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A kind of nickel-based battery pole piece, nickel-based battery and preparation method thereof
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A nickel-based battery technology, which is applied in the field of nickel-based battery preparation, can solve the problems that the discharge performance cannot meet the market requirements, and the nickel-metal hydride battery cannot perform ultra-high rate discharge, etc., to improve high-rate discharge performance and good air permeability , the effect of increasing market share
Active Publication Date: 2020-01-14
SHENZHEN EPT BATTERY
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Problems solved by technology
At present, there are more and more battery markets with special high-current discharge requirements, and the Ni-MH batteries prepared by the current technology cannot perform ultra-high rate discharge, and their discharge performance can no longer meet the requirements of the market.
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preparation example Construction
[0015] This specific embodiment provides a kind of preparation method of nickel-based battery, comprising the following steps:
[0016] S1, preparing the positive electrode sheet: making the positive electrode slurry with the positive electrode active material, the conductive agent, the additive and the binder, wherein the particle size distribution of the positive electrode active material is: the mass percentage of the -500 mesh particle size is ≥ 99%, The D50 particle size is 8.0±2.0 μm; the positive electrode slurry is uniformly coated on the surface of the positive electrode substrate with a thickness of 10-30 μm, and after drying, roll forming is performed to obtain a positive electrode with a thickness of 0.05-0.15 mm. piece.
[0017] Among them, the percentage of -500 mesh particle size means the mass ratio of particles in the sample that can pass through the 500 mesh sieve. The meanings of the following particle size percentages are similar to this meaning, and will ...
Embodiment
[0030] Preparation of positive electrode sheet:
[0031] 1) Slurry preparation: make cobalt-coated spherical nickel hydroxide, conductive agent, additives and binders (CMC, PTFE) into slurry;
[0032] Among them, the particle size distribution of cobalt-coated spherical nickel hydroxide is as follows:
[0034] 2) Coating: Nickel foil is used as the substrate (thickness: 10-30μm), and the cathode slurry is evenly printed and coated on the surface of the nickel foil;
[0035] 3) drying: drying the coated tape;
[0036] 4) Rolling: rolling forming, the forming thickness of the positive pole piece is between 0.05mm and 0.15mm.
[0037] 5) cutting;
[0038] 6) Post-processing.
[0039] Preparation of negative electrode sheet:
[0040] 1) Slurry preparation: make a slurry of hydrogen storage alloy powder, conductive agent, additive and binder (mixture of one or more of CMC, PAAS, ...
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Abstract
The invention discloses a method for preparing a nickel-based battery, which comprises the following steps: S1, preparing a positive electrode sheet: making a positive electrode slurry with a positive electrode active material with a certain particle size distribution, a conductive agent, an additive and a binder; making the positive electrode slurry The material is uniformly coated on the surface of the positive electrode substrate with a thickness of 10-30 μm, and after drying, roll forming is made to obtain a positive electrode sheet with a thickness of 0.05-0.15 mm; S2, to prepare the negative electrode sheet: the Negative electrode active material, conductive agent, additive and binder are used to make negative electrode slurry; the negative electrode slurry is evenly coated on the surface of the negative electrode substrate with a thickness of 5-20 μm, and after drying, it is roll-formed to obtain a thickness of 0.05-20 μm. Negative pole piece between 0.10mm; S3, the positive pole piece, the separator with a thickness of 0.04-0.08mm, and the negative pole piece are stacked and wound into a battery core. The nickel-based battery prepared by the invention has good ultra-high rate discharge performance and high discharge power.
Description
【Technical field】 [0001] The invention relates to a nickel-based battery, in particular to a method for preparing an ultra-high rate nickel-based battery. 【Background technique】 [0002] In recent years, with the improvement of people's awareness of environmental protection and the development of the green new energy industry, there are more and more electrical appliances such as hybrid vehicles, electric tools, electric bicycles, and starter power supplies, and the types of batteries used in conjunction with them are also increasing. rapidly increasing. At present, batteries have been widely used in various fields of people's work and life. With the rapid expansion of the battery market, people's requirements for its performance are also getting higher and higher. At present, there are more and more battery markets with special high-current discharge requirements, and the nickel-metal hydride batteries prepared by the current technology cannot perform ultra-high rate disch...
Claims
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