A kind of positive electrode material for metal-air battery and its positive electrode preparation method

A metal-air battery and cathode material technology, applied in the field of electrochemical energy, can solve the problems of long-term battery storage difficulties, complex manufacturing process, low current density, etc., achieve wide applicability, prolong battery life, and reduce battery overpotential effects
CN105846015BActive Publication Date: 2018-11-13徐嘉陵
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
徐嘉陵
Publication Date
2018-11-13

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Abstract

The invention discloses a positive electrode material for a metal-air battery and a preparation method for a positive electrode. The positive electrode material comprises the following constituents by weight: 2-6% of M<x>Fe<3-x>O<4>, 0.5-3% of carbon dioxide absorbent, 5-10% of active carbon, 0.5-4% of super-conductive acetylene black, 0.5-2% of expanded graphite, 10-70% of 95% ethyl alcohol and 7-80% of PTFE emulsion, wherein the x in the M<x>Fe<3-x>O<4> is less than 3, and M is one or Fe, Cu, Co and MN. By the positive electrode material, overpotential of the battery can be reduced, the service lifetime of the battery is prolonged, and electrolyte carbonation can be reduced. The positive electrode material disclosed by the invention is wide in applicability and is suitably used for coating, dip-coating and rolling methods. The battery prepared from the positive electrode material has high-power (more than 1W, a single battery) discharge performance and high battery capacity under 1A current discharge (more than 6,000mAh, a single battery).
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Description

【Technical field】

[0001] The invention relates to a positive electrode material for a metal-air battery and a preparation method thereof, belonging to the technical field of electrochemical energy. 【Background technique】

[0002] Metal-air batteries use metals (zinc, lithium, aluminum, magnesium, etc.) and oxygen as fuel to convert chemical energy into electrical energy, and have the advantages of non-toxic, non-polluting, stable discharge voltage, high specific energy, long storage life, and low price. , Compared with existing lead-acid, nickel-metal hydride and other batteries, metal-air batteries have higher energy density and specific energy. For this type of battery, the catalyst material and formula used in the positive electrode determine the performance of the entire battery and are also key elements in its mass production application.

[0003] The catalyst in the positive electrode in the metal-air battery plays the role of catalytic reduction of oxygen. The cataly...

Claims

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