Bipolar battery and preparation method and application thereof
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A bipolar battery and bipolar technology, applied in the field of materials, can solve the problems of low safety, resource shortage, high cost of lithium-ion batteries, etc., and achieve the effects of high power density, uniform internal current, and excellent rate performance
Pending Publication Date: 2022-07-29
INST OF PHYSICS - CHINESE ACAD OF SCI
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Description
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Problems solved by technology
However, lithium-ion batteries have inherent disadvantages such as high cost, low safety and resource shortage.
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Examples
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Embodiment 1
[0056] This example provides a preparation process for a 6V 500mAh bipolar sodium-ion battery.
[0057] In step 1, the positive electrode, the negative electrode and the bipolar pole piece are respectively prepared by mixing and coating, and the positive electrode piece, the negative electrode piece and the bipolar pole piece are prepared after roll die cutting;
[0058] Step 2, connect a bipolar pole piece in series between the positive and negative poles, lamination to make a bipolar unit, connect 10 such bipolar units in parallel, and prepare a semi-finished bipolar 6V500mAh by thermal compounding and automatic welding. sodium-ion battery;
[0059] Step 3, placing the semi-finished battery in a vacuum oven at 85°C for 36 hours;
[0060] Step 4, prepare the gel electrolyte, mix the sodium ion electrolyte with MMA and PT, after the dispersion is uniform, add the initiator AIBN and quickly inject it into the electrode group, leave the gel at 60°C for 4 hours, take it out and ...
Embodiment 2
[0063] This example provides a preparation process for a 9V 100mAh bipolar sodium-ion battery.
[0064] In step 1, the positive electrode, the negative electrode and the bipolar pole piece are respectively prepared by mixing and coating, and the positive electrode piece, the negative electrode piece and the bipolar pole piece are prepared after roll die cutting;
[0065] Step 2, connect two bipolar pole pieces in series between the positive and negative poles, lamination to make a bipolar unit, connect 2 such bipolar units in parallel, and prepare a 9V100mAh semi-finished product through thermal compounding and automatic welding. polar sodium-ion batteries;
[0066] Step 3, placing the semi-finished battery in a vacuum oven at 85°C for 36 hours;
[0067] Step 4, prepare the gel electrolyte, mix the sodium ion electrolyte with MMA and PT, after the dispersion is uniform, add the initiator AIBN and quickly inject it into the electrode group, leave the gel at 60°C for 4 hours, t...
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Abstract
The invention relates to a bipolar battery and a preparation method and application thereof. The bipolar battery comprises at least one group of positive and negative plates, at least one bipolar plate, a diaphragm, electrolyte and a battery shell, each group of positive and negative plates comprises a positive plate and a negative plate; each bipolar plate comprises a positive electrode section and a negative electrode section, and the positive electrode section and the negative electrode section are isolated by an empty foil; the positive plate, the one or more bipolar plates and the negative plate are sequentially connected in series, and the diaphragm is arranged between the positive plate and the negative section and / or between the negative plate and the positive section and / or between the positive section and the negative section which are oppositely arranged to form a bipolar unit; in the charging process, in each bipolar unit, the direction of current is from the positive plate to the negative plate through the bipolar plate, and in the discharging process, the directions of the current are opposite.
Description
technical field [0001] The invention relates to the technical field of materials, in particular to a bipolar battery and a preparation method and application thereof. Background technique [0002] After years of development, the battery industry has experienced lead-acid batteries, nickel-cadmium batteries, nickel-metalhydride batteries, lithium-ion batteries and fuel cells. Among them, lead-acid batteries and nickel-cadmium batteries have been criticized for heavy metalpollution and will eventually be eliminated by history. NiMH batteries have a memory effect and must be fully charged and fully discharged to maintain cycle life. The cumbersome battery management system increases the difficulty of use and is gradually replaced by other batteries. Currently widely used lithium-ion batteries have the advantages of long life, no memory effect, low pollution, and high energy density. They are gradually replacing other types of batteries and are used in electric vehicles, elec...
Claims
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