Preparation method of sharpened monocrystal high-voltage spinel lithium nickel manganese oxide cathode material

A lithium nickel manganese oxide and cathode material technology, applied in the field of lithium-ion battery materials, can solve the problems of reduced electrochemical performance, many structural defects, and increased side reactions, so as to improve cycle performance, avoid raw material splashing, and reduce manganese dissolution. Effect
CN110438557AActive Publication Date: 2019-11-12HUNAN CHANGYUAN LICO CO LTD
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Patent Information

Authority / Receiving Office
CN Β· China
Current Assignee / Owner
HUNAN CHANGYUAN LICO CO LTD
Publication Date
2019-11-12

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Abstract

The invention discloses a preparation method of a sharpened monocrystal high-voltage spinel lithium nickel manganese oxide cathode material. The preparation method comprises the steps that (1) a lithium source, a nickel source, a manganese source, dopants, a fluxing agent and organic acid are mixed evenly; (2) a heating furnace is heated up to 80-300 DEG C and subjected to heat preservation, thena mixed material obtained in the step (1) is put into the heating furnace to be subjected to heat preservation for 0.5-30 h at the temperature, and a low-temperature eutectic mixture is formed; and (3) the low-temperature eutectic mixture obtained in the step (2) is placed into the heating furnace at the preset temperature of 300-700 DEG C to be heated and ignited, then sintered and naturally cooled with the furnace, and thus the sharpened monocrystal high-voltage spinel lithium nickel manganese oxide cathode material is obtained. The preparation method is simple in process, high in efficiencyand low in equipment requirement, the raw material mixing level of a liquid phase combustion method can be reached, raw material splashing in the liquid phase combustion method ignition process is further avoided, and large-scale production is easy to realize.
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Description

technical field

[0001] The invention belongs to the field of lithium ion battery materials, and in particular relates to a preparation method of a sharpened single crystal high-voltage spinel lithium nickel manganese oxide positive electrode material. Background technique

[0002] As an energy storage technology that can be repeatedly charged and discharged, lithium-ion batteries have achieved very important and successful applications in the past 20 years, especially as a power source for various mobile electronic devices, which has promoted the development of communication, electronics and other industries. Flourish. However, the energy density and power density of existing lithium-ion batteries are low, and their safety and cycle life have not yet met the requirements of future electric vehicles and energy storage system applications. The energy density and safety of lithium-ion batteries need to be continuously improved. Increasing the output voltage of a single cell is...

Claims

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