Preparation method for zinc-nickel secondary battery with high-power density

A high power density, secondary battery technology, applied in secondary batteries, secondary battery repair/maintenance, nickel storage batteries, etc., can solve the problem of battery reversible capacity reduction, cycle life reduction, low mass specific energy, environmental hazards, etc. problems, to achieve the effect of inhibiting the formation of zinc dendrites, large specific surface area, and reducing electrode passivation

Inactive Publication Date: 2017-08-18
DONGGUAN LIANZHOU INTPROP OPERATION MANAGEMENT CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The first-generation power battery lead-acid battery is widely used in electric bicycles and electric motorcycles, but its mass specific energy is low, and the main raw material lead is polluted. The harm to the environment caused by the production process cannot be ignored.
The second-generation power battery Cd-Ni battery has been banned by EU countries for power battery due to cadmium pollution. The price of MH-Ni battery is much higher than that of lead-acid battery, because of the price problem, its competitiveness is less
The inorganic solid electrolyte in the separator of the secondary battery is a typical dense and hard inorganic solid, which can physically prevent the penetration of the separator caused by the zinc dendrites generated during charging, thereby preventing the positive and negative electrodes. Short circuit, but it is still unavoidable due to the accumulation of anode products on the zinc electrode, the problem of reduced reversible capacity and reduced cycle life of the battery

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] A method for preparing a zinc-nickel secondary battery with high power density, comprising the following steps:

[0037] (1) Preparation of positive electrode sheet:

[0038] Stir and mix nickel hydroxide, conductive graphite, hydroxyethyl cellulose, and water evenly to make a slurry, and then coat it on the foamed nickel current collector, dry, roll the film, and slice to obtain the positive electrode sheet, wherein nickel hydroxide, Conductive agent, binder, water weight ratio: 50:2:1:10;

[0039] (2) Preparation of negative electrode sheet:

[0040]First prepare Zn-based ZIF, then pre-carbonize the Zn-based ZIF prepared above under nitrogen protection at 250 °C for 1 h, and finally carbonize Zn-based ZIF at 450 °C under nitrogen protection for 1 h, and cool to obtain Zn / C composite material; the prepared Zn / C composite material, conductive graphite, hydroxyethyl cellulose, and water are added to a ball mill and mixed to prepare a slurry, and the slurry is coated o...

Embodiment 2

[0045] A method for preparing a zinc-nickel secondary battery with high power density, comprising the following steps:

[0046] (1) Preparation of positive electrode sheet:

[0047] Stir and mix nickel hydroxide, conductive graphite, polyvinyl alcohol, and water evenly to make a slurry, and then coat it on the foamed nickel current collector, dry, roll the film, and slice to obtain the positive electrode sheet, wherein nickel hydroxide, conductive agent , Binder, the weight ratio of water is: 50:7:3:15;

[0048] (2) Preparation of negative electrode sheet:

[0049] First prepare the Zn-based ZIF, then pre-carbonize the Zn-based ZIF prepared above under the protection of nitrogen at 350°C for 6 hours, and finally carbonize the Zn-based ZIF under the protection of nitrogen at 850°C for 10 hours, and cool to obtain Zn / C composite material; the prepared Zn / C composite material, conductive graphite, polyvinyl alcohol, and water are added to a ball mill and mixed by ball milling ...

Embodiment 3

[0054] A method for preparing a zinc-nickel secondary battery with high power density, comprising the following steps:

[0055] (1) Preparation of positive electrode sheet:

[0056] Stir and mix nickel hydroxide, conductive graphite, polytetrafluoroethylene, and water evenly to make a slurry, then coat it on the foamed nickel current collector, dry, roll the film, and slice it to obtain the positive electrode sheet, wherein nickel hydroxide, conductive The weight ratio of agent, binder and water is: 55:3:1:11;

[0057] (2) Preparation of negative electrode sheet:

[0058] First prepare the Zn-based ZIF, then pre-carbonize the Zn-based ZIF prepared above under the protection of nitrogen at 250°C for 2 hours, and finally carbonize the Zn-based ZIF under the protection of nitrogen at 500°C for 3 hours and cool to obtain Zn / C composite material; the prepared Zn / C composite material, conductive graphite, polytetrafluoroethylene, and water are added to a ball mill and mixed by ba...

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PUM

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Abstract

The invention discloses a preparation method for a zinc-nickel secondary battery with high-power density. The preparation method comprises the following steps of uniformly stirring and mixing nickel hydroxide, a conductive agent, a binding agent and water to prepare paste, coating the paste on a formed nickel current collector, and performing drying, roll forming and cutting to obtain a positive pole plate; preparing a negative pole plate, in which a zinc/carbon composite material is used as a negative active substance, the prepared Zn/C composite material, the conductive agent, the binding agent and the water added into a ball milling machine for ball-milling and mixing to prepare paste, the paste is coated on a negative current collector, and a negative pole plate is obtained by drying, roll forming and cutting; and performing assembly, in which the positive pole plate and the negative pole plate are separated by a separator, the positive pole plate and the negative pole plate are wound in a cylindrical shape to be sleeved into a battery shell, an electrolyte is injected, the positive pole plate is connected with a positive tap by a tab, the negative pole plate is in contact with the battery shell, and the zinc-nickel secondary battery is obtained by sealing and formation. The preparation method is simple, and the prepared zinc-nickel secondary battery is high in energy density, high in power density, long in service lifetime and large in capacity.

Description

[0001] Technical field: [0002] The invention relates to the field of battery preparation, in particular to a method for preparing a zinc-nickel secondary battery with high power density. [0003] Background technique: [0004] Since the 21st century, human beings' dependence on oil resources has led to over-exploitation of oil resources, resulting in environmental pollution and energy crises, and has caused a series of problems for human beings. Especially the smog weather caused by our country in recent years has warned human beings that it is urgent to solve environmental pollution. Replacing traditional petroleum fuels with cleaner new energy sources is a necessary condition for the sustainable development of the global economy. As we all know, electric energy is clean and non-polluting energy, which is more environmentally friendly than traditional petroleum fuels. A chemical power source is a device that can directly convert chemical energy into electrical energy. It c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/24H01M10/30H01M4/32H01M4/36H01M4/583H01M4/62H01M10/0567H01M10/42
CPCH01M4/32H01M4/362H01M4/583H01M4/625H01M10/0567H01M10/24H01M10/30H01M10/4235Y02E60/10
Inventor 李风浪
Owner DONGGUAN LIANZHOU INTPROP OPERATION MANAGEMENT CO LTD
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