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Electrode material, lithium ion battery and preparation method and application thereof

An electrode material, lithium ion technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of small average diameter, battery capacity retention rate, rate performance and cycle stability.

Active Publication Date: 2019-05-21
SHANGHAI ZIJIAN CHEM TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to overcome the existing preparation method of nickel-cobalt-manganese (aluminum) acid lithium material so that the average diameter of the material itself is relatively small, thereby making the battery capacity retention rate, rate performance and cycle stability of the prepared battery to provide a new type of electrode material, lithium-ion battery and its preparation method and application

Method used

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  • Electrode material, lithium ion battery and preparation method and application thereof
  • Electrode material, lithium ion battery and preparation method and application thereof
  • Electrode material, lithium ion battery and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0073] (9.2g, 0.1mol) precursor Ni 0.6 co 0.2 mn 0.2 (OH) 2 , (9.7g, 0.1mol) seed LiNi 0.6 co 0.2 mn 0.2 o 2 , (4.72g, 0.2mol) LiOH, (11.69g, 0.2mol) NaCl were mixed evenly, put into a corundum crucible, heated to 900°C at a heating rate of 10°C / min, kept for 10 hours, and naturally cooled to room temperature, The mixture was washed three times with deionized water to remove the molten salt, dried in vacuum at 120°C for 3 hours, then placed in a crucible, heated to 750°C at a heating rate of 10°C / min, kept for 6 hours, and naturally cooled to room temperature to obtain the product 1, its chemical formula is LiNi 0.6 co 0.2 mn 0.2 o 2 .

[0074] Wherein, the elemental analysis of the precursor of Example 1 and product 1 is as follows.

[0075] Elemental analysis (ICP) results

[0076] Example 1

Embodiment 2

[0078] (9.2g, 0.1mol) precursor Ni 0.6 co 0.2 mn 0.2 (OH) 2 , (0.97g, 0.01mol) seed LiNi 0.6 co 0.2 mn 0.2 o 2 , (2.9g, 0.121mol) LiOH, (6.43g, 0.11mol) NaCl were mixed evenly, put into a corundum crucible, heated to 900°C at a heating rate of 10°C / min, kept for 10 hours, and naturally cooled to room temperature, The mixture was washed three times with deionized water to remove the molten salt, dried in vacuum at 120°C for 3 hours, then placed in a crucible, heated to 750°C at a heating rate of 10°C / min, kept for 6 hours, and naturally cooled to room temperature to obtain the product 2, its chemical formula is LiNi 0.6 co 0.2 mn 0.2 o 2 .

Embodiment 3

[0080] (9.2g, 0.1mol) precursor Ni 0.8 co 0.1 mn 0.1 (OH) 2 , (9.7g, 0.1mol) seed LiNi 0.8 co 0.1 mn 0.1 o 2 , (4.72g, 0.2mol) LiOH, (11.69g, 0.2mol) NaCl were mixed evenly, put into a corundum crucible, heated to 900°C at a heating rate of 10°C / min, kept for 10 hours, and naturally cooled to room temperature, The mixture was washed three times with deionized water to remove the molten salt, dried in vacuum at 120°C for 3 hours, then placed in a crucible, heated to 750°C at a heating rate of 10°C / min, kept for 6 hours, and naturally cooled to room temperature to obtain the product 3. Its chemical formula is LiNi 0.8 co 0.1 mn 0.1 o 2 .

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Abstract

The invention discloses an electrode material, a lithium ion battery, a preparation method and application thereof. The preparation method comprises the following steps: calcining the mixture of a ternary precursor material, a seed crystal and a lithium ion-containing molten salt in an oxygen-containing atmosphere; wherein the molar ratio of the ternary precursor material to the seed crystal is 2:10-10: 1; the ternary precursor material is nickel-cobalt-manganese hydroxide or nickel-cobalt-aluminum hydroxide. The preparation method can control the average diameter of the obtained electrode material within a proper range, so that the interfacial side reaction of the electrode material in the battery cycle process is reduced, the capacity retention rate of the battery is further improved, and better rate capability and cycle stability are obtained.

Description

technical field [0001] The invention relates to an electrode material, a lithium ion battery and a preparation method and application thereof. Background technique [0002] Lithium cobalt oxide is currently the most widely used lithium battery material, but cobalt resources are increasingly scarce and expensive, seriously affecting its utilization. Nickel cobalt lithium manganese oxide material replaces more than two-thirds of cobalt in lithium cobalt oxide with relatively cheap nickel and manganese, which effectively reduces the cost of the material and expands the source of raw materials, making it a widely concerned and researched material. One of the lithium battery materials. [0003] At present, the existing preparation methods of nickel-cobalt-lithium manganese oxide materials include solid-phase method of directly mixing raw materials or roasting after mixing, co-precipitation method of dissolving, mixing and precipitating raw materials and then drying, and using so...

Claims

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Application Information

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IPC IPC(8): H01M4/485H01M4/505H01M4/525H01M10/0525
CPCY02E60/10
Inventor 李林森钱冠男车海英马紫峰
Owner SHANGHAI ZIJIAN CHEM TECH CO LTD
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