Lithium molybdate cathode material for the hottest

Lithium molybdate cathode material for high temperature lithium battery and its preparation method

the patented technology of the invention provides a lithium molybdate cathode material for high temperature lithium battery, whose chemical structure formula is li2moo4. And provide a high-temperature solid-state preparation method, including massaging the lithium salt and molybdenum source, taking it out, grinding and sieving after ball milling for 2-5h; Sinter at 200-800 ℃ for 10-16h in air atmosphere and reduce to room temperature. The difference is that lithium salt and molybdenum source are poured into water, stirred and dried. In addition, the patented technology of the invention provides a preparation method of the cathode material of the high-temperature lithium battery, including grinding and screening the lithium molybdate cathode material of the high-temperature lithium battery; Weigh the material, low melting point nitrate and activated carbon material, and ball mill for 2-5h; It was sintered at 180 ℃ in air atmosphere for 3h, removed, ground and sieved. The lithium molybdate cathode material of the high-temperature lithium battery provided by the patented technology of the invention adopts lithium molybdate, which is more resistant to high temperature and has good compatibility with nitric acid eutectic salt at high temperature, high capacitance and good discharge performance

[summary of technical implementation steps]

lithium molybdate cathode material and its preparation method of high temperature lithium battery, and cathode material and its preparation method of high temperature lithium battery

this patent technology relates to the field of high temperature battery, especially the cathode material of high temperature lithium battery

Introduction to technology

since the 21st century, with the rapid development of industry, fossil energy has been rapidly consumed, such as oil, natural gas, coal, and other non renewable resources that are integrated into the "interconnection +" model are facing depletion. Although people have made a lot of achievements in the research and application of renewable resources in recent years, they still can not 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 strata. High temperature lithium batteries provide chemical energy for the exploration of fossil energy equipment. Lithium battery refers to the battery that uses lithium as the main active material in the electrode material. Because lithium is the electrode material with the smallest atomic weight, the lowest density, the smallest electrochemical equivalent and the most negative electrode potential among all metal elements, lithium batteries using metal lithium or lithium alloy as negative electrode materials generally have the advantages of high open circuit voltage, high specific energy and long service life. At present, the working temperature of lithium batteries used in commercial fields is -55-70 ℃ (generally higher than 150 ℃, it will burn or explode). To check whether the movement speed of beams is normal, the working temperature of thermal batteries used in military fields is 350-550 ℃, while the research on high temperature batteries of lithium batteries with working temperature between 150-350 ℃ has not made significant achievements. We call batteries that work between 150-350 ℃ as high-temperature batteries (or low-temperature batteries in thermal batteries). The working principle of high-temperature battery is basically the same as that of thermal battery, but high-temperature battery does not need fuse power supply and can be activated by ambient temperature. High temperature lithium battery is mainly composed of cathode material, electrolyte and cathode material. High temperature is still the same after years of use. Nu Skin lithium batteries are all solid-state batteries. Unlike lithium-ion batteries, they are solid at room temperature. Only when the electrolyte melts at high temperature can they have conductivity. Therefore, there is no self discharge and they can be stored for 20 to 30 years

[technical protection point]

1 A lithium molybdate cathode material for high temperature lithium battery, which is characterized in that the chemical structure formula of the lithium molybdate cathode material is li2moo4, and the crystal structure is triclinic system

[summary of technical features]

1 A lithium molybdate cathode material for high temperature lithium battery, which is characterized in that the chemical structure formula of the lithium molybdate cathode material is li2moo4, and the crystal structure is triclinic system. 2. The lithium molybdate cathode material of the high temperature lithium battery according to claim 1, which is characterized in that the operating temperature range of the high temperature lithium battery is 150-350 ℃. 3. A high-temperature solid-state preparation method for lithium molybdate cathode material of high-temperature lithium battery according to any one of claims 1-2, which is characterized by: step S1: weigh lithium salt and molybdenum source according to the molar ratio li:mo=2:1, pour it into a ball mill tank and ball mill it for 2-5h to obtain evenly mixed raw materials; Step S2: take out the raw material obtained in step S1, grind it and sift it; Step S3: sinter the raw material obtained in step S2 at 200-800 ℃ for 10-16h in air atmosphere, and cool it to room temperature to obtain lithium molybdate cathode material. 4. The high-temperature solid-state preparation method of lithium molybdate cathode material for high-temperature lithium battery according to claim 3, wherein the sintering temperature in step S3 is 400-800 ℃. 5. The high-temperature solid-state preparation method of lithium molybdate cathode material for high-temperature lithium battery according to claim 3, which is characterized in that the lithium salt is one of lithium carbonate, lithium hydroxide, lithium acetate or lithium acetate, and the molybdenum source is one of molybdenum trioxide, molybdenum acetate and molybdenum carbonate. 6. An aqueous solution synthesis method for preparing lithium molybdate cathode material of high temperature lithium battery according to any one of claims 1-2, which is characterized by: step S1: weigh lithium salt and molybdenum source according to the molar ratio li:mo=2:1, pour into distilled water and stir for 2-5h to obtain a homogeneous aqueous solution

[patent technology attribute]

technology R & D personnel: Ren Xiaoying, Wu Zhu, Du Junlin, Pu Chaohui, Xu Xiaoou, Wang Runbo, Gu Jiachuan,

applicant (patent right): Shanghai Institute of microsystems and information technology, Chinese Academy of Sciences