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Lithium ion capacitor graphene composite positive plate manufacturing method

A lithium ion and positive electrode technology, which is applied in the manufacture of hybrid capacitor electrodes and hybrid/electric double layer capacitors, can solve the problems of complex process and difficult manufacturing process, simplify the preparation process, achieve energy density and high power density, The effect of high energy density and high power density

Inactive Publication Date: 2017-09-22
肖丽芳
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These pre-doping methods involve relatively complicated processes and require special treatment of raw materials, which brings certain difficulties to the manufacturing process.

Method used

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  • Lithium ion capacitor graphene composite positive plate manufacturing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) Will Li 2 CO 3 and MoO 3 Mix according to the molar ratio of 1:1, mix evenly and put it in a muffle furnace for 3 hours at 500°C to react, and after the reaction, Li 2 MoO 4 .

[0021] (2) will get Li 2 MoO 4 Put it into a muffle furnace protected by a hydrogen-nitrogen mixture with a volume concentration of 5% hydrogen and react at 500 ° C for 5 hours. After the reaction, Li 2 MoO 3 Material.

[0022] (3) Set the specific surface area to 800m 2 The graphene material of / g joins in the NMP and forms 1g / L graphene suspension;

[0023] (4) Li 2 MoO 3 After the material was ball milled for 30 minutes, it was added to the obtained graphene suspension at a mass ratio of 50:1, and the graphene composite Li was obtained after suction filtration and evaporation of the solution. 2 MoO 3 material electrodes.

[0024] (5) Add graphite negative electrode material, conductive agent Ketjen black, and binder PVDF into NMP in a mass ratio of 90:5:5 to form a slurry, t...

Embodiment 2

[0027] (1) Will Li 2 CO 3 and MoO 3 Mix according to the molar ratio of 2:1, mix evenly and put it into the muffle furnace for 8 hours at 700°C to react. After the reaction, Li 2 MoO 4 .

[0028] (2) will get Li 2 MoO 4 Put it into a muffle furnace protected by a hydrogen-nitrogen mixed gas atmosphere with a volume concentration of 5% hydrogen at 900 ° C for 10 hours. After the reaction, Li 2 MoO 3 Material.

[0029] (3) Set the specific surface area to 1500m 2 The graphene material of / g joins in the NMP and forms 20g / L graphene suspension;

[0030] (4) Li 2 MoO 3 After the material was ball milled for 60 minutes, it was added to the obtained graphene suspension at a mass ratio of 5:1, and the graphene composite Li was obtained after suction filtration and evaporation of the solution. 2 MoO 3 material electrodes.

[0031] (5) Add hard carbon negative electrode material, conductive agent Ketjen black, and binder PVDF into NMP in a mass ratio of 90:5:5 to form a s...

Embodiment 3

[0034] (1) Will Li 2CO 3 and MoO 3 Mix according to the molar ratio of 1.3:1, mix evenly and put it into the muffle furnace for 7 hours at 600°C to react, and after the reaction, Li 2 MoO 4 .

[0035] (2) will get Li 2 MoO 4 Put it into a muffle furnace protected by a hydrogen-nitrogen mixture with a volume concentration of 5% hydrogen at 700 ° C for 8 hours, and obtain Li after the reaction is complete. 2 MoO 3 Material.

[0036] (3) Set the specific surface area to 1200m 2 The graphene material of / g joins in the NMP and forms 10g / L graphene suspension;

[0037] (4) Li 2 MoO 3 After the material was ball milled for 40 minutes, it was added to the obtained graphene suspension at a mass ratio of 25:1, and the graphene composite Li was obtained after suction filtration and evaporation of the solution. 2 MoO 3 material electrodes.

[0038] (5) Add graphite negative electrode material, conductive agent Ketjen black, and binder PVDF into NMP in a mass ratio of 90:5:5...

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Abstract

The invention provides a lithium ion capacitor graphene composite positive plate manufacturing method. The method comprises the following several steps: (1) Li2CO3 and MoO3 are mixed uniformly, the mixture is put in a muffle furnace for reaction, and after the reaction is over, a Li2MoO4 material is obtained; (2) the obtained Li2MoO4 is put in the muffle furnace under atmosphere protection of a mixed gas containing hydrogen and nitrogen for reaction, and after the reaction is over, a Li2MoO3 material is obtained; (3) a graphene material with a high specific surface area is added to NMP to form a graphene suspension; and (4) the Li2MoO3 material is subjected to ball milling and is then added to the obtained graphene suspension, after air pump filtration and evaporation are carried out on the solution, a graphene composite Li2MoO3 material positive plate is obtained. The graphene composite Li2MoO3 material positive plate has high strength, high conductivity and high specific surface area and can effectively replace a conventional activated carbon positive material and an aluminum current collector, and high energy density and high power density are realized.

Description

technical field [0001] The invention belongs to the technical field of lithium-ion supercapacitors, and relates to a method for preparing positive plates of lithium-ion supercapacitors. Background technique [0002] In recent years, lithium-ion secondary batteries have been greatly developed. Carbon materials such as graphite are generally used for the negative electrode of this battery, and lithium-containing metal oxides such as lithium cobalt oxide and lithium manganese oxide are used for the positive electrode. After the battery is assembled, the negative electrode supplies lithium ions to the positive electrode when charging, and the lithium ions from the positive electrode return to the negative electrode when discharging, so it is called a "rocking chair battery". Compared with lithium batteries using metallic lithium, this battery is characterized by high safety and high cycle life. [0003] However, the cycle life of lithium-ion secondary batteries is still restric...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/32H01G11/46H01G11/50H01G11/86
CPCY02E60/13H01G11/32H01G11/46H01G11/50H01G11/86
Inventor 肖丽芳钟玲珑
Owner 肖丽芳
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