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Preparation method of high-specific-energy Zn/AgO small button type secondary battery

A secondary battery and energy technology, which is applied in the manufacture of secondary batteries, alkaline storage batteries, battery electrodes, etc., can solve the problems of low yield, complex process, and inability to meet the needs of ultra-low temperature environments.

Pending Publication Date: 2022-06-07
WUHAN MARINE ELECTRIC PROPULSION RES INST CHINA SHIPBUILDING IND CORP NO 712 INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the field of small Zn / AgO batteries, the working performance and service life of the battery are mainly related to the stability and resistivity of the positive electrode, the corrosion resistance of the negative electrode, the hydrogen evolution performance, the silver resistance of the diaphragm, the liquid retention capacity, and the ability to resist dendrites: 1) AgO is thermodynamically stable Poor performance and easy to decompose, the formation of Ag20 during charging and discharging causes the conductivity of the positive electrode to drop significantly; 2) The reaction between the alkaline electrolyte and the zinc negative electrode causes the negative electrode to be corroded and hydrogen evolution; Ion migration causes micro-short circuit of the battery, and the low liquid retention capacity of the diaphragm leads to a decrease in the cycle performance of the battery
[0003] At present, in the field of small batteries, the production process of lithium-ion batteries is complicated, the yield is low, and it cannot meet the needs of ultra-low temperature environments. The preparation process of small Zn / AgO batteries is simple, which can meet the use in a wide temperature range, and has a large market demand.

Method used

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  • Preparation method of high-specific-energy Zn/AgO small button type secondary battery
  • Preparation method of high-specific-energy Zn/AgO small button type secondary battery
  • Preparation method of high-specific-energy Zn/AgO small button type secondary battery

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Embodiment 1

[0031] refer to Figures 1 to 4 As shown, the preparation method of a high specific energy Zn / AgO small button-type secondary battery disclosed in the present invention comprises the following steps:

[0032] Cathode materials were synthesized by chemical methods.

[0033]Disperse spherical silver powder with a particle size of 1-15um is used as the precursor of the electrode material, and the silver powder accounts for 3-30% of the mass of the precursor solution, and the precursor is oxidized to Ag / AgO composite material by using an alkaline sodium persulfate solution as the oxidant , first prepare a highly dispersed aqueous solution with an elemental silver powder content of 5 to 30% in mass, and then prepare a sodium persulfate alkaline solution with a KOH concentration of 2 to 8 mol / L and a sodium persulfate concentration of 0.5 to 5 mol / L. After heating to 50~85℃, mix evenly, keep heating and stirring, the reaction time is 60~120min, finally add PbS alkali solution with ...

Embodiment 2

[0042] The difference from Example 1 is that in this example, the first preparation of KOH concentration is 2~8mol / L, and the sodium persulfate concentration is the oxidant solution of 0.5~5mol / L; 200mL elemental silver powder dispersion liquid and 300mL persulfuric acid The sodium lye solution is heated to 50~85℃, poured into a 1L beaker and kept stirring at a speed of 150~450rad / min, and the mixed solution is heated at the same time to keep the solution temperature in the range of 55~85℃, stirring and heating time For 60-120 min, the mixed solution was cooled, filtered, washed and dried to obtain the Ag / AgO composite material with spherical structure.

[0043] Take 5~20Ag / AgO composite material and add it to 100mL of lead sulfide alkali solution with a mass ratio of 3~10%, react at 65~75℃ for 15~45min, and after the mixed solution is cooled, filter, wash and dry to obtain spherical structure. Ag / AgO / AgPbO composite cathode material.

[0044] Weigh 0.15~0.5g Ag / AgO / AgPbO com...

Embodiment 3

[0046] The difference from Example 1 is that in this example, 400-1200 g of KOH was first dissolved in 2 L of deionized water, 10-50 g of active zinc powder was heated while hot, and after standing for 24 hours, 4-10 mol / L lye was obtained by filtration. Take 1L of KOH lye and a 2L beaker, add potassium fluoride monohydrate, potassium perfluorobutanesulfonate, zinc trifluoromethanesulfonate, zinc laurate, and zinc oxide in turn, wherein the addition amounts are 0.5-1.50mol, 5 ~30mmol, 20 ~ 100mmol, 10 ~ 100mmol, 0.5 ~ 2.5mol, 150 ~ 300rad / min stirring for 30min, then seal the mouth of the beaker and place the beaker in a 60 ℃ oven, heat for 6h, after the solution is cooled, filter, the filtrate is prepared Zn / AgO battery electrolyte.

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Abstract

The invention discloses a preparation method of a high-specific-energy Zn / AgO small button secondary battery, which comprises the following steps: synthesizing a positive electrode material by adopting a chemical method, preparing an alkaline electrolyte with low hydrogen evolution amount, finally using a mercury-free corrosion inhibitor zinc paste negative electrode, and assembling an AG3 type zinc-silver button battery by using the positive electrode, the zinc paste negative electrode, the alkaline electrolyte and a diaphragm, thereby obtaining the high-specific-energy Zn / AgO small button secondary battery. The Zn / AgO small button secondary battery prepared by the method provided by the invention has the advantages of high specific energy, long cycle life and simple preparation process.

Description

technical field [0001] The invention belongs to the technical field of water-based batteries, and in particular relates to a preparation method of a Zn / AgO small button-type secondary battery with high specific energy and wide temperature range. Background technique [0002] In the field of small Zn / AgO batteries, the working performance and service life of the battery are mainly related to the stability and resistivity of the positive electrode, the corrosion resistance and hydrogen evolution performance of the negative electrode, and the silver resistance, liquid retention, and dendrite resistance of the diaphragm: 1) The thermodynamic stability of AgO It is easy to decompose due to poor performance, and the formation of Ag20 during the charge and discharge process leads to a significant decrease in the conductivity of the positive electrode; 2) The reaction between the alkaline electrolyte and the zinc negative electrode causes the negative electrode to be corroded and hyd...

Claims

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Application Information

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IPC IPC(8): H01M10/28H01M4/36H01M4/38H01M4/42H01M4/48H01M10/26H01M10/32H01M50/403H01M50/411
CPCH01M10/285H01M10/32H01M4/366H01M4/38H01M4/48H01M4/42H01M10/26H01M50/403H01M50/411H01M2300/0091Y02P70/50
Inventor 张明王磊张祥功周思思陶园学
Owner WUHAN MARINE ELECTRIC PROPULSION RES INST CHINA SHIPBUILDING IND CORP NO 712 INST
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