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Preparation method of three-dimensional conductive super-iron battery K2FeO4/C composite negative pole material

A composite cathode material, high-speed iron technology, applied in battery electrodes, circuits, electrical components and other directions, can solve the problems of reduced potassium ferrate utilization rate and discharge efficiency, poor conductivity of decomposition products, poor conductivity of discharge products, etc., to improve stability And conductivity, application and development prospects are bright, and the effect of improving utilization

Inactive Publication Date: 2013-08-21
JIANGXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] Ferrate is used as the positive electrode material of the battery. In the alkaline electrolyte, due to the partial decomposition of potassium ferrate, the conductivity of the decomposition product is poor, which reduces the utilization rate and discharge efficiency of potassium ferrate; and due to the discharge of potassium ferrate The poor conductivity of the product hinders the use of ferrate in secondary batteries

Method used

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  • Preparation method of three-dimensional conductive super-iron battery K2FeO4/C composite negative pole material
  • Preparation method of three-dimensional conductive super-iron battery K2FeO4/C composite negative pole material

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Embodiment 1

[0017] After preparing the crude product of potassium ferrate by wet chemical oxidation, before potassium ferrate recrystallization, in potassium ferrate solution, add 0.01 gram of cetyltrimethylammonium bromide and 0.5 gram of acetylene black, After cetyltrimethylammonium bromide is dissolved, 12 mol / L of KOH solution is added to the solution to make K 2 FeO 4 The / C composite crystallized out. After being washed with n-hexane, absolute ethanol and anhydrous ether, it was dried under reduced pressure at room temperature.

Embodiment 2

[0019] After preparing the crude product of potassium ferrate by wet chemical oxidation, before potassium ferrate recrystallization, in potassium ferrate solution, add 0.01 gram of cetyltrimethylammonium bromide and 0.5 gram of acetylene black, After cetyltrimethylammonium bromide is dissolved, 12 mol / L of KOH solution is added to the solution to make K 2 FeO 4 The / C composite crystallized out. After being washed with n-hexane, absolute ethanol and anhydrous ether, it was dried under reduced pressure at 50°C.

Embodiment 3

[0021] After the crude product of potassium ferrate was prepared by wet chemical oxidation, before recrystallization of potassium ferrate, 0.01 g of cetyltrimethylammonium bromide and 0.5 g of conductive carbon black were added to the potassium ferrate solution , after cetyltrimethylammonium bromide is dissolved, then add 12 mol / L KOH solution to the solution to make K 2 FeO 4 The / C composite crystallized out. After being washed with n-hexane, absolute ethanol and anhydrous ether, it was dried under reduced pressure at 50°C.

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Abstract

The invention relates to a preparation method of a three-dimensional conductive super-iron battery K2FeO4 / C composite negative pole material. According to the method, a surface active agent and a nanocarbon material are added into potassium ferrate during the crystallization of the potassium ferrate through an in-situ co-precipitation method, so that the nanocarbon material is embedded into potassium ferrate crystal, and the three-dimensional conductive composite material is formed. The method has the advantages of simple processes, low material cost and processing cost, simple preparation processes, short cycle, low energy consumption, and capability of large scale production.

Description

technical field [0001] The invention relates to a method for manufacturing a positive electrode of a high-iron battery, in particular to a three-dimensional conductive high-iron battery K 2 FeO 4 / C composite cathode material preparation method. Background technique [0002] Batteries that use hexavalent iron compounds as cathode materials are called high-iron batteries. Potassium ferrate battery has a very high theoretical specific capacity (406 mAh / g), and it has strong oxidative properties, so it can usually be used for sewage treatment. The discharge product of potassium ferrate is Fe 2 o 3 ·nH 2 O, with flocculation, can also be used for sewage treatment. Therefore, the potassium ferrate battery is environmentally friendly and is a green battery. The material can be used as the positive electrode of the alkaline potassium ferrate battery, and can also be used as the positive electrode material of the lithium ion battery. [0003] Ferrate is used as the positive ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/525H01M4/62
CPCY02E60/10
Inventor 王素琴侯豪情王瑶瑶
Owner JIANGXI NORMAL UNIV