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Preparation method of lithium-ion-battery anode material with bulk-phase-doped metal elements

A technology for lithium-ion batteries and positive electrode materials, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of unsatisfactory electrochemical performance, few types of doping elements, complex doping process, etc., and achieve ideal electrochemical performance , good doping effect, avoiding the effect of limitations

Active Publication Date: 2016-10-12
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The object of the present invention is to solve the problem of unsatisfactory electrochemical performance caused by the complicated doping process, few types of doping elements, and poor doping effect in the prior art, and provides a lithium doped with metal elements in the bulk phase. Preparation method of ion battery cathode material

Method used

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  • Preparation method of lithium-ion-battery anode material with bulk-phase-doped metal elements
  • Preparation method of lithium-ion-battery anode material with bulk-phase-doped metal elements
  • Preparation method of lithium-ion-battery anode material with bulk-phase-doped metal elements

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specific Embodiment approach 1

[0022] Specific Embodiment 1: The preparation method of the lithium-ion battery positive electrode material doped with metal elements in bulk according to the present embodiment is carried out according to the following steps:

[0023] 1. First prepare the precursor of the positive electrode material of lithium-ion battery by hydrothermal method, co-precipitation method or chemical synthesis method;

[0024]2. Preparation of organometallic salt derivative solution: use ethanol as solvent, add organic chelating agent and organic metal salt to react to generate new organometallic salt derivatives, and prepare organometallic salt with a concentration of 0.5mol / L~3mol / L Derivative solution; the molar ratio of the organic chelating agent to the organometallic salt is (0.1-2): 1, stirred in an oil bath at 50-60°C until the solution is uniform and transparent, and an organometallic salt derivative solution is obtained;

[0025] 3. Vacuum impregnation method to prepare the precursor o...

specific Embodiment approach 2

[0027] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that the organic metal salt is Ni, Co, Mn, Mg, Al, Ca, Zn, Cu, Cr, Zr, Ti, Fe, V, Mo metal alkoxide, phenoxide or a combination of one or more of the above metals and alkoxy, phenoxy, etheroxy, ketooxy, aldehydeoxy, esteroxy, amine groups organometallic salts. Other steps and parameters are the same as those in the first embodiment.

specific Embodiment approach 3

[0028] Specific embodiment three: the difference between this embodiment and specific embodiment one is that the organic chelating agent is acetic acid, glutaric acid, amino acid, ethyl propionate, butyl hydroxypropionate, o-hydroxyphenylacetic acid, acetylacetone, One of benzoylacetone, dimethyl malonate, monoethyl malonate, ethyl butyryl acetate, ethyl levulinate, methyl methoxyacetate, methyl succinic acid, propionic anhydride or a mixture of several. Other steps and parameters are the same as those in the first embodiment.

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Abstract

The invention discloses a preparation method of a lithium-ion-battery anode material with bulk-phase-doped metal elements, relates to the field of secondary batteries, and aims to solve the problem that the doping process is complex, the varieties of doped elements are few, the electrochemical performance is not ideal due to the poor doping effect in the prior art. The preparation method includes the steps of firstly, preparing the precursor of the lithium-ion-battery anode material; secondly, preparing a high-concentration organic metal salt derivative solution; thirdly, using a vacuum impregnation method to prepare the lithium-ion-battery anode material precursor doped by organic metal salt derivatives; fourthly, blending lithium into the lithium-ion-battery anode material precursor doped by the organic metal salt derivatives, and sintering to obtain the lithium-ion-battery anode material with the bulk-phase-doped metal elements. The lithium-ion-battery anode material is applicable to the field of batteries.

Description

Technical field: [0001] The invention relates to the field of secondary batteries, in particular to a method for preparing a lithium-ion battery cathode material doped with metal elements in bulk. Background technique: [0002] Lithium-ion batteries are internationally recognized as an ideal chemical energy source. They have the advantages of long cycle life, high power density, high energy density, and high voltage platform. They are widely used in mobile phones, laptop computers and other electronic products and electric vehicles. The performance of cathode materials is a key factor in determining the performance of lithium-ion batteries. Current commercial cathode materials include LiCoO with a layered structure 2 、LiNi 0.8 co 0.15 al 0.05 o 2 、LiNi 1-x-y CoxM 2 , LiFePO with olivine structure 4 and LiMn with spinel structure 2 o 4 and other cathode materials. Bulk phase doping is one of the important means to improve the electrochemical performance of positive...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/48H01M10/0525
CPCH01M4/362H01M4/48H01M4/483H01M10/0525Y02E60/10
Inventor 杜春雨贺晓书尹鸽平陈诚徐星左朋建程新群马玉林高云智
Owner HARBIN INST OF TECH
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