Preparation method of lithium-deintercalation-state lithium ion battery positive electrode material

Abstract

The invention discloses a preparation method of a lithium-deintercalation-state lithium ion battery positive electrode material. The preparation method comprises the steps of performing ball milling on a commercial lithium-intercalation-state positive electrode material and expansion graphite based on a certain proportion, and then performing vacuum drying on the mixture at a temperature of 120 DEG C, then taking out the dried product, and putting the product into a glove box with water oxygen content of less than 0.1ppm to be cooled; next, adding an electrolyte and performing stirring to prepare a paste material; uniformly coating a positive electrode plate with the paste material, and then adding a diaphragm and a lithium sheet in sequence, performing sealing and covering a negative electrode plate to assemble a battery; and after charging formation is completed, detaching the battery, taking out positive electrode powder, and performing soaking, stirring, suction filtration and drying to obtain the lithium-deintercalation-state lithium ion battery positive electrode material. By adoption of the method disclosed in the invention, the lithium ion battery positive electrode material is subjected to lithium-deintercalation treatment directly and then used for the lithium primary battery; and compared with the current lithium primary battery, the battery adopting the positive electrode material disclosed in the invention has higher specific energy and power characteristic, longer storage life, and higher safety performance, so that solid foundation is laid for the research and development of novel individual combat weaponry.

Description

technical field [0001] The technology of the invention belongs to the technical field of lithium-ion battery materials, and in particular relates to a preparation method of a lithium-ion battery cathode material in a delithiated state. Background technique [0002] In the early 1960s, lithium primary batteries began to be researched and developed. After 1970, Li-(CF) batteries appeared one after another. x , Li-MnO 2 , Li-SO 2 and Li-SOCl 2 Such commercial lithium primary batteries are currently only used in some military and civilian special fields because of their disadvantages such as low battery voltage, large environmental pollution, and potential safety hazards. [0003] Lithium-ion batteries have a wider range of applications, such as mobile phones, portable computers, power tools and electric vehicles, and have partially replaced traditional batteries. [0004] Therefore, it is necessary to develop a positive electrode material for delithiated lithium-ion batteri...

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Problems solved by technology

[0002] In the early 1960s, lithium primary batteries began to be researched and developed. After 1970, Li-(CF) batteries appeared one after another. x , Li-MnO 2 , Li-SO 2 and Li-SOCl 2 Lithium primary batteries are commercialized, and because of their disadvantages such as low battery voltage, large environmental pollution and potential safety hazards, they are currently only used in some military and civilian special fields

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