mg of nickel nitrate and 10mg of acrylic acid to the suspension, 60 In the gamma rays produced by Co, the irradiation is carried out under the condition that the total dose of 100Gy / min is 800KGy; (3) the suspension in step (2) is poured into liquid nitrogen for rapid freezing, and then the obtained product is frozen Dry for 24 hours, and the temperature of the freeze dryer is -60° C.; (4) The product of step (3) is washed with deionized water and ethanol, and then kept at 600° C. for 40 minutes in a methane atmosphere.

[0015] The negative electrode material prepared in this example was used to prepare a negative electrode sheet, and a button battery was assembled with a lithium sheet as a counter electrode, and a consta...

Embodiment 2

[0017] (1) Add 8 mL of concentrated hydrochloric acid and 0.5 g of LiF to 10 mL of deionized water, and add 100 mg of Ti 3 AlC 2 Add a mixture of LiF and HCl, and react at 50°C to obtain accordion-shaped Ti 3 C 2 ; (2) Ti obtained by step (1) 3 C 2 Add 120mg of nickel nitrate and 10mg of acrylic acid to the suspension, 60 In the gamma rays produced by Co, the irradiation is carried out under the condition that the total dose of 100Gy / min is 900KGy; (3) the suspension in step (2) is poured into liquid nitrogen for rapid freezing, and then the obtained product is frozen Dry for 20 hours, and the temperature of the freeze dryer is -70° C.; (4) The product of step (3) is washed with deionized water and ethanol, and then kept at 500° C. for 40 minutes in a methane atmosphere.

[0018] The negative electrode material prepared in this example was used to prepare a negative electrode sheet, and a button battery was assembled with a lithium sheet as a counter electrode, and a cons...

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Abstract

The invention relates to a preparation method of a lithium ion battery negative electrode material, and a lithium ion battery. The preparation method of the negative electrode comprises the followingsteps: adding a certain amount of Ti3AlC2 into a mixed solution of LiF and HCl, and reacting to obtain accordion-shaped Ti3C2; adding Ni salt and acrylic acid into the obtained Ti3C2 turbid liquid, and carrying out irradiation in gamma rays generated by <60>Co; and pouring the turbid liquid into liquid nitrogen for quick freezing, then freeze-drying the obtained product, and finally coating the Ti3C2-NiO with a carbon layer by adopting a CVD method. According to the invention, the prepared composite material NiO particles are uniformly dispersed among three-dimensional accordion-shaped Ti3C2 sheet-shaped gaps, so that material pulverization and structure collapse caused by the volume expansion effect of NiO in the charging and discharging process are effectively relieved, and the conductivity of NiO is effectively improved through the Ti3C2 and CVD carbon layer.

Description

technical field [0001] The invention relates to the technical field of lithium-ion batteries, in particular to a method for preparing negative electrode materials for lithium-ion batteries and lithium-ion batteries. Background technique [0002] With the development of portable electronic devices and hybrid electric vehicles, the demand for batteries with high energy and high cycle performance is becoming increasingly urgent. A large number of researchers have invested in the exploration and research of lithium ion battery anode materials. Graphite is currently the most widely used commercial lithium-ion battery anode material. However, the theoretical capacity of graphite is only 375mAh / g, which can no longer meet the application needs of batteries in contemporary society. Compared with traditional graphite anode materials, NiO is quite abundant in storage and has a higher theoretical capacity, and is considered to be a promising anode material for lithium-ion batteries. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/52H01M4/62H01M10/0525
CPCH01M4/362H01M4/523H01M4/62H01M4/624H01M4/625H01M4/628H01M10/0525Y02E60/10
Inventor 高明
Owner 重庆标能瑞源储能技术研究院有限公司
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