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release time:2024-08-05 Hits: Popular:AG11 battery
Discussion on the use of aluminum-containing hydrogen peroxide in assisting 402030 polymer battery for zero-man underwater operations
Principles and characteristics of Al/H2O2 semi-fuel power 402030 polymer battery From the perspective of electrochemistry, metal aluminum has outstanding advantages as the anode of chemical 402030 polymer battery. It has a very low electrochemical equivalent (8.99g/mol), and its corresponding current density is 2.98Ah/g, second only to Li (3.86Ah/g) among the metal elements that can be used as anodes. The unit volume energy of Al can reach 8.04Ah/cm3, while Li has only 2.06Ah/cm3, which has the ability to become a high-energy battery material. In addition, Al is the third most abundant metal in nature, and its development and production process is relatively mature, with outstanding cost-effectiveness. Therefore, the development of Al 402030 polymer battery has always been valued by people, and various types of aluminum battery systems adapted to different usage conditions have been developed. Al/H2O2 402030 polymer battery are a semi-fuel chemical power source used in small underwater power systems.
The open circuit potential of the battery composed of this pair of electrodes reaches the range of 1.21.7V depending on the current density. In the presence of a catalyst, the specific energy can be close to 360Wh/L, exceeding the target of the Al/AgO battery with the same structure (290Wh/L). This type of battery fully utilizes the advantages of aluminum electrodes. The specific power of the battery is 50200W/kg and the specific energy is 440Wh/kg, which is 1015 times that of lead-acid 402030 polymer battery and 34 times that of Zn/AgO 402030 polymer battery. The battery can be prepared in a few minutes and can carry fuel for long-distance navigation. The efficiency of the negative electrode is stable by replacing the electrolyte and the electrode. The battery has stable performance during operation, the temperature can be controlled, the electrodes and related components are easy to replace, and the product pollution is small. Similar Al/O2 (also known as aluminum/air battery) has been put into practical use in electric vehicles, and the technology is relatively mature. The application of this type of battery in underwater environments as a power source for unmanned underwater vehicles has a theoretical and practical basis and a high degree of feasibility.
At present, foreign countries have gone through the basic research stage, including the research on electrode material performance, single battery performance, partial battery combination performance, small prototype development and performance testing, and have begun to carry out the configuration coordination control and engineering of the whole system. At the same time, they have carried out in-depth discussions on the mechanism of electrochemical use, studied the control and optimization of the electrolyte system, and studied the product finalization and expanded application. my country's work in this regard is in its infancy. Drawing on relevant foreign technologies and working around Al 402030 polymer battery, a lot of basic research work needs to be done. Combining the current research status at home and abroad, the author believes that the following aspects should be focused on.
Current research progress and technical focus Optimization of anode materials There are two defects in the use of aluminum anode as a battery material: first, there is a passivation film on the aluminum electrode surface, which is more easily polarized in a neutral aqueous solution medium, resulting in a decrease in effective current density. Secondly, the aluminum anode has a self-dissolution purpose in the electrolyte, which is conjugated with the hydrogen evolution process on its surface. These two factors significantly reduce the efficiency of the aluminum anode, so the performance optimization of aluminum battery materials is an important research content.
Research on cathode performance H2O2, as a cathode oxidant, was developed on the basis of oxygen electrode. The main purpose is to improve the carrying capacity of battery cathode fuel, because gaseous oxygen and liquid oxygen are difficult to store and carry. High-concentration H2O2 can decompose rapidly on the electrode surface to release oxygen for reduction under certain catalyst uses. At the same time, it can also be directly reduced and supply cathode current together with the decomposed oxygen to meet the requirements. Since H2O2 was once used as a thermal fuel for rockets and spacecraft, its concentration, storage and catalytic technology already has a certain research foundation, and the research results in related fields can be used for reference. However, the research on the electrochemical process of H2O2 reduction on the gas electrode surface involves very little, and there is no work that can be used for reference. In-depth theoretical research must be carried out.
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