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Preparation method of lithium manganate material and method for preparing battery from lithium manganate material

A lithium manganate and the technology of lithium manganate are applied to the preparation method of lithium ion battery materials and the field of batteries prepared from the material, which can solve the problems of poor normal temperature cycle performance of lithium manganate materials, achieve excellent abnormal temperature cycle performance, and improve consistency. The effect of shortening the stirring time

Inactive Publication Date: 2015-05-06
SHANDONG SHENGONGHAITE ELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Another object of the present invention is to provide a method for preparing batteries from the lithium manganate material; to solve the problem of poor cycle performance of the lithium manganate material at room temperature, and to broaden the application field of power batteries

Method used

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  • Preparation method of lithium manganate material and method for preparing battery from lithium manganate material
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  • Preparation method of lithium manganate material and method for preparing battery from lithium manganate material

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Embodiment 1

[0023] Preparation of positive electrode: LiMn 2 O 4 / Carbon nanotubes: Super-P:KS-6:PVDF:NMP=89:3:3:5:45; first dissolve PVDF in NMP, stir for 3h, then add LiMn 2 O 4 After the carbon nanotube composite material and the conductive agent are mixed, the dry powder mixer is used to uniformly disperse and stir, the spindle speed is 23r / min, and the stirring time is 90min. Then add the mixed material into the glue solution, stir at high speed for 4h for dispersion, the low speed revolution speed is 18r / min, the high speed dispersion speed is 2200r / min, and the vacuum degree is -0.095MPa. The stirred slurry is vacuum defoamed and then sieved for coating, dried, rolled, and slit to obtain a positive electrode sheet.

[0024] Preparation of negative electrode: MCMB:Super-P:CMC:SBR:H 2 O=94:2:1.5:2.5:118. First dissolve the CMC in deionized water, stir for 2~3h, then mix the mesocarbon microspheres and the conductive agent, then use a dry powder mixer to evenly disperse and stir, the spi...

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Abstract

The invention discloses a preparation method of a lithium manganate material. The method dislcosed by the invention comprises the following step: uniformly mixing lithium sources and manganese sources in a mole ratio, sending the mixture into a cabinet resistance furnace to sinter at a high temperature, cooling the mixture to room temperature to obtain the lithium manganate material. The method for preparing a battery from the lithium manganate material is characterized by comprising the following steps: ball milling and mixing the lithium manganate material and a chemically purified carbon nano-tube to obtain a composite material of lithium manganate and carbon nano-tube, wherein the composite material of lithium manganate and carbon nano-tube is used as a positive electrode active substance and a mixture of conductive carbon black and KS-6 is used as a conductive agent, modified intermediate-phase carbon microspheres are used as negative electrode active substances and conductive carbon black is used as a conductive agent; and pulping by a dry powder blender and a high-speed mixer.

Description

Technical field [0001] The invention relates to a method for preparing a lithium ion battery material and a method for preparing a battery from the material, in particular to a method for preparing a lithium manganate material and a method for preparing a battery from the lithium manganate material. Background technique [0002] In response to the energy call for low carbon, environmental protection, energy saving and emission reduction, my country has formulated and launched policies to strongly support the development of the new energy automobile industry. Power battery technology is the core of the development of the new energy automobile industry. The development of power batteries with high specific energy, good safety, and excellent rate performance has become a research focus for battery manufacturers. At present, commercialized power batteries are mainly lead-acid batteries, which have exposed obvious defects during long-term use, such as low specific energy, large self-d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/505
CPCB82Y30/00H01M4/04H01M4/364H01M4/505H01M4/587H01M4/625H01M10/0525Y02E60/10
Inventor 关成善宗继月李涛刘艳辉
Owner SHANDONG SHENGONGHAITE ELECTRONICS TECH
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