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A kind of ternary nickel cobalt lithium manganese oxide material and its preparation method and application

A technology of nickel-cobalt lithium manganese oxide and oxalic acid, which is applied in the direction of electrical components, positive electrodes, active material electrodes, etc., and can solve the problems of poor high-current discharge capacity and poor cycle stability

Active Publication Date: 2021-09-14
HEFEI UNIV OF TECH
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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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  • A kind of ternary nickel cobalt lithium manganese oxide material and its preparation method and application
  • A kind of ternary nickel cobalt lithium manganese oxide material and its preparation method and application
  • A kind of ternary nickel cobalt lithium manganese oxide material and its preparation method and application

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[0033] The technical solutions in the embodiments of the present invention will be clearly and completely described below, obviously, the described embodiments are only some of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0034] A preparation method of a ternary nickel cobalt lithium manganate material, comprising the following steps:

[0035] (1) According to the stoichiometric ratio n(Co):n(Mn):n(oxalic acid)=1:1:2, dissolve 1.5mmol cobalt acetate, 1.5mmol manganese acetate, and 3mmol oxalic acid in 15ml, 15ml, and 30ml of oxalic acid, respectively. In ionized water, place oxalic acid in deionized water for magnetic stirring to obtain an oxalic acid solution. The magnetic stirring time is 30 min, and the stirring speed is 250 r / min. Then, pl...

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Abstract

The invention discloses a ternary nickel-cobalt lithium manganese oxide material and a preparation method thereof. Cobalt manganese oxide is used as a template, cobalt source and manganese source, nickel acetate hexahydrate and lithium carbonate are used as nickel source and lithium source, and deionized Water is used as the solvent. First, cobalt-manganese oxalate is synthesized by hydrothermal method, and then the precursor of cobalt-manganese oxide is obtained after calcination in air. Finally, nickel source and lithium source are added and mixed evenly by ball milling, and then oxygen is introduced into the tube furnace for sintering. A ternary nickel cobalt lithium manganate material is obtained. The specific surface area of ​​the ternary nickel-cobalt lithium manganate material of the present invention is large, which is beneficial to the full contact between the electrolyte and the active material and ion transmission, increases the active sites of the reaction, and overcomes the high current of the ternary nickel-cobalt lithium manganate material The disadvantage of poor discharge capacity, when used as a cathode material for lithium-ion batteries, greatly improves the electrochemical performance, enhances cycle stability and rate performance.

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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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/505H01M4/525H01M10/0525
CPCH01M4/505H01M4/525H01M10/0525H01M2004/028Y02E60/10
Inventor 张勇唐松章吴玉程张雪茹陈鑫洪崔接武王岩秦永强舒霞
Owner HEFEI UNIV OF TECH
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