Lithium manganese cobalt nickle oxygen of manganese cobalt nickle triple lithium ionic cell positive material and its synthesizing method

Abstract

The invention belongs to a manganese cobalt nickel three Yuan lithium ionization cell anode material, specifically relates to the lithium manganese cobalt nickel oxygen and its synthetic method. The high-capacity, the high safety performance of other battery positive electrode material is unable to compare with lithium manganese cobalt nickel oxygen, moreover low in price, the good compatibility with the electrolyte, the outstanding circulation performance, will certainly to thrust the market in the recent several years. The chemical formula of lithium manganese cobalt nickel oxygen is: The LiMn1/2Co1/4Ni1/4O2 crystal structure is a hexagonal system. The synthetic method of lithium manganese cobalt nickel oxygen is: (1) preparing the mix solution which is composed by the manganese salt, the cobalt blue, the nickel salt, under the agitation situation, joining the alloy salt brine, the complexing agent simultaneously in the reacting system according to the certain proportion distinction, simultaneously adjusts the join speed of alkali to maintain pH to be constant; After continuous feed certain times, filtrate and wash the precipitate to obtain the forerunner body. (2) Grinding and mixing lithium source element and forerunner body ball, after mixed evenly, compacting, roasting, and decomposing to obtain the lithium manganese cobalt nickel oxygen. Then cooling, grading, mixing to obtain the product.

Description

technical field [0001] The invention belongs to a manganese-cobalt-nickel ternary lithium-ion battery cathode material, and in particular relates to lithium-manganese-cobalt-nickel-oxygen and a synthesis method thereof. Background technique [0002] Lithium-ion batteries have the advantages of high specific energy, high power density, long cycle life, small self-discharge, high performance and price, and less pollution. They are the main choice of rechargeable sources for today's portable electronic products. Due to the low specific capacity of cathode materials and the need to additionally bear the irreversible capacity loss of the anode, the research and improvement of cathode materials has always been a key issue in the research of lithium-ion batteries. At present, the main positive electrode materials are lithium cobalt oxide, lithium manganese oxide, lithium iron phosphate, lithium nickel cobalt oxide and lithium manganese cobalt nickel oxide. [0003] Lithium cobalt ...

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Problems solved by technology

In LiNi 1 / 3 co 1 / 3 mn 1 / 3 o 2 The synthesis and properties of (Power Technology, 2005.No.8) also described about LiNi 1 / 3 co 1 / 3 mn 1 / 3 o 2 research, but as for LiNi 1 / 4 co 1 / 4 mn 1 / 2 o 2 research has not yet been reported

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