Method for preparing composite carbon cathode material for super-capacitor battery

A technology for supercapacitor batteries and anode materials, applied in the field of electrochemistry, can solve the problems affecting the high rate of supercapacitor batteries, large capacity and high energy density performance, inability to maximize supercapacitor batteries, poor conductivity of lithium titanium oxide, etc. problems, to achieve good lithium-ion intercalation/de-cycling performance, excellent capacitor energy storage performance, and good high-rate charge-discharge performance

Inactive Publication Date: 2010-06-30
CENT SOUTH UNIV +1
View PDF2 Cites 19 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When these anode materials are applied to supercapacitor batteries, they have many disadvantages due to the limitations of their materials: ①The material structure is single, and the form of energy storage is single, which cannot maximize the performance characteristics of the supercapacitor battery's "dual functions", that is, it cannot be used at the same time. The combination of lithium ion chemical energy storage and electric double layer physical energy storage can achieve the purpose of high energy density and high power density; ②Due to the single material, the defects of the mater

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

[0038] 1. Mixing the surface nano-sized natural graphite and resin in a ratio of 1:1 by weight, and at the same time,

[0039] Add NaOH template agent whose particle size distribution is 1-2nm, medium particle 5-50nm, large particle 60-100nm, ethanol and mix thoroughly, then evaporate to dryness at a low temperature of 50-60°C to obtain the precursor;

[0040] 2. Put the prepared precursor under the protective atmosphere of ammonia gas, first according to the heating system of 5-10°C / min,

[0041] Heating to 200°C, constant temperature for 2 hours, then heating to 600°C at a heating rate of 1-5°C / min, constant temperature for 2 hours; then cooling with the furnace; the core-shell material of the three-dimensional hierarchical hole shell coated with micropores is obtained The pore size distribution of the micropores is as follows: the pore size of the macropore is 50-120nm, the pore size of the medium pore is 3-50nm, and the pore size of the small pore is less than 2nm.

[004...

Embodiment 2

[0056] 1. Mix the surface nano-sized natural graphite and coal tar in a ratio of 3:1 by weight, and at the same time, add SiO with a particle size distribution of 1-2nm for particles, 5-50nm for medium particles, and 60-100nm for large particles 2 After the template agent and acetone are fully mixed, evaporate to dryness at a low temperature of 70-80°C to obtain the precursor;

[0057] 2. Under the protective atmosphere of nitrogen and hydrogen (nitrogen:hydrogen = 1:1), heat the prepared precursor to 300°C at a heating rate of 5-10°C / min, keep the temperature for 3 hours, and then press 1-5 ℃ / min heating system to 700 ℃, constant temperature for 6h; then cool with the furnace; obtain core-shell material with three-dimensional hierarchical hole shell covered with micropores; the pore size distribution of the micropores is: the pore size of the macropores is 50-120nm, medium pore diameter is 3-50nm, and small pore diameter is less than 2nm.

[0058] 3. Removal of template agen...

Embodiment 3

[0071] 1. Mix the surface nano-sized natural graphite and asphalt in a ratio of 10:1 by weight. At the same time, add Ni(OH) with a particle size distribution of 1-2nm for particles, 5-50nm for medium particles, and 60-100nm for large particles. 2 After fully mixing the template agent and methanol, evaporate to dryness at a low temperature of 90-100°C to obtain the precursor;

[0072] 2. Under the protective atmosphere of argon, heat the prepared precursor to 400°C at a heating rate of 5-10°C / min, keep the temperature for 5 hours, and then heat it to 800°C at a heating rate of 1-5°C / min , constant temperature for 10h; then cool with the furnace; obtain the core-shell material of the three-dimensional layered hole shell coated with micropores on the core material; the micropore diameter distribution is: the macropore diameter is 50-120nm, the mesopore diameter is 3- 50nm, the small hole diameter is less than 2nm.

[0073] 3. Removal of template agent: use dilute nitric acid to...

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
Particle sizeaaaaaaaaaa
Pore diameteraaaaaaaaaa
Small hole diameteraaaaaaaaaa
Login to view more

Abstract

The invention relates to a high-rate lithium-ion battery and a method for preparing a composite carbon cathode material for a super-capacitor battery. The method comprises the following steps: coating a surface-nano-crystallized core with a porous carbon coat provided with macro-pore/meso-pore/micro-pore three-dimensional layer pores; doping metal particles on the surface of the coat; and carrying out low-potential treatment, wherein the three steps are sequentially achieved by a template-based method, a combined method comprising dipping, chemical plating and physical mixing, and an electrochemical method of lithium pre-doping respectively. The process of the invention has the advantages of simple method and convenient operation; the prepared material has a core-coat structure and doped metallic elements, and meanwhile, the material has good performance in double-layer electric energy storage and lithium-ion intercalation and de-intercalation energy storage and effectively improves the high-rate performance and power density of the lithium-ion battery; the material meets the requirements of super-capacitor batteries in both the lithium-ion energy storage and double-layer electric energy storage of the cathode material; accordingly, the material can be used as the cathode of a high-performance lithium-ion battery; and the material has good performance in high-rate charging/discharging, so the material has a good prospect for industrialization.

Description

technical field [0001] The invention discloses a method for preparing a carbon-based composite negative electrode material for a supercapacitor battery; in particular, it refers to the preparation of a carbon-based composite negative electrode material for a supercapacitor battery that can be charged and discharged at a large rate and has high power density and high energy density method. It belongs to the field of electrochemical technology. Background technique [0002] The increasingly serious global environmental pollution and energy crisis have forced countries to find new sustainable energy sources. Green energy storage devices represented by lithium-ion batteries and supercapacitors have become the focus of attention and research hotspots. Although supercapacitors have the advantages of high power density and long cycle life, their energy density is relatively low; while lithium-ion batteries have the characteristics of high energy density and low self-discharge, but...

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): H01G9/00H01G9/042H01M14/00
Inventor 周向阳李劼杨娟刘宏专娄世菊
Owner CENT SOUTH UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap