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Zirconium-doped lithium-rich cathode material of lithium ion battery and preparation method of zirconium-doped lithium-rich cathode material

A lithium-rich cathode material, lithium-ion battery technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of mixed cations, low capacity of cathode materials, and poor rate performance, and achieve high production efficiency and reaction conditions. Easy-to-control, low-cost effects

Active Publication Date: 2015-11-25
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a zirconium-doped lithium-ion battery lithium-rich positive electrode material and a preparation method thereof in order to solve the above-mentioned technical problems such as low capacity, poor rate performance, and mixed cations of the positive electrode material mentioned above. The process is simple, the source of materials is wide, the reaction conditions are easy to control, it is beneficial to reduce the agglomeration of particles, and the specific capacity and rate of the battery have been greatly improved and improved.

Method used

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  • Zirconium-doped lithium-rich cathode material of lithium ion battery and preparation method of zirconium-doped lithium-rich cathode material
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  • Zirconium-doped lithium-rich cathode material of lithium ion battery and preparation method of zirconium-doped lithium-rich cathode material

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Embodiment 1

[0036] A preparation method of a Zr-doped lithium-ion battery lithium-rich positive electrode material, the Zr-doped lithium-ion battery lithium-rich positive electrode material contains Li, Ni, Co, Mn, Zr and O elements, and its molecular formula is Li 1.2 (Mn 0.54 Ni 0.13 co 0.13 ) 1-x Zr x o 2 (x=0.03).

[0037] The preparation method of the above-mentioned Zr-doped lithium-ion battery lithium-rich cathode material specifically comprises the following steps:

[0038] a. Dissolve 2.5214g oxalic acid in 20ml deionized water, sonicate for 20min, stir and dissolve to obtain solution A;

[0039] b, 0.6282g cobalt acetate, 0.6276g nickel acetate, 2.5676g manganese acetate, 0.2576g zirconium nitrate and 2.5709g lithium acetate are dissolved in 40ml deionized water, according to the total of soluble cobalt salt, nickel salt, manganese salt and lithium salt Molar weight: Deionized water is mixed at a ratio of 1mol:1L and then ultrasonicated for 20 minutes to obtain solution B...

Embodiment 2

[0056] A preparation method of a Zr-doped lithium-ion battery lithium-rich positive electrode material, the Zr-doped lithium-ion battery lithium-rich positive electrode material contains Li, Ni, Co, Mn, Zr and O elements, and its molecular formula is Li 1.2 (Mn 0.54 Ni 0.13 co 0.13 ) 1-x Zr x o 2 (x=0.01).

[0057] The above-mentioned preparation method of a Zr-doped lithium-ion battery lithium-rich positive electrode material specifically comprises the following steps:

[0058] a. Dissolve 2.5214g oxalic acid in 20ml deionized water, sonicate for 20min, stir and dissolve to obtain solution A;

[0059] b, 0.6411g cobalt acetate, 0.6405g nickel acetate, 2.6205g manganese acetate, 0.08586g zirconium nitrate and 2.5709g lithium acetate are dissolved in 40ml deionized water, according to the total of soluble cobalt salt, nickel salt, manganese salt and lithium salt Molar weight: Deionized water is mixed at a ratio of 0.5mol:1L and then ultrasonicated for 20 minutes to obtai...

Embodiment 3

[0063] A preparation method of a Zr-doped lithium-ion battery lithium-rich positive electrode material, the Zr-doped lithium-ion battery lithium-rich positive electrode material contains Li, Ni, Co, Mn, Zr and O elements, and its molecular formula is Li 1.2 (Mn 0.54 Ni 0.13 co 0.13 ) 1-x Zr x o2 (x=0.02).

[0064] The above-mentioned preparation method of a Zr-doped lithium-ion battery lithium-rich positive electrode material specifically comprises the following steps:

[0065] a. Dissolve 2.5214g oxalic acid in 20ml deionized water, sonicate for 20min, stir and dissolve to obtain solution A;

[0066] b, 0.6346g cobalt acetate, 0.6341g nickel acetate, 2.5940g manganese acetate, 0.1717g zirconium nitrate and 2.5709g lithium acetate are dissolved in 40ml deionized water, according to the total of soluble cobalt salt, nickel salt, manganese salt and lithium salt Molar weight: Deionized water is mixed at a ratio of 0.75mol:1L, and solution B is obtained under ultrasonication...

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Abstract

The invention relates to a zirconium-doped lithium-rich cathode material of a lithium ion battery and a preparation method of the zirconium-doped lithium-rich cathode material, and belongs to the technical field of inorganic materials. A chemical formula of the zirconium-doped lithium-rich cathode material of the lithium ion battery provided by the invention is Li1.2(Mn0.54Ni0.13Co0.13)1-xZrxO2 (x is less than 1 and greater than 0); the adopted preparation method is a hydrothermal method; the preparation method is simple; the reaction condition is easy to control; reduction of agglomeration of particles is facilitated; and the chemical reaction in a hydrothermal system has relatively high reaction rate. The zirconium element doped into the zirconium-doped lithium-rich cathode material of the lithium ion battery prepared by the method is relatively low in dosage; the reached effect is very obvious; and compared with the non-doped material, according to the material doped with 3% of zirconium, the performances such as the specific capacity and the rate of the battery are greatly improved.

Description

technical field [0001] The invention relates to a lithium-ion battery electrode material, in particular to a zirconium-doped lithium-ion battery lithium-rich cathode material and a preparation method thereof. Background technique [0002] With the further improvement of the energy density of lithium-ion batteries, its application fields will gradually be applied to electric vehicles (electric bicycles, electric vehicles, hybrid vehicles), power grids and other large-scale energy storage fields. The development of cathode materials for lithium-ion batteries has become a key factor restricting the further improvement of the energy density of lithium-ion batteries. Currently commonly used positive electrode materials are: lithium cobalt oxide (LCO), lithium manganese oxide (LMO), lithium iron phosphate (LFP), etc., but the specific capacity of these positive electrode materials is mostly <160mAh / g. Only by developing new high-capacity cathode materials can we hope to furthe...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/505H01M4/525H01M4/1391H01M10/0525
CPCH01M4/1391H01M4/36H01M4/505H01M4/525H01M10/0525Y02E60/10
Inventor 徐群杰刘新暖常幸萍闵宇霖
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER
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