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Proton conductive polymer secondary battery

A secondary battery, proton conduction technology, applied in the direction of secondary batteries, secondary battery manufacturing, battery electrodes, etc., can solve the problems of insufficient low temperature characteristics, insufficient cycle characteristics, and inability to fully obtain the initial doping rate, etc. Achieve the effects of improving activity, suppressing structural deterioration, and suppressing changes in electrode volume

Inactive Publication Date: 2006-06-14
TOKIN CORP
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  • Description
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Problems solved by technology

However, as mentioned above, since simply increasing the concentration of sulfuric acid in the electrolyte reduces the cycle characteristics, the concentration of sulfuric acid in the proton-conducting polymer battery is controlled at about 20%
[0011] Because the electrochemical doping accompanying charging and discharging changes the concentration of the electrolyte, the initial doping rate into the electrode at this sulfuric acid concentration (doping concentration) cannot be sufficiently obtained, and the battery capacity is also not satisfactory
In addition, its cycle characteristics are not sufficient, and its low-temperature characteristics are not sufficient

Method used

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Embodiment Construction

[0022] There is a lead battery in which an aqueous sulfuric acid solution is used as an electrolytic solution, which is similar to the secondary battery of the present invention. For example, Japanese Patent Application No. 162147 / 96 discloses the addition of bisulfate as an additive to the electrolytic solution. It is described that the addition of bisulfate serves to increase capacity and prolong life, which is similar to the present invention.

[0023] In a lead battery, a charge / discharge reaction occurs according to reaction equation (3) described below, and electrolysis of water also occurs as a side reaction (reaction equations (4) and (5)) resulting in a decrease in water content. If the battery is in an over-discharge state, through self-discharge, the concentration of sulfuric acid decreases, which leads to a decrease in the solution density and increases the PbSO 4 Solubility, leading to the dissolution of a large amount of Pb 2+ , these Pb 2+ with OH - and O 2...

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Abstract

A proton-conducting polymer secondary battery characterized in that a positive electrode and a negative electrode are arranged opposite to each other through a separator in an electrolytic solution, and only protons in π-conjugated polymers or quinones contained in quinones formed by combining oxygen The protons in the polymer of the hydroxyl group participate in charging / discharging as the electrode active material in the positive and negative electrodes. The proton concentration in the electrolyte is 5-40%, the anion concentration is 30-60%, and the anion concentration is at least higher than the proton concentration.

Description

technical field [0001] The present invention relates to a proton conductive polymer secondary battery, especially a secondary battery with improved capacity characteristics and cycle characteristics. Background technique [0002] In the structural composition of the proton-conducting polymer secondary battery, the positive electrode is formed on the positive electrode collector, and the negative electrode is formed on the negative electrode collector. These electrodes are stacked through the separator, and water or non-aqueous solution containing the proton source is used as the electrolyte on the separator injection. [0003] A method of forming an electrode includes: preparing a slurry by adding a binder to doped or undoped base polymer powder and a conductive adjuvant such as a conductive rubber sheet on a current collector, injecting the slurry into the Electrodes having a desired electrode density and film thickness are formed by hot pressing in a desired mold. [000...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/04H01M10/36H01M4/60
CPCH01M4/137H01M4/60H01M4/608H01M4/62H01M4/622H01M10/36H01M2300/0005H01M2300/0011Y02E60/10Y02P70/50H01M10/0585H01M10/0567H01M4/58H01M10/0525
Inventor 信田知希西山利彦纸透浩幸原田学黑崎雅人中川裕二吉田真也三谷胜哉
Owner TOKIN CORP
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