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

Electrochemical ultra-capacitor taking lithium ion battery electrode material as cathode

A supercapacitor, electrochemical technology, applied in the field of capacitors, can solve the problems of poor cycle life, difficult to popularize and apply, and expensive Ru and Ir

Inactive Publication Date: 2005-06-29
FUDAN UNIV
View PDF1 Cites 19 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Mature materials include oxides of Ru and Ir, but Ru and Ir are expensive and difficult to popularize and apply
Supercapacitors with organic polymer (polyaniline, polythiophene, etc.) doping-dedoping quasi-capacitance as the main mechanism have improved specific energy, but the problem is that the cycle life is poor
However, in the above-mentioned patent, lithium titanium oxide is an insulator, and the particle size is not specified. It is very difficult to apply it as a material for high-power electrochemical capacitors.

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
  • Electrochemical ultra-capacitor taking lithium ion battery electrode material as cathode

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Negative electrode Li prepared by solvent dispersion method 4 Ti 5 o 12 Material. First, the titanium compound and the lithium compound are uniformly dispersed and ground with a solvent, and then calcined at 300-1000° C. for 6-48 hours to obtain a product with a particle size of 200 nm. The composition of the negative electrode of the capacitor is according to Li 4 Ti 5 o 12 : conductive agent: binder = 65: 25: 10 weight ratio mixing slurry, then control a certain coating thickness, evenly coated on the aluminum foil current collector. The activated carbon used as the positive electrode material is commercial activated carbon, and the slurry is mixed according to the weight ratio of activated carbon: conductive agent: binder = 80: 10: 10, and then coated on the aluminum foil current collector with a certain thickness. In this embodiment, the coating thickness of the positive and negative electrodes is controlled with the negative electrode material utilization rat...

Embodiment 2

[0021] According to the coating requirements of positive activated carbon in Example 1, a symmetrical 7# (φ10*38L, mm) activated carbon capacitor was assembled, and its diaphragm and electrolyte were the same as in Example 1. The working range of the system is 0V-2.6V, and the discharge curve of the capacitor is as follows figure 1 shown. The discharge capacity is 5Ah, and the average working voltage is 1.3V. The charge and discharge rate characteristics and cycle performance are shown in Table 1.

Embodiment 3

[0023] Negative electrode Li prepared by solid-phase synthesis method 4 Ti 5 o 12 Material. After the titanium compound and the lithium compound are ground uniformly, they are calcined at 300-1000° C. for 6-48 hours to obtain the product. The material has a particle size of 1 μm. Prepare capacitor negative pole and positive pole according to the slurry mixing and coating method in embodiment 1, control negative pole utilization rate 60% equally, make 7# capacitor (φ 10*38L, mm), its diaphragm and electrolytic solution are all the same as embodiment 1. Its characteristics are detailed in Table 1. The system of Example 3 has a specific energy of 3.3Wh / kg, a capacity of 7.6Ah when charged and discharged at 5C, and a capacity of 3.0Ah when charged and discharged at 100C, and a capacity retention rate of 87% after 3000 cycles.

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
Login to View More

Abstract

This invention belongs to capacitor technique field, which in detail is a new electrochemistry super capacitor. The capacitor combines the ion imbed to off imbed mechanism of the lithium ion battery and the double electric layers mechanism into one energy storage device, wherein its negative electrode adopts lithium ion imbed compound material with low imbed level and the positive electrode adopts active carbon or hole carbon to form an anisomerous super capacitor. Its negative electrode materials adopts nanometer sharp crystal rock Li#-[8x / (x+4)]Ti#-[8 / (x+4)]O#-[4] or one or multiple other metal elements mixed compound.

Description

technical field [0001] The invention belongs to the technical field of capacitors, and in particular relates to a novel high-performance electrochemical supercapacitor. Background technique [0002] With the continuous development of the economy, it will inevitably lead to the depletion of oil resources, environmental pollution, and the aggravation of global warming. The development of new energy and the comprehensive and efficient development and utilization of energy-saving technology and environmental technology have become a very necessary subject. The development of electric vehicles is imperative, and countries around the world are actively developing fuel cell electric vehicles (FCEV). However, the fuel cell output power (W / Kg) is small and cannot meet the requirements of starting, acceleration and climbing. It must be combined with other secondary batteries or capacitors with long cycle life, high energy density and high current charge and discharge. For example, T...

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): H01G9/042H01G11/50H01M4/58H01M14/00
CPCY02E60/10Y02E60/13
Inventor 夏永姚程亮李会巧
Owner FUDAN UNIV
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