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Organic-inorganic polysulfide lithium cell positive pole material, producing method thereof, lithium cell positive pole, and lithium cell

A polysulfide, cathode material technology, applied in battery electrodes, lithium storage batteries, electrode manufacturing, etc., can solve the problems of unsatisfactory electronic conductivity, low degree of effective energy utilization, and inability to be practically applied, and achieves high utilization. The effect of large specific capacity and good electrical conductivity

Inactive Publication Date: 2008-04-23
PEKING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Chinese patents 90103614.5, 98813727.5, 02120846.8, 98813725.9, 01126834.4, 02120845.X, 01126835.2 introduce a variety of organic sulfide and organic polysulfide cathode materials, but due to the sulfur-containing organic or polymer cathode materials involved, there is no exception The molecular matrix composed of C, H, and O elements is combined with the S-S structure, so the electronic conductivity of the above materials is not ideal, and the existence of C, H, and O elements makes the material also have flammability safety hazards
In addition, the low degree of effective energy utilization and unsatisfactory cycle performance still prevent this type of material from being used in practical applications.

Method used

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  • Organic-inorganic polysulfide lithium cell positive pole material, producing method thereof, lithium cell positive pole, and lithium cell
  • Organic-inorganic polysulfide lithium cell positive pole material, producing method thereof, lithium cell positive pole, and lithium cell
  • Organic-inorganic polysulfide lithium cell positive pole material, producing method thereof, lithium cell positive pole, and lithium cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Will 80 copies [(NPS 3 ) 3 ] n product, 10 parts of acetylene black and 10 parts of polyethylene oxide (M w =2*10 5 ) was stirred in deionized water for 8 hours to obtain a homogeneously mixed positive electrode slurry, which was coated on a current collector aluminum foil (thickness 20 μm), and vacuum-dried at 60° C. for 24 hours to obtain a positive electrode for lithium batteries.

Embodiment 2

[0053] Will 70 parts [(NPS 3 ) 4 ] n product, 15 parts of acetylene black and 15 parts of polyethylene oxide (M w =2*10 5 ) was stirred in deionized water for 4 hours to obtain a homogeneously mixed positive electrode slurry, which was coated on a current collector aluminum foil (thickness 20 μm), and vacuum-dried at 65° C. for 20 hours to obtain a positive electrode for lithium batteries.

Embodiment 3

[0055] Will 90 parts [NPS 3 ] n product, 5 parts of acetylene black and 5 parts of polyethylene oxide (M w =2*10 5 ) was stirred in deionized water for 10 hours to obtain a homogeneously mixed positive electrode slurry, which was coated on a current collector aluminum foil (thickness 20 μm), and vacuum-dried at 80° C. for 30 hours to obtain a positive electrode for lithium batteries.

[0056] 156 g of LiCF in an argon glove box 3 SO 3 Added to the mixed solvent of DME (500mL) and DG (500mL), the LiCF 3 SO 3 After complete dissolution, the electrolyte solution required for testing the battery is obtained.

[0057] The above battery positive electrode, electrolyte solution, metal lithium (thickness 100 μm) and Celgard2400 separator were assembled in an argon glove box to form a battery for use. The test experiment of the above battery is as follows:

[0058] Carry out charge and discharge test with the battery in embodiment 1, charge and discharge current 25mA·g -1 , vo...

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Abstract

Belonging to technical area for producing lithium battery, the invention discloses anode material of lithium battery of organic-inorganic polysulfide, preparation method, anode of lithium battery, and lithium battery. Being composed of P, N, S three elements, the organic-inorganic polysulfide is in molecular formula as (NPSm)n. being used as anode material of lithium battery, the organic-inorganic polysulfide possesses features of high energy density, large specific capacity, high use ratio of active material, and good periodicity. A great lot N, P elements existed makes material possess safety of fire retardation. Solitary electron existed in N, P elements, and conjugated double bond existed in polymer molecule makes material possess better conducting power. The invention has great application foreground.

Description

technical field [0001] The invention belongs to the field of lithium battery manufacturing technology, and in particular relates to a kind of inorganic polysulfide lithium battery cathode material, as well as the preparation of the material and the lithium battery manufactured by using the material. Background technique [0002] Lithium metal has extremely high energy density and the most negative electrode potential, and its theoretical specific capacity has reached 3860mAh·g -1 , so lithium metal batteries have great application prospects. Most of the positive electrode materials commonly used in lithium battery systems are transition metal oxides such as lithium manganese oxide, lithium cobalt oxide, lithium nickel oxide, etc., and the general specific capacity does not exceed 200mAh g -1 , so the low energy density of cathode materials limits the further development of lithium batteries, and there is an urgent need to find new cathode materials with higher energy densit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36H01M4/60H01M4/04H01M10/36H01M4/137H01M10/052
CPCY02E60/12Y02E60/10
Inventor 徐国祥其鲁闻雷陈永翀晨辉安平
Owner PEKING UNIV
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