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Cathode and electrolyte of aqueous solution lithium ion secondary battery, and battery

A secondary battery, aqueous solution technology, applied in secondary batteries, battery electrodes, solutions of liquid solvents at room temperature, etc., can solve the problems of concentration polarization, difficult to make practical batteries, and electrolyte cross-contamination.

Active Publication Date: 2016-12-07
胡晓光
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this electrochemical power system is essentially a liquid flow battery. ①The discharge active material of the zinc electrode is dissolved in the electrolyte, so that the electrode process is controlled by the liquid phase diffusion step, resulting in concentration polarization, which will inevitably be charged at the negative electrode Dendritic dendrites are produced when ② more than two electrolyte solutions are used, resulting in cross-contamination caused by irreversible diffusion between electrolytes
Obviously, this kind of liquid flow type zinc anode is difficult to make a practical battery

Method used

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  • Cathode and electrolyte of aqueous solution lithium ion secondary battery, and battery
  • Cathode and electrolyte of aqueous solution lithium ion secondary battery, and battery
  • Cathode and electrolyte of aqueous solution lithium ion secondary battery, and battery

Examples

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Embodiment 1

[0045] This embodiment describes an aqueous lithium ion secondary battery using zinc tartrate crystal hydrate as the negative electrode active material, lithium manganate as the positive electrode active material, and an aqueous solution of lithium tartrate as the electrolyte.

[0046] Preparation of the negative electrode: Weigh 2 grams of zinc tartrate crystalline hydrate, 0.15 grams of carbon nanotubes, and 0.1 grams of acetylene black, and put them in an agate mortar, mix them, and grind them. Weigh 0.15 grams each of the adhesive PVDF and LA132, dissolve it in the NMP solvent, heat and stir evenly, pour the mixed and finely ground mixture into the above solvent and stir to make a negative electrode slurry. The anode current collector is made of 0.1mm zinc foil, washed with acetone and deionized water alternately when using, and then the anode slurry is evenly coated on the zinc foil with a glass rod, dried at 80℃, rolled and dried at 120℃ As a negative electrode, the load is...

Embodiment 2

[0053] This embodiment describes an aqueous lithium ion secondary battery using zinc tartrate as the negative electrode active material, lithium cobaltate as the positive electrode active material, and lithium tartrate aqueous solution as the electrolyte.

[0054] Preparation of the negative electrode: Weigh 2 grams of zinc tartrate, 0.15 grams of activated carbon, and 0.1 grams of acetylene black, and put them in an agate mortar, mix and grind them. Weigh 0.15 grams each of the adhesive PVDF and LA132, dissolve it in the NMP solvent, heat and stir evenly, pour the mixed and finely ground mixture into the above solvent and stir to make a negative electrode slurry. The negative electrode current collector is 0.2 mm thick foamed silver, which is washed alternately with acetone and deionized water during use, and then the negative electrode slurry is evenly coated on the foamed silver with a glass rod, dried at 80°C, rolled, and dried at 120°C Manufactured into a negative electrode ...

Embodiment 3

[0061] This embodiment describes an aqueous lithium ion secondary battery using zinc tartrate as the negative electrode active material, lithium iron phosphate as the positive electrode active material, and lithium tartrate aqueous solution as the electrolyte.

[0062] Preparation of the negative electrode: Weigh 2 grams of zinc tartrate, 0.15 grams of activated carbon, and 0.1 grams of acetylene black, and put them in an agate mortar, mix and grind them. Weigh 0.15 grams each of the adhesive PVDF and LA132, dissolve it in the NMP solvent and heat and stir evenly, pour the mixed and ground mixture into the above solvent and stir to make a negative electrode slurry. The anode current collector is made of zinc foil with a thickness of 0.1 mm. It is washed alternately with acetone and deionized water during use, and then the anode slurry is evenly coated on the zinc foil with a glass rod, dried at 80°C, rolled and dried at 120°C Cut into 1cm×2cm negative electrode sheet, load capaci...

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Abstract

The invention provides a cathode and electrolyte of an aqueous solution lithium ion secondary battery, and the battery. Active substances of the cathode are zinc tartrate and / or one or more of crystalline hydrates of the zinc tartrate. The electrolyte of the battery is lithium tartrate aqueous solution or mixed aqueous solution of lithium tartrate and lithium hydroxide. A battery system integrates the advantages of high specific energy, environmental protection and low price of the conventional zinc electrode, and stable structure and good cycling performance of a lithium intercalation material for an anode of the lithium ion battery, and the defects of low energy density, poor cycling performance and the like of a lithium intercalation anode material of a rocking chair type lithium ion secondary battery in an aqueous application, and a problem of short service life caused by thermodynamics instability, easiness in solubility and dendritic crystal of a zinc electrode in alkaline electrolyte are avoided. A precipitation-intercalation and de-intercalation reaction mixing mechanism of double ion is cleverly utilized to achieve a breakthrough of application of the aqueous lithium ion battery.

Description

Technical field [0001] The invention belongs to the field of chemical power sources, and particularly relates to a coordination polymer negative electrode material, an electrolyte, and an aqueous lithium ion secondary battery containing the negative electrode material and the electrolyte. Background technique [0002] Lithium-ion non-aqueous secondary batteries are widely used in mobile communications, digital cameras, notebook computers and other fields due to their high specific energy and long cycle life. However, the electrolyte used in commercial lithium-ion batteries is an organic electrolyte, and its flammable and explosive characteristics lead to serious safety hazards in improper operation. In addition, the ionic conductivity of the non-aqueous electrolyte is 2 orders of magnitude lower than that of the corresponding water system, which affects the performance of lithium intercalation materials and battery performance; the organic electrolyte components have certain toxi...

Claims

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Application Information

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IPC IPC(8): H01M10/0525H01M4/36C30B29/56C30B7/14C07C59/255C07C51/41
CPCC07C51/41C07C59/255C30B7/14C30B29/56H01M4/36H01M10/0525Y02E60/10
Inventor 胡晓光
Owner 胡晓光
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