Lithium molybdate positive electrode material of high-temperature lithium battery and preparation method and positive electrode material of high temperature lithium battery and preparation method thereof

Abstract

The invention provides a lithium molybdate positive electrode material of a high temperature lithium battery. A chemical structural formula is Li2MoO4. The invention also provides a preparation methodof a high temperature solid phase of the material, which comprises the following steps: weighing lithium salt and a molybdenum source according to a mol ratio, performing ball milling for 2-5 h and taking the material out, grinding the material and sieving the material, and sintering the material for 10-16 h under the air atmosphere at the temperature of 200-800 DEG C, and cooling the material toroom temperature. The invention also provides a preparation method of synthesis of its aqueous solution, and the difference is characterized in that the lithium salt and the molybdenum source are dumped in water for stirring and drying. In addition, the invention provides a preparation method of the positive electrode material of the high-temperature lithium battery, which comprises the followingsteps: grinding the above lithium molybdate positive electrode material of the high-temperature lithium battery and sieving the material; weighing the material, low melting point nitrate and an active carbon material, performing ball milling for 2-5 h, sintering the material under air atmosphere for 180 DEG C, taking the material out and grinding the material, and sieving the material. The lithium molybdate positive electrode material employs lithium molybdate, and has the advantages of high temperature resistance, good compatibility with nitric acid molten salt, high capacitance, and good discharge performance.

Description

technical field [0001] The invention relates to the technical field of high-temperature batteries, in particular to the field of positive electrode materials for high-temperature lithium batteries. Background technique [0002] Since the 21st century, with the rapid development of industry, fossil energy has been rapidly consumed, and non-renewable resources such as oil, natural gas, and coal are facing depletion. Although a lot of achievements have been made in the research and application of renewable resources in recent years, they still cannot meet our growing energy demand. Therefore, while developing renewable new energy, we also need to find new fossil energy to meet our current production and development needs. The search for new fossil energy requires the exploration of deeper formations, and high-temperature lithium batteries provide chemical energy for the exploration of fossil energy equipment. [0003] Lithium battery refers to a battery in which lithium is us...

AI Technical Summary

Problems solved by technology

The research on the application of transition metal oxide cathode materials in high-temperature lithium batteries was gradually carried out along with the development of low-melting point nitrates. At present, the hotter research on high-temperature lithium battery cathode materials is transition metal oxides and lithium intercalation compounds, but Transition metal oxides such as WO 3 The discharge capacity is not high, for example, the existing WO 3 The discharge performance of the cathode material is poor; FeS 2 and CoS 2 It reacts with eutectic salt of nitric acid, and is not suitable as anode material for high-temperature lithium batteries; AgNO 3 , Cd(NO 3 ) 2 , Pb(NO 3 ) 2 Nitrate positive electrode materials have good compatibility with nitric acid eutectic salts, high positive electrode sites and good rate performance, but this type of material is soluble in the electrolyte and will diffuse into the negative electrode material and react with the negative electrode, causing battery performance to decline

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