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Preparation method of high-power lithium ion battery positive electrode and lithium battery

A cathode material, lithium battery technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of low electron conductivity, instability, low lithium ion diffusion coefficient, etc., and achieve both conductivity and coating effect improvement. Effect

Inactive Publication Date: 2017-10-24
TRON ENERGY TECH CO LTD
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Problems solved by technology

The known synthetic methods of lithium iron phosphate include: sol-gel method (Soi-gel method), co-precipitation method (Co-precipitation method), solid-state reaction method (Solid-state method), spray cracking method (Spray pyrolysis method) ), hydrothermal synthesis method (Hydrothermal method), etc. Although the lithium iron phosphate produced has a special olivine-like structure, the current lithium iron phosphate cathode material still has defects such as low electronic conductivity and low lithium ion diffusion coefficient

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  • Preparation method of high-power lithium ion battery positive electrode and lithium battery
  • Preparation method of high-power lithium ion battery positive electrode and lithium battery
  • Preparation method of high-power lithium ion battery positive electrode and lithium battery

Examples

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no. 1 example

[0028] Please refer to figure 1 , the first embodiment of the present invention provides a method for preparing a high-power lithium battery positive electrode material, which mainly prepares lithium iron phosphate / carbon material by a reduction-solution method; figure 1 As shown, the preparation method includes: step S100, uniformly mixing lithium-containing precursors, iron-containing precursors, carbon-containing solid precursors and phosphate-containing raw materials in a solid phase mixing manner; step S102, performing the solid phase mixture obtained Calcination treatment; step S104, adding a carbon-containing liquid precursor to the obtained calcined product; and step S106, performing sintering treatment on the obtained two-phase mixture.

[0029] When step S100 is actually implemented, solid reactants such as lithium-containing precursors, iron-containing precursors, and carbon-containing solid precursors can be placed in a high-speed mixer and mixed evenly, and then t...

no. 2 example

[0045] Please refer to image 3 , The second embodiment of the present invention further provides a lithium battery L, which mainly includes an isolation layer 1 , a positive electrode structure 2 and a negative electrode structure 3 . From a structural point of view, the isolation layer 1 has a first surface 11 and a second surface 12 opposite to the first surface 11, the positive electrode structure 2 is disposed on the first surface 11 of the isolation layer 1, and the positive electrode structure 2 includes an anode layer 21 and A positive electrode collector layer 22, wherein one side of the positive electrode layer 21 is connected to the first surface 11, the other side of the positive electrode layer 21 is connected to the positive electrode collector layer 22, and the negative electrode structure 3 is arranged on the second surface of the isolation layer 1 12 , the negative electrode structure 3 includes a negative electrode layer 31 and a negative electrode collector ...

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Abstract

The invention discloses a preparation method of a high-power lithium ion battery positive electrode and a lithium battery. The preparation method comprises the following steps of firstly, uniformly mixing a lithium-containing precursor, an iron-containing precursor, a carbon-containing solid precursor and a phosphate group-containing raw material by a solid-phase mixture mode; secondly, performing calcination on the obtained solid-phase mixture; thirdly, adding a carbon-containing liquid precursor into the obtained calcined product; and finally, sintering the obtained two-phase mixture. Therefore, a carbon material can be more effectively coated around surfaces of lithium iron phosphate particles.

Description

technical field [0001] The present invention relates to a preparation method of a lithium battery positive electrode material and a lithium battery, in particular to a preparation method of a high-power lithium battery positive electrode material with reduction-solution method as the main means, and a lithium battery made by applying the preparation method Lithium battery with cathode material. Background technique [0002] Rechargeable lithium batteries (also known as secondary batteries) have many advantages including: high working voltage (3.4-3.8Volt), large energy density (>185Wh / Kg, watt hour / kg), light weight, long life, environmental protection, etc. etc., have been widely used in 3C electronic products, such as mobile phone (Mobile Phone), notebook computer (NB / PC), tablet computer (Tablet PC), video camera (Camcorder) and digital camera (Digital Camera) and so on. According to IIT2009 statistical estimates, the global sales of lithium battery cells reached abou...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/58H01M4/62H01M10/0525
CPCH01M4/366H01M4/5825H01M4/625H01M10/0525Y02E60/10
Inventor 李明宗苏羽秀郭政肇
Owner TRON ENERGY TECH CO LTD
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