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Rechargeable battery and electrode compound for same

A recharging and composite technology, applied in battery electrodes, secondary batteries, lead-acid batteries, etc., can solve the problems of poor conductivity, low safety of liquid electrolyte, large interface resistance, etc., to reduce resistance and enhance deep discharge Circulation, the effect of reducing interface resistance

Inactive Publication Date: 2018-07-10
HKUST SHENZHEN RES INST +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The object of the present invention is to provide an electrode compound and a rechargeable battery for a rechargeable battery, which solves the problem of large internal interface resistance, poor conductivity and low safety of liquid electrolytes in battery systems with solid electrolytes in the prior art The problem

Method used

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  • Rechargeable battery and electrode compound for same
  • Rechargeable battery and electrode compound for same
  • Rechargeable battery and electrode compound for same

Examples

Experimental program
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Effect test

Embodiment 1

[0045] In a lead-acid battery system, the electrode compound is prepared by mixing 94.8 parts by mass of active material Pb, 5 parts by mass of polyaniline (PANI) gel and 0.2 part by mass of Gr. Using a planetary mixer, according to the above mass ratio, the active material Pb and Gr are mixed, and PANI and sulfuric acid are added, wherein the mass ratio of the added amount of sulfuric acid to PANI is 1. The resulting paste was printed on the existing current collector and then placed in an oven to cure the active material Pb and polyaniline (PANI) gel. The fabricated electrode structure is as figure 1 As shown, Gr and polyaniline (PANI) gel are uniformly distributed inside the electrode.

[0046] The second semi-solid electrolyte between the two electrodes is prepared from polyvinyl alcohol (PVA) gel and sulfuric acid, and the mass ratio of sulfuric acid to PVA is 1.

[0047] The lead-acid battery system assembled in Example 1 was tested by electrochemical full resistance s...

Embodiment 2

[0049]In a lead-acid battery system, the electrode compound is prepared by mixing 99.8 parts by mass of active material Pb, 0.1 part by mass of polyaniline (PANI) gel and 0.1 part by mass of carbon nanotubes. Using a planetary mixer, according to the above mass ratio, the active material Pb and Gr were mixed, and PANI and sulfuric acid were added, wherein the mass ratio of sulfuric acid to PANI was 0.25. The resulting paste was printed on the existing current collector and then placed in an oven to cure the active material Pb and polyaniline (PANI) gel. Gr and polyaniline (PANI) gel are evenly distributed inside the electrode.

[0050] The second semi-solid electrolyte between the two electrodes is prepared from PVA gel and sulfuric acid, and the mass ratio of sulfuric acid added to PVA is 0.25.

[0051] The lead-acid battery system assembled in this embodiment has been tested by electrochemical full resistance spectroscopy (EIS), and the test frequency is 10-10000 Hz. Imped...

Embodiment 3

[0053] In a lead-acid battery system, the electrode compound is prepared by mixing 70 parts by mass of active material Pb, 10 parts by mass of polyaniline (PANI) gel and 20 parts by mass of Gr oxide. Using a planetary mixer, according to the above mass ratio, the active material Pb and Gr oxide were mixed, and PANI and sulfuric acid were added, wherein the mass ratio of sulfuric acid to PANI was 20. The resulting paste was printed on the existing current collector and then placed in an oven to cure the active material Pb and polyaniline (PANI) gel. Gr oxide and polyaniline (PANI) gel are evenly distributed inside the electrode.

[0054] The second semi-solid electrolyte between the two electrodes is prepared from PVA gel and sulfuric acid, and the mass ratio of sulfuric acid to PVA is 20.

[0055] The lead-acid battery system assembled in this embodiment has been tested by electrochemical full resistance spectroscopy (EIS), and the test frequency is 10-10000 Hz. Impedance da...

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Abstract

The invention relates to a rechargeable battery and an electrode compound for the same. The electrode compound comprises active substance, carbon additive and first semisolid electrolyte. The carbon additive and the first semisolid electrolyte are added into the electrode compound, so that electron conductivity can be enhanced, and interface resistance can be lowered; the first semisolid electrolyte is filled in gaps among active substance particles in an electrode, so that better contact and ion migration between active substance particles / first semisolid electrolyte interfaces are realized;the carbon additive can be uniformly distributed in the electrode or glued / coated on the surface of the electrode to serve as an electron conductive network for electron conduction and enhancing electron conductivity of the electrode. The electrode compound presents improved battery performance, and deep discharge cycling is enhanced.

Description

technical field [0001] The invention relates to the technical field of batteries, and more specifically, relates to an electrode compound for a rechargeable battery and the rechargeable battery. Background technique [0002] There is growing demand for energy storage systems for future driverless vehicles that carry people, as well as for portable electronics, with most road transport still relying on traditional rechargeable batteries that use liquid electrolytes. Liquid electrolytes are often highly flammable, corrode and decompose at high temperatures. Therefore, people have been devoting themselves to constantly searching for safe alternatives. Solid-state battery systems have many advantages over rechargeable batteries, the fact that solid-state batteries are non-flammable, non-volatile, and inert in the event of an accident. Currently, solid-state electrolytes can be used as separators sandwiched between anodes and cathodes, or included in electrodes as thin hybrid e...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/583H01M4/62H01M4/60H01M10/0565H01M10/42H01M10/12
CPCH01M4/362H01M4/583H01M4/60H01M4/625H01M10/0565H01M10/12H01M10/4235Y02E60/10Y02P70/50
Inventor 王家奇李杰区初斌黄伟郭正光林铨振袁铭辉
Owner HKUST SHENZHEN RES INST
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