Manganese-included multi-element metal oxide, lithium ion secondary battery anode material and its preparing method

A multi-metal, secondary battery technology, applied in secondary batteries, manganese compounds, battery electrodes, etc., can solve the problems of processing behavior, poor cycle performance, poor cycle performance, etc., to achieve improved cycle performance, increased agglomerated particles, The effect of improving the specific capacity of charge and discharge

Active Publication Date: 2006-05-10
TIANJIN GUOAN MGL NEW MATERIALS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Some scholars and companies have conducted research on this type of material, but there are still some problems to be solved, such as the processing behavior of the pole piece and poor cycle performance, such as Li(NiCoMn) produced by Honjo Corporation of Japan. 1 / 3 o 2 The sample processing behavior and cycle performance are better than those of LiCoO 2 Poor, our research shows that surface modification of the material to inhibit its adverse reaction with the electrolyte can significantly improve its cycle performance, and the processing behavior of the pole piece can also be improved after adding surfactants during the coating process

Method used

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  • Manganese-included multi-element metal oxide, lithium ion secondary battery anode material and its preparing method
  • Manganese-included multi-element metal oxide, lithium ion secondary battery anode material and its preparing method
  • Manganese-included multi-element metal oxide, lithium ion secondary battery anode material and its preparing method

Examples

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Effect test

Embodiment 1

[0043] Take nickel (Ni), cobalt (Co), and manganese (Mn) sulfates at a molar ratio of 1:1:1 and mix them to prepare 1 L of an aqueous solution with a total metal content of 1 mole. Under nitrogen atmosphere and constant stirring, Slowly drop it into 1L, 2.2M NaOH aqueous solution at 50°C. After 8 hours, the Ni-Co-Mn composite hydroxide was separated, washed several times with distilled water, and then dried in vacuum at 100°C for 10 hours, and its water content was accurately measured. After one part and lithium hydroxide monohydrate (LiOH·H 2 O) Mixed grinding at a molar ratio of 1:1.06, then placed in an intelligent control muffle furnace, under dry air, the temperature was raised to 300°C at 2°C / min and kept at a constant temperature for 6 hours for the first heat treatment, and then heated at 2°C / min to raise the temperature to 750°C and keep the temperature for 16 hours for sintering, then naturally cool the product to room temperature, grind and sieve to obtain the posi...

Embodiment 2

[0048] Take nickel (Ni), cobalt (Co), and manganese (Mn) nitrates in a molar ratio of 8:1:1 and mix them to prepare 1L of an aqueous solution with a total metal content of 2 moles. Under the condition of argon atmosphere and constant stirring, Slowly drop it into 1L, 4.4M KOH aqueous solution at 50°C. After 9 hours, the Ni-Co-Mn composite hydroxide was separated, washed several times with distilled water, and then dried in vacuum at 120°C for 8 hours. Lithium (LiOH·H 2 O) After mixing and grinding at a molar ratio of 1:1.05, place it in an intelligent control muffle furnace. Under dry air, heat up to 320°C at 5°C / min and keep the temperature for 5 hours for the first heat treatment, and then heat at 5°C / min The temperature was raised to 750°C and kept at a constant temperature for 18 hours for sintering, and then the product was naturally cooled to room temperature, ground and sieved to obtain the positive electrode active material LiNi 0.8 co 0.1 mn 0.1 o 2 , and then car...

Embodiment 3

[0053] Take nickel (Ni), cobalt (Co), and manganese (Mn) acetates in a molar ratio of 1:1:1 and mix them to prepare 1L of an aqueous solution with a total metal content of 0.9 moles. Under nitrogen atmosphere and constant stirring , slowly drop it into 1L, 2.2M NaOH aqueous solution at 40°C. After 10 hours, the Ni-Co-Mn composite hydroxide was separated, washed several times with distilled water, and dried under vacuum at 120°C for 10 hours, and mixed with monowater Lithium hydroxide (LiOH·H 2 O) After mixing and grinding at a molar ratio of 1:1.04, place it in an intelligently controlled muffle furnace. In dry air, heat up to 360°C at 5°C / min and keep the temperature for 7 hours for the first heat treatment, and then heat at 5°C / min. The temperature was raised to 750°C and kept at a constant temperature for 20 hours for sintering, then the product was naturally cooled to room temperature, ground and sieved to obtain the positive electrode active material LiNi 1 / 3 co 1 / 3 mn ...

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Abstract

This invention relates to one multi-element metal oxidation and discloses The process method, which comprises the following steps: a, in nitrogen or inertance gas depositing the mixture of cobalt salt, nickel salt and maganism salt to generate Ni-Co-Mn compound hydrogen oxidation to process front drive after drying and grinding; b, adding lithium hydrate into the front drive grinding and processing mixture to remove absorbed water and structure water; c, processing products under degrees of 650 to 850 degrees; d, using high polymer as assistant agent to process surface covering on product; e, processing the product to remove solvent to process multi-metal oxidation.

Description

[technical field] [0001] The present invention relates to inorganic functional materials and high-energy battery technology, specifically, to multi-element metal oxides, positive electrode materials for lithium-ion secondary batteries and their preparation methods, [Background technique] [0002] The preparation of new cathode materials is one of the key technologies restricting the rapid development of lithium secondary batteries. At present, the positive electrode materials commonly used in lithium-ion batteries include lithium cobalt oxide, lithium nickel oxide, and spinel lithium manganese oxide (LiMn 2 o 4 ) and layered lithium manganate (LiMnO 2 ). Lithium cobaltate is currently a commonly used commercial lithium-ion battery cathode material, and its preparation process is very mature, but its wide application is limited due to its poor resources, high price, and poor safety when used as a power battery. Lithium nickelate has the same layered structure as lithium c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G1/02C01G45/00H01M4/505H01M4/525
CPCC01G45/1221C01G51/44C01G53/44C01P2002/52C01P2006/40H01M4/505H01M4/525H01M10/0525Y02E60/10
Inventor 方送生林云青王守峰陈泽伟曾鹏程
Owner TIANJIN GUOAN MGL NEW MATERIALS TECH CO LTD
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