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A secondary iron-based composite material-copper ferricyanide battery and its manufacturing method

An iron-based composite material, copper ferricyanide technology, applied in secondary batteries, battery electrodes, circuits, etc., can solve the problems of expensive platinum, scarce resources, unsatisfactory performance and stability, etc., to achieve good stability, Avoidance of spontaneous discharge, effect of excellent redox properties

Active Publication Date: 2019-08-23
HUNAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high price and scarcity of platinum resources, the practical application of this battery is severely limited.
Although many non-platinum electrocatalysts for the oxygen reduction reaction have been developed, their performance and stability are not satisfactory.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) Preparation of iron-based composite materials

[0024] Add 4.4 g Ni(NO3)2 6H2O and 31 g FeSO4 7H2O solids into 100 mL of water-ethanol mixed solvent with a volume ratio of 1:1, stir well until completely dissolved; then add 20 mg trisulfide to the solution Dibismuth solid powder is stirred to fully disperse bismuth trisulfide in the solution; then, the formed mixture is transferred to a rotary evaporator and heated at 80 o The solvent was removed by heating on a C water bath, and the solid formed at 40 o C in an air drying oven for 10 hours; finally the dried solid was placed in a tube furnace and heated to 420 °C in a hydrogen stream. o C, and be incubated for 3 hours, then naturally cool to room temperature, and the gained solid is an iron-based composite material;

[0025] (2) Preparation of battery negative electrode sheet

[0026] Mix carbon powder, iron-based composite material and absolute ethanol at a ratio of 50 mg: 20 mg: 10 mL, stir well, continue to s...

Embodiment 2

[0036] (1) Preparation of iron-based composite materials

[0037] Same as step (1) of Example 1.

[0038] (2) Preparation of battery negative electrode sheet

[0039] Mix the carbon powder, iron-based composite material and absolute ethanol at a ratio of 50 mg: 35 mg: 10 mL, stir well, continue to stir fully in a 75°C water bath, and add 60% (mass percentage) of 40 μL of polytetrafluoroethylene emulsion was stirred into a uniformly mixed paste, and the paste was coated on both sides of the stainless steel, and then rolled into a sheet, placed at room temperature, and dried to obtain a negative electrode sheet for the battery .

[0040] (3) Preparation of battery positive electrode sheet

[0041] Same as step (3) of Example 1.

[0042] (4) Assembly and performance test of iron-based composite material-copper ferricyanide battery

[0043] The positive electrode sheet and the negative electrode sheet of the battery are separated by a double-layer polyethylene porous film, pl...

Embodiment 3

[0048] (1) Preparation of iron-based composite materials

[0049] Same as step (1) of Example 1.

[0050] (2) Preparation of battery negative electrode sheet

[0051] Mix carbon powder, iron-based composite material and absolute ethanol at a ratio of 50 mg: 50 mg: 10 mL, stir well, continue to stir fully in a 75°C water bath, and add 60% (mass percentage) of 80 μL of polytetrafluoroethylene emulsion, after stirring into a uniformly mixed gel, apply the gel on the front and back of stainless steel, then roll it into a sheet, place it at room temperature, and dry it to prepare the negative electrode sheet of the battery .

[0052] (3) Preparation of battery positive electrode sheet

[0053] Same as step (3) of Example 1.

[0054] (4) Assembly and performance test of iron-based composite material-copper ferricyanide battery

[0055] The positive electrode sheet and the negative electrode sheet of the battery are separated by a double-layer polyethylene porous film, placed in...

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Abstract

The invention discloses a manufacturing method of a secondary iron-based composite-copper ferricyanide battery, the manufacturing method comprises the steps of: (1) preparing an iron-based composite; (2) preparing a battery negative electrode sheet; (3) preparing a battery positive electrode sheet; (4) assembling a iron-based composite-copper ferricyanide battery. In the invention, the iron-based composite is used as a negative electrode, the copper ferricyanide is used as a positive electrode and an electrolyte is an acidic solution. The negative electrode of the new type battery is a composite with iron as the main component, and has relatively good stability in the acidic solution to avoid spontaneous discharge of the battery; the positive electrode of the battery is the copper ferricyanide, which is stable in the acidic solution and has excellent redox properties. When the battery is discharging, the negative electrode is a process of forming metal ions by the iron-based composite and the positive electrode is a process of forming copper ferrocyanide by the copper ferricyanide. When the battery is charging, the metal ions are deposited on the negative electrode and the copper ferrocyanide in the positive electrode is reduced to be the copper ferricyanide.

Description

technical field [0001] The invention belongs to the technical field of novel electrochemical energy, and specifically relates to a novel secondary iron-based composite material-copper ferricyanide battery and a manufacturing method thereof. Background technique [0002] Iron is a cheap and resource-rich metal. The batteries using it as the negative electrode are mainly iron-air batteries. This battery has many advantages such as low cost, environmental friendliness, and rechargeability. However, during the operation of the battery, the self-discharge of the battery is more obvious, because in the acidic solution, the spontaneous dissolution of iron tends to be relatively large; in addition, if the battery is operated in an alkaline solution, due to the passivation of the iron surface, the battery will be charged. The discharge performance drops rapidly. Therefore, the development of iron-based materials with stable properties and excellent charge-discharge performance in ac...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36H01M4/58H01M10/36
CPCH01M4/362H01M4/58H01M10/36Y02E60/10
Inventor 易清风张媛媛邓中梁
Owner HUNAN UNIV OF SCI & TECH
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