Method for producing ytterbium-doped lithium nickel cobalt manganese oxide material used for lithium ion battery

A technology of nickel-cobalt lithium manganese oxide and lithium-ion batteries, which is applied in the field of preparation of ytterbium-doped nickel-cobalt lithium manganese oxide materials for lithium-ion batteries, and can solve the problems of difficult growth, small gram capacity, and no objective improvement in discharge capacity and other problems to achieve the effect of improving stability, alleviating volume expansion, and improving capacity fading

Active Publication Date: 2016-12-28
ZHEJIANG CHANGXING KISUN POWER SUPPLY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patented new type of battery eletrode materials have an improved design that allows them to withstand high pressure without losing their effectiveness or performance over time due to changes caused by factors like temperature fluctuations. These improvements help prevent damage from excessive strain on these components while still allowing effective use within specific conditions such as those specified in this patents.

Problems solved by technology

This patents discusses various technical problem addressed by researchers at different stages during the process of developing lithiated ion batteries (LIB). LIB' s main advantage over traditional batteries is their ability to store much greater amounts of electrical charge than previously possible due to their longer lifetimes compared to older designs like LiCoO2. However, there exist challenges associated with current technology design practice: low volumetric efficiency and poor cyclabilities caused by conventional carbon anodes. Lithium transition metal compounds containing tin and/or silicon were developed as alternatives to graphite because they provide better stability and durability while maintaining good conductivity properties when charged quickly without losing any significant amount of stored electrical charges.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A preparation method of ytterbium-doped nickel-cobalt lithium manganese oxide material for lithium-ion batteries, comprising the following steps:

[0031] a) Press LiNi 0.32 co 0.32 mn 0.32 Yb 0.04 o 2 The stoichiometric ratio of lithium carbonate, nickel oxide, cobalt oxide, manganese oxide and ytterbium oxide is weighed so that the molar ratio of Li, Ni, Co, Mn and Yb is 1:0.32:0.32:0.32:0.04, lithium carbonate, nickel oxide The total weight of cobalt oxide, manganese oxide and ytterbium oxide is 200 parts by weight;

[0032] b) Add 200 parts by weight of absolute ethanol to the raw material weighed in step a, and ball mill for 2 hours, then take it out and dry to obtain the raw material of ytterbium-doped nickel-cobalt lithium manganese oxide;

[0033] c) Add 60 parts by weight of acetate fiber and 300 parts by weight of potassium chloride sodium chloride mixed molten salt to the ytterbium-doped nickel-cobalt lithium manganese oxide raw material prepared in step b,

Embodiment 2

[0036] A preparation method of ytterbium-doped nickel-cobalt lithium manganese oxide material for lithium-ion batteries, comprising the following steps:

[0037] a) Press LiNi 0.32 co 0.32 mn 0.32 Yb 0.04 o 2The stoichiometric ratio of lithium carbonate, nickel oxide, cobalt oxide, manganese oxide and ytterbium oxide is weighed so that the molar ratio of Li, Ni, Co, Mn and Yb is 1:0.32:0.32:0.32:0.04, lithium carbonate, nickel oxide The total weight of cobalt oxide, manganese oxide and ytterbium oxide is 200 parts by weight;

[0038] b) Add 240 parts by weight of absolute ethanol to the raw material weighed in step a, and ball mill for 3 hours, then take it out and dry to obtain the raw material of ytterbium-doped nickel-cobalt lithium manganese oxide;

[0039] c) Add 75 parts by weight of acetate fiber and 400 parts by weight of potassium chloride sodium chloride mixed molten salt to the ytterbium-doped nickel-cobalt lithium manganese oxide raw material prepared in step b,

Embodiment 3

[0042] A preparation method of ytterbium-doped nickel-cobalt lithium manganese oxide material for lithium-ion batteries, comprising the following steps:

[0043] a) Press LiNi 0.32 co 0.32 mn 0.32 Yb 0.04 o 2 The stoichiometric ratio of lithium carbonate, nickel oxide, cobalt oxide, manganese oxide and ytterbium oxide is weighed so that the molar ratio of Li, Ni, Co, Mn and Yb is 1:0.32:0.32:0.32:0.04, lithium carbonate, nickel oxide The total weight of cobalt oxide, manganese oxide and ytterbium oxide is 200 parts by weight;

[0044] b) Add 280 parts by weight of absolute ethanol to the raw material weighed in step a, and ball mill for 4 hours, then take it out and dry to obtain the raw material of ytterbium-doped nickel-cobalt lithium manganese oxide;

[0045] c) Add 90 parts by weight of acetate fiber and 500 parts by weight of potassium chloride sodium chloride mixed molten salt to the ytterbium-doped nickel-cobalt lithium manganese oxide raw material prepared in step b,

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Abstract

The invention discloses a method for producing a ytterbium-doped lithium nickel cobalt manganese oxide material used for a lithium ion battery. The method comprises the following steps: a) weighing the raw materials according to stoichiometric ratio; b) adding absolute ethyl alcohol in the raw materials, performing ball milling and taking the materials out and drying the materials; c) adding acetate fibre, potassium chloride and sodium chloride in the raw materials obtained in the step 2) for mixing with molten salt and absolute ethyl alcohol, performing ball milling and drying the materials; and d) sintering the raw materials obtained in the step c), cooling the materials, washing the obtained powder, and drying to obtain the material. The ytterbium-doped lithium nickel cobalt manganese oxide material has higher discharge capacity and gram capacity; and has a hollow tube structure, through further processing, the tube wall is loosening so as to alleviate the volume expansion problem; inorganic filling material titanium dioxide in the acetate fibre is used, and is doped into crystal lattice of the ytterbium-doped lithium nickel cobalt manganese oxide material, so that stability of the ytterbium-doped lithium nickel cobalt manganese oxide material is improved, and the capacity attenuation problem of the lithium ion battery is improved.

Description

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Claims

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Application Information

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Owner ZHEJIANG CHANGXING KISUN POWER SUPPLY
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