Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Lithium ion battery negative electrode bamboo charcoal material prepared from natural product

A lithium-ion battery and natural product technology, applied in the field of lithium-ion batteries, can solve problems affecting electrochemical performance and achieve excellent cycle performance, high safety, and good tolerance

Inactive Publication Date: 2018-01-23
绵阳梨坪科技有限公司
View PDF4 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as a carbon material prepared from a biological carbon source, bamboo charcoal contains more metal elements and other impurities, which greatly affect its electrochemical performance.

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] (1) Pre-fire bamboo charcoal at 450°C for 48 hours;

[0019] (2) Grind the pre-fired bamboo carbon material to an average particle size of 2 mm, then place the material in a ball mill tank to control the mass of the ball and the mass of the material at 15:1, and mill at a rotation rate of 400 rpm for 1 hour until Average particle size 7μm;

[0020] (3) Place the bamboo carbon particles obtained in step (2) in sulfuric acid and heat to 80°C for 18 hours at a constant temperature. The ratio of bamboo carbon to sulfuric acid is 1:30 (w / v), and the concentration of sulfuric acid is 98%. The treated bamboo The carbon is washed with deionized water until the washing solution is neutral, and dried at 80°C;

[0021] (4) Add the bamboo charcoal obtained in step (3) to 50% of its mass of spherical carbon for high-temperature calcination. The calcination temperature is 900°C, the calcination time is 5 hours, the calcination atmosphere is nitrogen, and the heating rate is 1°C / min,...

Embodiment 2

[0023] (1) Pre-burn bamboo charcoal at 430°C for 50 hours;

[0024] (2) Grind the pre-fired bamboo carbon material to an average particle size of 3 mm, then place the material in a ball mill tank to control the mass of the ball and the mass of the material at 15:1, and mill at a rotation rate of 400 rpm for 1 hour until Average particle size 7μm;

[0025] (3) Place the bamboo carbon particles obtained in step (2) in sulfuric acid and heat to 60°C for 20 hours at a constant temperature. The ratio of bamboo carbon to sulfuric acid is w / v=1:33, and the concentration of sulfuric acid is 95%. The treated bamboo carbon Wash with deionized water until the lotion is neutral, and dry at 60°C;

[0026] (4) Add the bamboo charcoal obtained in step (3) to 80% of its mass of spherical carbon for high-temperature calcination. The calcination temperature is 880°C, the calcination time is 5.2 hours, the calcination atmosphere is nitrogen, and the heating rate is 1°C / min, to obtain the final ...

Embodiment 3

[0028] (1) Pre-fire bamboo charcoal at 460°C for 45 hours;

[0029] (2) Grind the pre-fired bamboo carbon material to an average particle size of 3 mm, then place the material in a ball mill tank to control the mass of the ball and the mass of the material at 15:1, and mill at a rotation rate of 400 rpm for 1 hour until Average particle size 7μm;

[0030] (3) Place the bamboo carbon particles obtained in step (2) in sulfuric acid and heat to 90°C for 16 hours at a constant temperature. The ratio of bamboo carbon to sulfuric acid is w / v=1:25, and the concentration of sulfuric acid is 95%. The treated bamboo carbon Wash with deionized water until the lotion is neutral, and dry at 50°C;

[0031] (4) Add the bamboo charcoal obtained in step (3) to 70% of its mass of spherical carbon for high-temperature calcination. The calcination temperature is 920°C, the calcination time is 4.8 hours, the calcination atmosphere is nitrogen, and the heating rate is 1°C / min. product.

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

No PUM Login to View More

Abstract

The invention discloses a lithium ion battery negative electrode bamboo charcoal material prepared from a natural product. The bamboo charcoal material is obtained by using moso bamboo as a raw material, pre-calcining, smashing and ball-milling the moso bamboo into granules, using sulfuric acid to soak the granules, heating, cleaning, adding ball carbon and continuing calcining. The bamboo charcoal material is stable in structure and high in specific capacity; metal elements in the bamboo charcoal material are removed through acid treatment, so that the bamboo charcoal material is nonsensitiveto electrolyte and high in safety.

Description

technical field [0001] The invention relates to the technical field of lithium ion batteries, in particular to a lithium ion battery negative electrode material and a preparation method thereof. Background technique [0002] With the development of electronic technology and information industry, especially various portable electronic devices such as mobile phones, cameras, notebook computers, etc. are developing in the direction of high performance and miniaturization, people need high-performance power as a power guarantee. Due to the advantages of high voltage, high energy density, small self-discharge, long cycle life, no pollution and no memory effect, lithium-ion batteries have been widely used in electrical equipment such as mobile phones, notebook computers, and small cameras. Fields such as satellites, aerospace, and space military have also shown good application prospects and potential economic benefits. [0003] In 1990, Japan's Sony Corporation first used carbon...

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
IPC IPC(8): C01B32/05H01M4/587H01M10/0525
CPCY02E60/10
Inventor 朱德康
Owner 绵阳梨坪科技有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com