Unlock instant, AI-driven research and patent intelligence for your innovation.

Lithium ion negative electrode material preparation method and product

A negative electrode material, lithium ion technology, applied in the field of lithium ion battery negative electrode materials and its preparation, can solve the problems affecting the electrochemical performance of materials, electrode and electrolyte side reactions, etc., to achieve good electrochemical performance and structural stability, inhibit Response, Favorable Transmission Effect

Active Publication Date: 2018-12-25
WUHAN MARINE ELECTRIC PROPULSION RES INST CHINA SHIPBUILDING IND CORP NO 712 INST
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, these simple metal oxides also expose some disadvantages during the cycling of lithium-ion batteries: first, the structure has a large volume change with the intercalation and extraction of lithium ions, and in addition, the nanomaterials are prone to agglomeration, High specific surface area can promote side reactions between electrodes and electrolyte, affecting the electrochemical performance of these materials

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Lithium ion negative electrode material preparation method and product
  • Lithium ion negative electrode material preparation method and product
  • Lithium ion negative electrode material preparation method and product

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] (1) Weigh 12.607g oxalic acid (molecular formula H 2 C 2 o 4 2H 2 O) Dissolve in distilled water / deionized water, and configure it into a 0.4mol / L oxalic acid solution in a 250ml volumetric flask; weigh 19.212g of citric acid (molecular formula C 6 h 8 o 7 ) was dissolved in distilled water / deionized water, and made into a 0.4mol / L citric acid solution in a 250ml volumetric flask, and the above two solutions were mixed and placed in the reaction kettle as the bottom solution.

[0030] (2) Then weigh 12.245g cobalt salt (molecular formula is Co(CH 3 COO) 2 4H 2 O) Dissolve in distilled water / deionized water, and make a 0.2mol / L cobalt acetate solution in a 250ml volumetric flask. Use a peristaltic pump to add cobalt acetate solution dropwise to the bottom liquid at a flow rate of 6-20ml / min to form a precipitate. The temperature of this process is controlled within the range of 20-30°C, and the stirring speed is controlled at 500-1000r / min. Finally, aging for 30...

Embodiment 2

[0038] 1) Weigh 25.214g oxalic acid (molecular formula H 2 C 2 o 4 2H 2 O) Dissolved in distilled water / deionized water, and configured into a 0.8mol / L oxalic acid solution in a 250ml volumetric flask; weigh 19.212g of citric acid (molecular formula C 6 h 8 o 7 ) was dissolved in distilled water / deionized water, and made into a 0.4mol / L citric acid solution in a 250ml volumetric flask, and the above two solutions were mixed and placed in the reaction kettle as the bottom solution.

[0039] (2) Then weigh 12.245g cobalt salt (molecular formula is Co(CH 3 COO) 2 4H 2 O) Dissolve in distilled water / deionized water, and make a 0.2mol / L cobalt acetate solution in a 250ml volumetric flask. Use a peristaltic pump to add cobalt acetate solution dropwise to the bottom liquid at a flow rate of 6-20ml / min to form a precipitate. The temperature of this process is controlled within the range of 20-30°C, and the stirring speed is controlled at 500-1000r / min. Finally, aging for 30-6...

Embodiment 3

[0047] 1) Weigh 12.607g oxalic acid (molecular formula H 2 C 2 o 4 2H 2 O) Dissolve in distilled water / deionized water, and configure it into a 0.4mol / L oxalic acid solution in a 250ml volumetric flask; weigh 19.212g of citric acid (molecular formula C 6 h 8 o 7 ) was dissolved in distilled water / deionized water, and made into a 0.4mol / L citric acid solution in a 250ml volumetric flask, and the above two solutions were mixed and placed in the reaction kettle as the bottom solution.

[0048] (2) Then weigh 12.245g cobalt salt (molecular formula is Co(CH 3 COO) 2 4H 2 O) Dissolve in distilled water / deionized water, and make a 0.2mol / L cobalt acetate solution in a 250ml volumetric flask. Use a peristaltic pump to add cobalt acetate solution dropwise to the bottom liquid at a flow rate of 6-20ml / min to form a precipitate. The temperature of this process is controlled within the range of 20-30°C, and the stirring speed is controlled at 500-1000r / min. Finally, aging for 30-...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses a lithium ion negative electrode material preparation method. A co-precipitation method and a high-temperature calcination method are adopted for preparation, a micron rodlikeprecursor formed by co-precipitation reaction is subjected to calcining decomposition to generate nano particles, and then a spinel-type material (CoxM1-x)3O4 in a porous structure is formed; the nanoparticles are assembled in a one-dimensional rodlike substrate to obtain a nano / micron rodlike hierarchical negative electrode material. By a one-dimensional porous material, the contact area of thematerial and electrolyte and active sites of electrochemical reaction are increased, lithium ion transmission is benefited, reaction between the material and electrolyte can be effectively inhibited,and an electrode structure in a charging and discharging process is stabilized.

Description

technical field [0001] The invention belongs to the technical field of material synthesis, and relates to a lithium ion battery negative electrode material, a preparation method and a product thereof. Background technique [0002] Lithium-ion batteries have become the fastest growing and most valued new energy storage devices. The energy density, power density and cycle life of lithium-ion batteries need to be further improved. The theoretical specific capacity of commercial graphite anode materials is only 372mAhg ～1 , it is obviously difficult to meet the increasing demand for lithium-ion battery performance. [0003] Nanostructured transition metal composite oxides, such as Co 3 o 4 , Fe 3 o 4 , MnO 2 , Mn 3 o 4 The discharge specific capacity is high, the cost is low, and the nanostructure increases the contact area between the material and the electrolyte, shortens the diffusion path of lithium ions, and has good electrochemical performance. [0004] However, ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C01G45/12C01G51/00H01M4/50H01M4/52H01M10/0525B82Y40/00
CPCB82Y40/00C01G45/1207C01G51/00C01P2004/03C01P2004/04C01P2004/16H01M4/50H01M4/52H01M10/0525H01M2004/021Y02E60/10
Inventor 王磊吴军张祥功代化隋鑫
Owner WUHAN MARINE ELECTRIC PROPULSION RES INST CHINA SHIPBUILDING IND CORP NO 712 INST