Semi-fuel battery for providing power in water

Abstract

The invention relates to an aluminum / hydrogen peroxide monomer battery which comprises an anode part provided with an anode flow channel and a cathode part provided with a cathode flow channel, wherein the anode part is fixedly connected with the cathode part in a sealed mode; the anode flow channel is formed by gaps among granular separators adhered to an anode surface; and the cathode flow channel is a through groove pressed on a cathode base plate. The aluminum / hydrogen peroxide monomer battery adopts the granular separators, so an ion exchange membrane is supported, the weight is lightened, the anode flow channel is formed, the effective reaction area of the anode is improved, the pressure loss of an electrolyte is reduced when the electrolyte passes through the anode, hydrogen gas and a reaction product AlO2<-> can be discharged easily, and the specific energy and energy density of the battery are improved; the cathode flow channel is pressed on the cathode base plate to form a two-in-one structure of a catalyst layer and a flow field plate, so the thickness and weight of the battery are reduced; an oxidant can directly flow inside the three-dimensional catalyst layer, and the hydrogen peroxide transfers masses smoothly to improve the specific energy of the battery; and the ion exchange membrane plays a role in transforming double-chamber and single-chamber structures of the battery, and is suitable for an energy-type power battery pack of low-speed water equipment.

Description

technical field [0001] The invention relates to the technical field of batteries for underwater power, in particular to a semi-fuel cell for underwater power. Background technique [0002] Aluminum / hydrogen peroxide battery is an energy-type chemical power source developed in recent years. This battery has the characteristics of high specific energy and is suitable for underwater work. The metal / hydrogen peroxide fuel cells with Mg and Al as anodes, Al-H 2 o 2 The battery has been applied to underwater equipment, and the specific energy can reach 200Wh / kg-240Wh / kg. [0003] Aluminum / hydrogen peroxide batteries can be divided into single-chamber and double-chamber structures: the single-chamber battery has simple structure, low cost and high reliability, but due to Direct reaction, low utilization rate of active materials, which reduces the specific energy of the battery, so most of the current dual-chamber aluminum / hydrogen peroxide batteries are used; the dual-chamber st...

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Problems solved by technology

[0003] Aluminum / hydrogen peroxide batteries can be divided into single-chamber and double-chamber structures: the single-chamber battery has simple structure, low cost and high reliability, but due to Direct reaction, low utilization rate of active materials, which reduces the specific energy of the battery, so most of the current dual-chamber aluminum / hydrogen peroxide batteries are used; the dual-chamber structure of the battery separates the cathode area and the anode area through an ion exchange membrane to form a cathode chamber And the anode chamber can prevent the direct reaction between the aluminum electrode and the hydrogen peroxide electrode and improve the utilization rate of the active material. Since the battery needs to circulate the electrolyte to replenish the hydrogen peroxide consumed by the reaction and take away the reaction product and exhaust gas , so the cathode chamber and the anode chamber of the battery are equipped with flow channels

[0004] The flow channels of the currently known aluminum / hydrogen peroxide battery cathode chamber and anode chamber generally adopt a bipolar flow field plate structure. For example, in the patent CN201214482, an aluminum / hydrogen peroxide half fuel cell is designed, which is stored outside the battery The electrolyte and hydrogen peroxide solution enter the internal flow channel of the battery. The flow channel adopts a labyrinth structure or a turning structure of a bipolar flow field plate, that is, several sheet-like partitions are added in the flow channel to form a tortuous channel to allow the solution to flow. However, the thickness and weight of the battery with this structure are relatively large, and the effective reaction area of ​​the electrode is relatively low.

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