Ternary lithium nickel cobalt manganese oxide material and preparation method and application thereof

Abstract

The invention discloses a ternary lithium nickel cobalt manganese oxide material and a preparation method, and the preparation method comprises the following steps: by taking cobalt-manganese oxide asa template, a cobalt source and a manganese source, nickel acetate hexahydrate and lithium carbonate as a nickel source and a lithium source, and deionized water as a solvent, synthesizing cobalt manganese oxalate by adopting a hydrothermal method, and calcining in air to obtain a cobalt-manganese oxide precursor; and finally, adding a nickel source and a lithium source, performing uniform mixingthrough ball milling, introducing oxygen, and performing sintering in a tubular furnace to obtain the ternary lithium nickel cobalt manganate material. The ternary lithium nickel cobalt manganese oxide material has a large specific surface area, is conducive to full contact and ion transmission between an electrolyte and an active substance, increases reaction active sites, overcomes the disadvantage of poor large current discharge capability of the ternary lithium nickel cobalt manganese oxide material, greatly improves electrochemical performances when used as a lithium ion battery positiveelectrode material, and improves the cycling stability and the rate capability.

Description

technical field [0001] The invention relates to the field of positive electrode materials for lithium ion batteries, in particular to a ternary nickel-cobalt lithium manganese oxide material, a preparation method and an application. Background technique [0002] With the rapid development of economy, people's demand for energy is increasing day by day. Due to the non-renewability of fossil energy and the pollution to the environment, people urgently need new green energy. As the main power source of portable electronic products (such as notebook computers, mobile phones, communication equipment, cameras, etc.), lithium-ion batteries have attracted widespread attention. At present, lithium-ion battery cathode materials mainly include lithium nickelate, olivine lithium iron phosphate, spinel lithium manganate and lithium cobalt oxide, but traditional lithium-ion battery cathode materials are difficult to synthesize, poor thermal stability, and expensive. Therefore, finding n...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a ternary nickel-cobalt lithium manganese oxide material and its preparation method and application. The main technical problem to be solved is to improve the poor cycle stability of the current ternary nickel-cobalt lithium manganese oxide material in the application of lithium battery cathode materials The problem of poor high current discharge capacity

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