Method for preparing aluminum/hydrogen peroxide monomer batteries

Abstract

The invention discloses a method for preparing aluminum / hydrogen peroxide monomer batteries, and the method is used for hermetically and fixedly assembling an anode part and a cathode part into an integral monomer battery, wherein the anode part and the cathode part are successively prepared; and the method is characterized in that granular spacers are fully adhered to one surface of the anode part at a certain interval, and the interval is used as an anode channel; and a through trough is pressed on one surface of a cathode substrate of the cathode part and used as a cathode channel. In the invention, an anode channel is formed by using granular spacers, thereby reducing the weight of the battery, reducing the pressure loss of an electrolyte flowing through the anode part, better facilitating the discharge of hydrogen and reaction products AlO2<->, and improving the specific energy and energy density of the battery; a cathode channel is pressed on the cathode part so as to form a catalyst layer-flow field plate two-in-one structure, thereby reducing the thickness and weight of the battery; an oxidizing agent can directly flow in the three-dimensional catalyst layer, and the mass transfer of hydrogen peroxides is smooth, thereby improving the specific energy of the battery; and an ion exchange membrane achieve an effect of transformation between a double chamber structure and a single chamber structure of the battery, and is suitable for energy type power battery packs of low speed underwater equipment.

Description

technical field [0001] The invention relates to the technical field of underwater power batteries, in particular to a preparation method of an aluminum / hydrogen peroxide single battery. 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 ar...

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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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