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Method for producing high-capacity 523-type ternary positive material

A cathode material, high-capacity technology, applied in electrical components, battery electrodes, circuits, etc., can solve the problems of unstable grain structure, poor control of crystal transformation, and low bonding coefficient of ternary composite materials, and achieve significant implementation effects. , Wide range of uses, good product technical performance

Active Publication Date: 2014-05-14
HENAN FUSEN NEW ENERGY TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation method improves the discharge capacity of the battery by doping metals, but the combination coefficient of the ternary composite material is low, the prepared grain structure is relatively unstable, and the control of crystal transformation is poor

Method used

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  • Method for producing high-capacity 523-type ternary positive material
  • Method for producing high-capacity 523-type ternary positive material
  • Method for producing high-capacity 523-type ternary positive material

Examples

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Effect test

Embodiment 1

[0029] A method for producing a high-capacity 523-type ternary cathode material, comprising the steps of:

[0030] a. Raw material mixing: use nickel hydroxide cobalt manganese Ni 0.5 co 0.2 mn 0.3 (OH) 2 The ternary precursor is 75kg, the molar ratio of lithium carbonate content and nickel, cobalt and manganese content is 1.04:1, and the high-speed mixer is used to dry mix evenly, so as to realize the molecular level mixing of lithium, nickel, cobalt, manganese and additive elements;

[0031] b. Three times of sintering: the uniformly mixed raw materials are sintered in a tunnel kiln once, sintered at 650°C for 5 hours, the ternary semi-finished products sintered for the first time are crushed, and then put into the roller kiln for the second sintering, and the sintering temperature is 815°C for 10 hours; The secondary sintered ternary product is pulverized and put into the roller kiln for third sintering; the sintering temperature is 915°C and kept for 10 hours; during the ...

Embodiment 2

[0035] A method for producing a high-capacity 523-type ternary cathode material, comprising the steps of:

[0036] a. Raw material mixing: use nickel hydroxide cobalt manganese Ni 0.5 co 0.2 mn 0.3 (OH) 2 The ternary precursor is 75kg, the molar ratio of lithium carbonate content and nickel-cobalt-manganese content is 1.06:1, and titanium dioxide with a finished product content of 0.4% is added as an additive, and the high-speed mixer is used for dry mixing to achieve lithium, nickel, cobalt, manganese, and additives. Elements are mixed at the molecular level;

[0037] b. Three times of sintering: the uniformly mixed raw materials are sintered in a tunnel kiln once, sintered at 645°C for 4 hours, the ternary semi-finished products sintered for the first time are crushed, and then put into the roller kiln for the second sintering, and the sintering temperature is 810°C for 12 hours; then The secondary sintered ternary product is pulverized and put into a roller kiln for ...

Embodiment 3

[0040] A method for producing a high-capacity 523-type ternary cathode material, comprising the steps of:

[0041] a. Raw material mixing: use nickel hydroxide cobalt manganese Ni 0.5 co 0.2 mn 0.3 (OH) 2 The ternary precursor is 75kg, the molar ratio of lithium carbonate content and nickel-cobalt-manganese content is 1.06:1, and titanium dioxide with a finished product content of 0.4% is added as an additive, and the high-speed mixer is used for dry mixing to achieve lithium, nickel, cobalt, manganese, and additives. Elements are mixed at the molecular level;

[0042] b. Three times of sintering: the uniformly mixed raw materials are sintered in a tunnel kiln once, sintered at 640°C for 4.5 hours, the ternary semi-finished products sintered at the first sintering are crushed, and then put into the roller kiln for the second sintering, and the sintering temperature is 830°C for 13 hours; The secondary sintered ternary product is pulverized and put into a roller kiln for...

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Abstract

The invention discloses a method for producing a high-capacity 523-type ternary positive material. The method comprises process steps of mixing raw materials, sintering for three times and treating after sintering. Based on the performance characteristics of a ternary material, a three-time sintering and synthesizing process comprising primary low-temperature sintering of a tunnel kiln and secondary sintering of a roller kiln in sufficient reaction phases, and a high-temperature keeping treatment phase of the roller kiln is adopted so that a crystal structure of the product is complete and stable; the crystal structure has smooth transition and whole result standardization of nickel, cobalt and manganese is realized; the overall performance is improved. According to the method, the synthesizing process is simple and the process is easy to control; the energy consumption is low, the efficiency is high and the cost is low; the method is suitable for industrialized production; the product is high in technical performances and high in quality; the implementation effect is obvious and the application is wide so that the method has very good popularization and application values.

Description

technical field [0001] The invention belongs to the technical field of lithium ion battery cathode material powder processing, and in particular relates to a method for producing high-capacity 523-type ternary cathode material. Background technique [0002] In recent years, in response to the negative impacts such as environmental pollution and the sharp consumption of oil resources brought about by the rapid development of the automobile industry, countries are actively conducting research on electric vehicles (EV) and hybrid electric vehicles (HEV) using clean energy. Among them, the power battery as vehicle power has become the main bottleneck in the development of EV and HEV. As one of the core parts of lithium-ion batteries, cathode materials for lithium-ion batteries have always been the focus of research and development. Improving the performance of cathode materials is the key to improving the performance of lithium-ion batteries. The quality of the cathode material...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/505H01M4/525
CPCH01M4/505H01M4/525Y02E60/10
Inventor 曹长城高云
Owner HENAN FUSEN NEW ENERGY TECH
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