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Preparation method of cathode material of lithium-rich ternary compound lithium ion battery

A lithium-ion battery and ternary composite technology, which is applied in battery electrodes, secondary batteries, circuits, etc., can solve problems such as complex preparation processes, and achieve the effects of simple process, uniform precipitation, and easy industrial application

Inactive Publication Date: 2014-07-30
SHANGHAI UNIVERSITY OF ELECTRIC POWER
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] The purpose of the present invention is to provide a preparation method of lithium-rich ternary composite lithium-ion battery positive electrode material in order to solve the technical problems such as the above-mentioned complicated preparation process. Excellent electrochemical performance of lithium ternary composite lithium ion battery cathode material

Method used

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  • Preparation method of cathode material of lithium-rich ternary compound lithium ion battery
  • Preparation method of cathode material of lithium-rich ternary compound lithium ion battery
  • Preparation method of cathode material of lithium-rich ternary compound lithium ion battery

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Embodiment 1

[0045] A preparation method of a lithium-rich ternary composite lithium-ion battery positive electrode material, the lithium-rich ternary composite lithium-ion battery positive electrode material contains Li, Ni, Co, Mn and O elements, and its molecular formula is Li 1.2 Ni 0.13 co 0.13 mn 0.54 o 2 .

[0046] The above-mentioned preparation method of a lithium-rich ternary composite lithium-ion battery positive electrode material specifically includes the following steps:

[0047] (1) Mix 6.3870g (1% excess) of organic precipitant and 55ml of organic solvent according to the ratio of organic precipitant: organic solvent: 1mol:1L, and then stir at a controlled speed of 500r / min and a temperature of 80°C Dissolved to obtain solution 1;

[0048] Described organic precipitation agent is 8-hydroxyquinoline;

[0049] Described organic solvent is ethanol;

[0050] (2) Mix soluble 1.6190g cobalt salt, 1.6176g nickel salt, 6.61742g manganese salt and 6.4273g lithium salt with 50...

Embodiment 2

[0073] A preparation method of a lithium-rich ternary composite lithium-ion battery positive electrode material, the lithium-rich ternary composite lithium-ion battery positive electrode material contains Li, Ni, Co, Mn and O elements, and its molecular formula is Li 1.2 Ni 0.13 co 0.13 mn 0.54 o 2 .

[0074] The above-mentioned preparation method of a lithium-rich ternary composite lithium-ion battery positive electrode material adopts an organic co-precipitation method, which specifically includes the following steps:

[0075] (1) Mix the organic precipitant and the organic solvent according to the ratio of organic precipitant:organic solvent: 0.5mol:1L, and then stir and dissolve under the conditions of controlling the rotational speed at 400r / min and the temperature at 40°C to obtain solution 1;

[0076] Described organic precipitation agent is 8-hydroxyquinoline;

[0077] Described organic solvent is ethanol;

[0078] (2) Combine soluble cobalt salt, nickel salt, ma...

Embodiment 3

[0088] A preparation method of a lithium-rich ternary composite lithium-ion battery positive electrode material, the lithium-rich ternary composite lithium-ion battery positive electrode material contains Li, Ni, Co, Mn and O elements, and its molecular formula is Li 1.2 Ni 0.13 co 0.13 mn 0.54 o 2 .

[0089] The above-mentioned preparation method of a lithium-rich ternary composite lithium-ion battery positive electrode material adopts an organic co-precipitation method, which specifically includes the following steps:

[0090] (1) Mix the organic precipitant and the organic solvent according to the ratio of organic precipitant:organic solvent: 2.5mol:1L, then stir and dissolve under the conditions of controlling the rotation speed at 500r / min and the temperature at 60°C to obtain solution 1;

[0091] Described organic precipitation agent is 8-hydroxyquinoline;

[0092] Described organic solvent is ethanol;

[0093] (2) Combine soluble cobalt salt, nickel salt, manganes...

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Abstract

The invention discloses a preparation method of a cathode material of a lithium-rich ternary compound lithium ion battery. The molecular formula of the cathode material is Li1.2Ni0.13Co0.13Mn0.54O2. The preparation method comprises the steps of firstly, stirring an organic precipitant in constant temperature water bath to dissolve the organic precipitant in an organic solvent to obtain a solution I; after that, ultrasonically dissolving soluble cobalt salt, nickel salt, manganese salt and lithium salt in deionized water to obtain a solution II; then, dropwise adding the solution II into the solution I at constant speed, and carrying out a reaction at the temperature of 40-80 DEG C for 2h-4h; drying at 100-120 DEG C; and heating the obtained solid powder in a high temperature tube furnace system by stages, calcining, and cooling the product to room temperature along with the furnace to obtain the lithium-rich ternary compound lithium ion battery cathode material which is good in electrochemical performance and uniform in particles, and has a spherical or ellipsoidal morphology feature. The preparation technology is simple and suitable for industrial scale production.

Description

technical field [0001] The invention belongs to the technical field of preparation of positive electrode materials for lithium ion batteries, and in particular relates to Li 1.2 Ni 0.13 co 0.13 mn 0.54 o 2 Preparation. Background technique [0002] Lithium cobalt oxide (LiCoO), a commercial cathode material 2 ) developed since [1] , because the capacity of the material itself is only 50% of its theoretical capacity (140mAh / g), coupled with the lack of cobalt resources and environmental pollution problems, scholars from various countries have continued to study in depth and successfully prepared other transition metal oxide cathode materials, such as manganic acid Lithium (LiMnO 2 ), lithium iron phosphate (LiFePO 4 )Wait [2-3] , but the relatively low specific energy or power has become the most fatal shortcoming of this type of material, hindering the further development of these two materials. my country puts forward an energy requirement of 230Wh / kg in 2015 for ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/505H01M4/525
CPCH01M4/505H01M4/525H01M10/0525Y02E60/10
Inventor 徐群杰袁小磊赖春艳靳雪周罗增刘新暖
Owner SHANGHAI UNIVERSITY OF ELECTRIC POWER
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