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Cyclic type ternary lithium battery and preparation method of positive and negative electrodes

A ternary lithium battery, cycle-type technology, applied in the direction of battery electrodes, non-aqueous electrolyte battery electrodes, circuits, etc., can solve the problem that the cycle performance of ternary batteries is not obvious, and achieve reasonable configuration, small specific surface area, homogenization The effect of simple process

Inactive Publication Date: 2018-05-15
JIANGSU FRONT NEW ENERGY +1
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  • Claims
  • Application Information

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Problems solved by technology

The most important thing is that these positive measures do not significantly improve the cycle performance of ternary batteries

Method used

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  • Cyclic type ternary lithium battery and preparation method of positive and negative electrodes

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Embodiment Construction

[0020] The present invention is further illustrated below by way of examples.

[0021] The invention is a circulation type ternary lithium battery, which includes a positive pole, a negative pole, a conductive agent, a diaphragm and an electrolyte. The positive electrode is a sheet-like member, and its surface is coated with positive electrode slurry. The positive electrode slurry is mainly composed of ternary materials. ~6%, PVDF3~6%, the positive electrode slurry is blended with NMP. The negative electrode is also a sheet member, and its surface is coated with negative electrode slurry. The negative electrode slurry is mainly composed of soft carbon and artificial graphite mixed materials. 89~95%, conductive agent 2.5~6%, CMC1.5~4.5%, SBR1.5~3%, negative electrode slurry is mixed with water. The ternary material used in the present invention is a nickel-cobalt-manganese system material, and the particle size of the material is micron level. Because the particle size is rel...

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Abstract

The invention discloses a cyclic type ternary lithium battery. The cyclic type ternary lithium battery comprises a positive electrode, a negative electrode, a conducting agent, a diaphragm and electrolyte, wherein the surface of the positive electrode is coated with positive slurry which is prepared from the following materials in percentage by weight in dry powder: 90-95% of ternary material, 2-6% of conducting agent and 3-6% of PVDF (Polyvinylidene Fluoride); the positive slurry is blended by using NMP (N-Methyl Pyrrolidone). The surface of the negative electrode is coated with negative slurry which is prepared from the following materials in percentage by weight in the dry powder: 89-95% of soft carbon and artificial graphite mixed material, 2.5-6% of conducting agent, 1.5-4.5% of CMC (carboxymethyl cellulose) and 1.5-3% of SBR (styrene butadiene rubber); the negative slurry is blended by using water. The invention also relates to a preparation method of the positive electrode and the negative electrode of the cyclic type ternary lithium battery. The product prepared by the invention not only has high cyclic times, but also is stable. Proved by the above, the product prepared bythe invention has good overcharge-preventing capability so as to ensure safe use.

Description

technical field [0001] The invention relates to a lithium battery and an electrode. Specifically, the invention relates to a cycle type lithium battery and an electrode, especially a cycle type ternary lithium battery with overcharge protection capability. The invention also relates to a preparation method for the positive and negative electrodes of the circulation type ternary lithium battery. Background technique [0002] With the advancement of new energy equipment manufacturing technology, mass-produced lithium batteries have been widely used. It not only occupies an absolute quota in the field of traditional electronic equipment, but also has a large market share in the field of new energy vehicles. The positive electrodes of commercially available lithium batteries are mainly made of lithium cobalt oxide, lithium iron phosphate, lithium manganate, and ternary materials. Due to environmental protection problems when using lithium cobalt oxide to make the positive elect...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/525H01M4/505H01M4/13
CPCH01M4/13H01M4/505H01M4/525Y02E60/10
Inventor 肖莹
Owner JIANGSU FRONT NEW ENERGY
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