An oxygen ion conductive metal-metal oxide molten salt secondary battery and its preparation method

Abstract

The invention is a new battery with oxygen ion conduction, which uses the oxide of a relatively inactive metal (such as copper, etc.) as the positive electrode, the active metal (such as iron, zinc, etc.) . During the discharge process, the oxygen ions in the metal oxide of the positive electrode enter the electrolyte, the positive electrode is reduced to a simple metal, the oxygen ions are transported to the negative electrode through the electrolyte, and form oxides with the negative metal; the charging process is the opposite. Therefore, the charge and discharge of the battery depends on the migration of oxygen ions in the electrolyte between the positive and negative electrodes to achieve charge and discharge, and the difference in the binding energy between the positive and negative metals and oxygen stores electrical energy. The metal materials and electrolytes of the battery are rich in sources and cheap, the battery manufacturing process is simple, and the metal electrodes are convenient to recycle, which is suitable for large-scale energy storage.

Description

technical field [0001] The invention belongs to the technical field of new energy electrochemical energy storage batteries, in particular to a design and manufacture method of a novel oxygen ion conductive metal-metal oxide large-scale energy storage molten salt secondary battery. Background technique [0002] With the development of society, people's demand for energy is also increasing rapidly, while the reserves of traditional fossil energy are limited. In addition, the greenhouse effect and environmental pollution caused by burning fossil energy are becoming more and more serious. The energy and environmental crisis has become the 21st century. biggest challenge. At present, all countries are committed to supporting the development of new energy sources such as solar energy and wind energy. However, solar energy and wind energy have the disadvantages of uneven distribution of time and space, which has a great impact on the power grid. The phenomenon of abandoning wind an...

AI Technical Summary

Problems solved by technology

Large-scale energy storage requires low-cost batteries. The iron-air batteries currently under study are relatively low-cost, but the disadvantage is that iron-air batteries generally use alkaline aqueous solutions, and the hydrogen evolution potential of the water on the iron electrodes is low, which competes with iron reduction. Therefore, the charge-discharge Coulombic efficiency of iron-air batteries is very low, and the iron electrodes are prone to passivation at low temperatures.

In addition, because the air electrode requires a large surface area to absorb oxygen, it will cause some problems, such as the carbonation of the electrolyte caused by the adsorption of carbon dioxide, and because the air electrode involves the process of oxygen evolution and oxygen reduction reaction with very slow kinetics, resulting in the overpotential of the air battery. It is very large and requires expensive noble metals as catalysts. Even with catalysts, the overpotential of air batteries is still very large, and the energy efficiency of batteries is low

In addition, the recycling of traditional batteries is difficult, the battery structure is complex, the battery materials are complex, and the electrolyte is toxic and flammable. Therefore, the disposal of waste batteries has an impact on the environment, and the recycling cost is high.

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