Preparation method of manganese containing nickel cobalt lithium oxide

A nickel-cobalt-lithium, manganese oxidation technology, applied in the direction of alkaline storage battery electrodes, electrical components, battery electrodes, etc., can solve the problems of complex production process and high cost, achieve the goal of reducing production process, reducing production cost and improving the first discharge capacity Effect

Inactive Publication Date: 2006-03-29
CHINA ELECTRONIC TECH GRP CORP NO 18 RES INST
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  • Summary
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AI Technical Summary

Problems solved by technology

At present, the preparation method of manganese-containing nickel-cobalt oxide is mainly: first, the soluble nickel source, manganese source, cobalt source and doping element compound are precipitated under alkaline conditions into intermediate products, such as carbonates of nickel, manganese and cobalt, The hydroxide or basic carbonate mixture is washed and dried and then mixed with a lithium source, and finally sintered at a high temperature. This method first uses a precipitant to prepare an intermediate product, which makes the production process relatively complicated and leads to high cost, and The first discharge capacity is lower than the subsequent discharge capacity

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Example 1: The following compounds are calculated at 100% purity, and 0.053 moles of lithium carbonate are weighed according to the atomic concentration ratio of lithium, manganese, nickel, cobalt and aluminum Li:Mn:Ni:Co:Al=1.06:0.38:0.38:0.2:0.04 3.916g, 0.1mol manganese acetate 24.494g, 0.0333mol basic nickel carbonate 12.53g, 0.1mol cobalt carbonate 11.89g, 0.02mol alumina 1.020g, mix and grind for 60min, pass through a 100-mesh sieve, add 30ml of ethanol to the mixture and soak for 1 After 6 hours of mixing, put it in a ball mill at 140 rpm and mix it for 6 hours, put it into an 80°C air drying oven to dry for 15 hours, take out and grind it through a 100-mesh sieve to obtain a loose precursor, and place the precursor at a high temperature. In the sintering furnace, the temperature was raised to 400°C for 15 hours at a temperature of 2°C / min, and then heated to 1000°C for 24 hours at the same rate, and finally lowered to room temperature at the same temperature rate...

Embodiment 2

[0027] Example 2: The following compounds are calculated at 100% purity. According to the atomic concentration ratio of manganese, nickel, cobalt and aluminum, Mn:Ni:Co:Al=0.38:0.38:0.2:0.04, weigh 0.1 mole of manganese acetate 24.494g, 0.0333 mole of alkali Formula nickel carbonate 12.53g, 0.1 mole cobalt carbonate 11.89g, 0.02 mole alumina 1.020g, mix and grind for 60min and pass through a 100-mesh sieve, add 30ml of ethanol to the mixture, soak for 1 hour, put it in a ball mill and ball mill at 140 rpm Mixing for 6 hours, and then ball-milling with lithium hydroxide or lithium carbonate in the lithium source for 6 hours, the sum ratio of the lithium hydroxide or lithium carbonate and the metal atom concentration in the mixture is 0.98-1.2:1, and the mixed material after ball milling Put it into a 100°C air drying oven for 15 hours to dry, take out and grind it through a 100-mesh sieve to obtain a loose precursor, and place the precursor in a high-temperature sintering furnac...

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PUM

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Abstract

The invention relates to a method for preparing Mn-containing NiCoLi oxide in the technical field of Li-ion battery anode material, mainly mixing lithium hydroxide or lithium carbonate with bivalent Ni source, bivalent Mn source, bivalent Co source and compound of doping element, then adding in solvent for ball-milling, drying and screening, and finally sintering in the air to make it. The method reduces producing procedures and production cost; by doping and special processing modes, improves circulating stability and raises primary discharging content, thus playing the role in promoting the development of Li-ion batteries.

Description

technical field [0001] The invention belongs to the technical field of positive electrode materials for chemical power supply lithium ion batteries, in particular to a method for preparing manganese-containing nickel-cobalt oxide lithium. Background technique [0002] At present, due to the characteristics of high specific energy, high specific power and good high temperature performance, lithium-ion batteries have become a new type of environmentally friendly green power source that is well received by people. The commercial cathode material of lithium ion battery is mainly lithium cobalt oxide, but its high price has affected the development of lithium ion battery. Now researchers in the field use manganese-doped nickel-cobalt oxide lithium or Li x [Ni y Mn z Co w M v ]O 2 The synthesis method prepares the positive electrode material, M includes lithium, magnesium, aluminum, gallium and titanium or a combination thereof. and LiCoO 2 In contrast, this cathode materi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/26H01M4/48H01M4/485H01M4/62
CPCY02E60/124Y02E60/10
Inventor 高英龚金保付亚娟高洪森韩宇黄玉兰
Owner CHINA ELECTRONIC TECH GRP CORP NO 18 RES INST
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