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Energy storage battery based on lithium ion conduction and preparation method (thereof)

A technology of an energy storage battery and a manufacturing method, applied in the field of electrochemistry, can solve the problems of high price of metal lithium materials, limited service life and safety, poor thermal stability, etc., and achieve excellent cycle performance, high energy density, and good safety performance. Effect

Inactive Publication Date: 2009-04-22
SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the cost, service life and safety problems caused by the volume effect of graphite materials during charging and discharging, the deposition of metal lithium easily during overcharging, the high price of lithium cobaltate materials, and poor thermal stability restrict the use of lithium-ion batteries. Application of large energy storage devices

Method used

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  • Energy storage battery based on lithium ion conduction and preparation method (thereof)
  • Energy storage battery based on lithium ion conduction and preparation method (thereof)
  • Energy storage battery based on lithium ion conduction and preparation method (thereof)

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] First, add polyvinylidene fluoride to an appropriate amount of N-methylpyrrolidone, stir and dissolve to make a glue solution for use. The negative electrode active material Li 4 Ti 5 o 12 After mixing with carbon black, add it to the above glue (Li 4 Ti 5 o 12 : superconducting carbon black: mass percent of polyvinylidene fluoride=90:5:5), after fully stirring and mixing, evenly apply on both sides of aluminum foil (thickness is 20 μ m), make negative electrode sheet. Similarly, the positive electrode active material LiMn 2 o 4 After mixing with carbon black, add it to the above glue (LiMn 2 o 4 : carbon black: mass percent of polyvinylidene fluoride=92:5:3), after fully stirring and mixing, evenly apply on both sides of aluminum foil (thickness is 20 μ m), make positive electrode sheet.

[0020] The positive and negative electrode sheets prepared above were dried under vacuum at 80° C. for 8 hours, then rolled and cut. After the cut positive and negative ele...

Embodiment 2

[0023] First, polyvinylidene fluoride is added to an appropriate amount of N-methylpyrrolidone, stirred and dissolved to make a glue solution for use. The negative electrode active material Li 4 Ti 5 o 12 Mix with carbon black and add to the above glue (Li 4 Ti 5 o 12 : carbon black: mass percentage of polyvinylidene fluoride=75:15:10), after fully stirring and mixing, evenly apply on both sides of aluminum foil (thickness is 15 μ m), make negative pole sheet. Similarly, the positive electrode active material LiFePO 4 Mix with carbon black and add to the above glue (LiFePO 4 : carbon black: mass percent of polyvinylidene fluoride=80:12:8), after fully stirring and mixing, evenly apply on both sides of aluminum foil (thickness is 30 μ m), make positive electrode sheet.

[0024] The positive and negative electrode sheets prepared above were vacuum-dried at 80° C. for 6 h, rolled and punched. After the positive and negative plates are separated by a diaphragm, they are st...

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Abstract

The invention provides an energy storage battery based on lithium ion, the difference with the traditional lithium ion battery system is that the energy storage battery is characterized in that lithium titanate (Li4Ti5O12) having spinel structure substitutes graphite (C6) having layer-shaped structure to be used as a negative active material; and lithium manganese (LiMn2O4) having the spinel structure or lithium iron phosphate (LiFePO4) having olivine structure substitutes lithium cobalt (LiCoO2) having the layer-shaped structure to be used as the positive active material. A main body positive active material or a positive main body active material is uniformly mixed with soot carbon and a caking agent to be coated on aluminium foil to be made into positive and negative films to be made into the energy storage battery. Compared with traditional lithium ion battery system, the Li4Ti5O12 / LiMn2O4 (or LiFePO4) system lithium ion has a higher energy density, excellent cycling performance, good safety performance and high efficient percentage performance, and is suitable for the requirements of large-scale energy storage batteries.

Description

technical field [0001] The invention belongs to the technical field of electrochemistry, and specifically relates to a high-performance lithium-ion energy storage battery based on lithium-ion conduction and a manufacturing method thereof. Background technique [0002] With the increasing popularity of renewable energy, such as wind energy, solar energy, and fuel cells, and the urgent need for grid peak regulation, improving grid reliability, and improving power quality, the importance of power storage systems has become increasingly prominent. Large-capacity energy storage systems can also be used in residential quarters, hospitals, large enterprises, military, etc. as emergency power sources. Therefore, the application prospect of electric energy storage technology is very broad. [0003] Current energy storage methods can be divided into chemical energy storage and physical energy storage. Among them, chemical energy storage methods mainly include lead-acid batteries, re...

Claims

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Application Information

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IPC IPC(8): H01M10/36H01M10/40H01M4/58H01M10/38
CPCY02E60/122Y02E60/10Y02P70/50
Inventor 张建颜剑张熙贵刘浩涵李佳夏保佳
Owner SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI