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Lithium ion electrode and lithium ion battery

A lithium-ion battery and lithium-ion technology, applied to battery electrodes, secondary batteries, non-aqueous electrolyte battery electrodes, etc., can solve the problems of increasing battery internal resistance DC impedance, low released capacity, and affecting user experience, etc., to improve Use experience, discharge capacity improvement, significant effect of discharge capacity

Pending Publication Date: 2019-03-01
安普瑞斯(无锡)有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At the same time, the surface residue of the finished foil will contain such polymer materials, such as gelatin, etc. The existence of such substances will increase the internal resistance and DC resistance of the battery. Low capacity seriously affects user experience

Method used

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  • Lithium ion electrode and lithium ion battery
  • Lithium ion electrode and lithium ion battery
  • Lithium ion electrode and lithium ion battery

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Embodiment 1

[0025] Battery type: X1

[0026] Positive electrode system: lithium cobaltate (coated, doped): negative electrode system: graphite and silicon carbon mixture. Physical and chemical properties of lithium cobaltate: D50 is 15.5μm; specific surface area is 0.27m2 / g; the compaction density of positive electrode sheet is 3.8-4.2g / cm3; 0.2C capacity is 170-175mAh / g. The physical and chemical indicators of the negative electrode: the median diameter is 20.0μm; the specific surface area is 1.8m2 / g; the compaction density of the negative electrode sheet is 1.7-1.8g / cm3;

[0027] Electrolyte system: ethyl propionate EP, propylene carbonate PC, ethylene carbonate EC (volume ratio 1:1:1)

[0028] The positive electrode active material LiCo 2 , the positive electrode binder PVDF, the conductive agent carbon black, and the solvent NMP are mixed in a proportion of 100:1.6.1.2:45 to prepare the slurry, and the slurry is uniformly coated on the aluminum foil by the coating method of this inv...

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Abstract

The invention relates to a lithium ion electrode and a lithium ion battery. The lithium ion electrode is prepared by the following steps: pretreating an electrode base material before coating; performing plasma cleaning and corona on the electrode base material through a plasma cleaning device and a corona device in a winding / unwinding mechanism respectively; coating the electrode base material with an electrode material by a coating machine head through a plurality of transmission rollers; performing high-temperature air drying through a coating oven to obtain the lithium ion electrode. According to the lithium ion electrode prepared by the electrode preparation method disclosed by the invention, the electrode adhesion is remarkably enhanced, and the drop phenomenon of an electrode platein the manufacturing process is avoided. The lithium ion battery prepared by using the electrode has low impedance, the discharge capacity is remarkably increased at low temperature and normal temperature, and the using experience of the battery is noticeably improved.

Description

technical field [0001] The invention relates to the technical field of lithium ion batteries, in particular to a lithium ion electrode and a lithium ion battery. Background technique [0002] Lithium-ion has been widely used in portable battery products due to its advantages of high energy density, high working voltage, long cycle life, environmental protection and safety. With the continuous development of the battery industry, portable consumer battery products have more and more functions, and the market demand is strong. The requirements for battery manufacturing technology are also getting higher and higher. Generally, aluminum foil metal foil is used as the base material for the positive electrode of lithium-ion batteries, and copper foil is used as the base material for the negative electrode. During the production process of the substrate, a small amount of polymer additives will be added to the electrolyte for leveling. At the same time, the surface residue of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/139H01M4/13H01M10/0525
CPCH01M4/13H01M4/139H01M10/0525Y02E60/10
Inventor 徐子福张小海严涛张明慧翟传鑫
Owner 安普瑞斯(无锡)有限公司
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