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Spinel phase coated lithium-rich material Li1.87Mn0.94Ni0.19O3, preparation method and application therefor

A lithium-rich material and spinel phase technology, applied in the field of electrochemistry, can solve the problems of poor cycle stability, poor storage performance, and low material gram capacity, and achieve the effects of reducing damage, slowing down direct contact, and improving cycle stability

Inactive Publication Date: 2016-05-25
SHANDONG BAOLI BIOMASS ENERGY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the positive electrode materials of lithium-ion power batteries mainly use lithium manganate, lithium iron phosphate or multi-element oxide positive electrode materials, but the materials have low gram capacity, poor cycle stability and poor storage performance at high rates, and further improvement is needed

Method used

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  • Spinel phase coated lithium-rich material Li1.87Mn0.94Ni0.19O3, preparation method and application therefor
  • Spinel phase coated lithium-rich material Li1.87Mn0.94Ni0.19O3, preparation method and application therefor
  • Spinel phase coated lithium-rich material Li1.87Mn0.94Ni0.19O3, preparation method and application therefor

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Effect test

Embodiment 1

[0034] Lithium-rich material coated with spinel phase surface 1.87 mn 0.94 Ni 0.19 o 3 , including a lithium-rich material and a spinel phase coating layer coated on the outer layer of the lithium-rich material; the lithium-rich material is composed of Li element, Mn element, Ni element and O element, and the Li element, Mn element, The molar ratio of Ni element to O element is 1.87:0.94:0.19:3; the spinel phase cladding layer is manganese spinel.

[0035] The lithium-rich material Li coated on the surface of the spinel phase 1.87 mn 0.94 Ni 0.19 o 3 The preparation method comprises steps:

[0036] 1) Prepare 100ml of a mixed solution of manganese nitrate and nickel nitrate, the molar ratio of manganese nitrate to nickel nitrate is 5:1, and the total concentration of manganese ions and nickel ions in the mixed solution is 0.2mol / L;

[0037] 2) Gradually add 100ml of sodium carbonate solution to the mixture, the concentration of sodium carbonate solution is 0.2mol / L;

...

Embodiment 2

[0050] Lithium-rich material coated with spinel phase surface 1.87 mn 0.94 Ni 0.19 o 3 , including a lithium-rich material and a spinel phase coating layer coated on the outer layer of the lithium-rich material; the lithium-rich material is composed of Li element, Mn element, Ni element and O element, and the Li element, Mn element, The molar ratio of Ni element to O element is 1.87:0.94:0.19:3; the spinel phase cladding layer is manganese spinel.

[0051] The lithium-rich material Li coated on the surface of the spinel phase 1.87 mn 0.94 Ni 0.19 o 3 The preparation method comprises steps:

[0052] 1) Prepare 100ml of a mixed solution of manganese nitrate and nickel nitrate, the molar ratio of manganese nitrate to nickel nitrate is 4.9:1, and the total concentration of manganese ions and nickel ions in the mixed solution is 0.25mol / L;

[0053] 2) Gradually add 100ml of sodium carbonate solution to the mixture, the concentration of sodium carbonate solution is 0.25mol / L...

Embodiment 3

[0062] Lithium-rich material coated with spinel phase surface 1.87 mn 0.94 Ni 0.19 o 3 , including a lithium-rich material and a spinel phase coating layer coated on the outer layer of the lithium-rich material; the lithium-rich material is composed of Li element, Mn element, Ni element and O element, and the Li element, Mn element, The molar ratio of Ni element to O element is 1.87:0.94:0.19:3; the spinel phase cladding layer is manganese spinel.

[0063] The lithium-rich material Li coated on the surface of the spinel phase 1.87 mn 0.94 Ni 0.19 o 3 The preparation method comprises steps:

[0064] 1) Prepare 100ml of a mixed solution of manganese nitrate and nickel nitrate, the molar ratio of manganese nitrate to nickel nitrate is 5.1:1, and the total concentration of manganese ions and nickel ions in the mixed solution is 0.2mol / L;

[0065] 2) Gradually add 100ml of sodium carbonate solution to the mixture, the concentration of sodium carbonate solution is 0.2mol / L; ...

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Abstract

The invention discloses a spinel phase coated lithium-rich material Li1.87Mn0.94Ni0.19O3, a preparation method and an application therefor, and belongs to the electrochemical technical field. The invention discloses a new material used as a lithium ion battery positive electrode, namely the spinel phase coated lithium-rich material Li1.87Mn0.94Ni0.19O3, and the preparation method is simple. When the material is used as the positive electrode material of a button lithium battery, the cycling stability of the button lithium battery under a high rate of 1C (250 mA / g) can be improved, and a relatively high specific capacity can be ensured as well; at present, the stable cycling performance of the button lithium battery under the rate of 1C is improved to be more than 200 circles; and meanwhile, the capacity is kept at about 180mA / g.

Description

technical field [0001] The invention relates to the technical field of electrochemistry, in particular to a spinel phase-coated lithium-rich material Li 1.87 mn 0.94 Ni 0.19 o 3 , its preparation method and its application. Background technique [0002] In recent years, with the increasingly serious energy and environmental problems and the requirement of light weight electronic products, people's research on lithium-ion batteries has been deepening. [0003] At present, the cathode materials of lithium-ion power batteries mainly use lithium manganese oxide, lithium iron phosphate or multi-element oxide cathode materials, but the materials have low gram capacity, poor cycle stability and poor storage performance at high rates, and continue to be improved. Contents of the invention [0004] In order to make up for the deficiencies of the prior art, the present invention provides a spinel phase-coated lithium-rich material Li 1.87 mn 0.94 Ni 0.19 o 3 , its preparatio...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/505H01M4/525H01M4/62H01M10/0525B82Y30/00
CPCB82Y30/00H01M4/366H01M4/505H01M4/525H01M4/628H01M10/0525Y02E60/10
Inventor 王云鹤左斌雷军田占军
Owner SHANDONG BAOLI BIOMASS ENERGY
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