A kind of preparation method of iron-nickel battery negative electrode material

An iron-nickel battery and negative electrode material technology, applied in nickel batteries, battery electrodes, alkaline battery electrodes, etc., can solve the problems of self-discharge, poor negative rate performance, low gram capacity, etc., and achieve lower electrode impedance and high gram capacity. , the effect of increasing the surface area

Active Publication Date: 2021-02-05
YANGZHOU UNIV
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  • Abstract
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Problems solved by technology

At present, iron-nickel batteries on the market generally have problems such as low gram capacity, poor negative electrode rate performance, and self-discharge.

Method used

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  • A kind of preparation method of iron-nickel battery negative electrode material
  • A kind of preparation method of iron-nickel battery negative electrode material
  • A kind of preparation method of iron-nickel battery negative electrode material

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Experimental program
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Effect test

Embodiment

[0025] Add 0.5 g of carbon nanotubes, 1.0 g of graphene, 3.6 g of calcium hydroxide, and 93 g of nano-ferric oxide powder into 100.0 g of water, stir to form a uniform suspension, and then pass in carbon dioxide to carry out the reaction at 60°C. Gas-solid reaction, until the pH value of the suspension drops to 7, stop the ventilation, filter with suction, and wash to obtain 135 g of composite nanomaterial filter cake of calcium carbonate-loaded carbon nanotubes, graphene and ferroferric oxide.

[0026] Dissolve 0.3 g of hydroxyethyl cellulose in 15 g of water to make a 2 wt% aqueous solution of hydroxyethyl cellulose.

[0027] The above hydroxyethyl cellulose aqueous solution was added to 135 g of composite material filter cake, and then 13 g of water was added to obtain a slurry with a certain viscosity, and its solid content was determined to be 60 wt %.

[0028] Apply the above slurry evenly on the copper grid, and then put it in a vacuum drying oven. The temperature condi...

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Abstract

A method for preparing an iron-nickel battery negative electrode material, belonging to the technical field of battery negative electrode material production, performing a gas-solid reaction with a suspension obtained by mixing carbon nanotubes, graphene, nanometer iron tetroxide, calcium hydroxide and water , when the pH value of the suspension drops to 7, the filter cake is obtained by filtration, and then the filter cake is mixed with an aqueous solution of hydroxyethyl cellulose to obtain a composite nanomaterial slurry, which is coated on a copper grid and dried in vacuum and then rolled and slicing to prepare the negative plate of the iron-nickel battery. In the present invention, through the gas-solid reaction of carbon dioxide and calcium hydroxide, the submicron calcium carbonate supports graphene, carbon nanotubes, and ferric oxide nanocomposites, thereby preparing a high gram capacity, low resistance and good cycle stability. Iron-nickel battery anode material.

Description

technical field [0001] The invention belongs to the technical field of battery negative electrode material production, and in particular relates to the preparation technology of iron-nickel battery negative electrode material. Background technique [0002] The iron-nickel battery was researched and developed almost simultaneously by Edison of the United States and Junger of Sweden in 1901. It is one of many rechargeable batteries, and its development process has gone through twists and turns. At the beginning of the 20th century, it was widely used in the field of locomotive traction. But after 1960, people's interest in its research began to weaken, until after 1975, with the upsurge of electric vehicle research, it once again attracted the attention of countries all over the world. In 2012, a research report on iron-nickel batteries by scientists from Stanford University once again focused people's attention on iron-nickel batteries. It is believed that this will inevitab...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/26H01M4/52H01M4/62H01M10/30B82Y30/00
CPCB82Y30/00H01M4/26H01M4/521H01M4/625H01M4/628H01M10/30H01M2004/021H01M2004/027Y02E60/10
Inventor 朱爱萍顾思凌姜云龙芮敏
Owner YANGZHOU UNIV
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