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High-nickel positive electrode-lithium carbon negative electrode lithium ion battery and preparation method thereof

A lithium-ion battery and negative electrode technology, applied in the direction of secondary batteries, battery electrodes, battery pack components, etc., can solve problems such as the energy density of lithium-ion batteries, improve the first discharge efficiency, increase the discharge voltage platform, reduce The effect of polarization

Inactive Publication Date: 2021-03-05
LONG POWER SYST NANTONG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Lithium-ion batteries made of these positive / negative electrode materials are difficult to achieve higher energy density

Method used

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  • High-nickel positive electrode-lithium carbon negative electrode lithium ion battery and preparation method thereof
  • High-nickel positive electrode-lithium carbon negative electrode lithium ion battery and preparation method thereof
  • High-nickel positive electrode-lithium carbon negative electrode lithium ion battery and preparation method thereof

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Embodiment Construction

[0040] Such as Figure 1 to Figure 4 As shown, a lithium ion battery with a high nickel positive electrode and a lithium carbon negative electrode, the lithium ion battery includes a positive electrode sheet 1, a negative electrode sheet 2, a ceramic diaphragm 3, an electrolyte and a battery case 4, a positive electrode sheet 1, a ceramic diaphragm 3, and a negative electrode sheet 2. The ceramic separator 3 is stacked repeatedly in sequence to form a dry cell. The lithium-ion battery is made by putting the dry cell into the battery case 4 and injecting electrolyte, forming an opening, sealing, and dividing the capacity. The positive electrode sheet 1 and the negative electrode sheet 2 They are multi-element high-nickel positive electrode sheet and lithium-carbon composite negative electrode sheet respectively. The positive electrode sheet 1 is provided with reserved tabs 11 for the positive electrode sheet on both sides, and the negative electrode sheet 2 is provided with rese...

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Abstract

The invention discloses a high-nickel positive electrode-lithium carbon negative electrode lithium ion battery and a preparation method thereof, the lithium ion battery comprises a positive electrodeplate, a negative electrode plate, a ceramic diaphragm, an electrolyte and a battery shell, the positive electrode plate, the ceramic diaphragm, the negative electrode plate and the ceramic diaphragmare sequentially and repeatedly laminated to form a dry battery cell; the lithium ion battery is prepared by putting a dry battery cell into a battery shell, injecting electrolyte, opening for formation, sealing and grading capacity, and is characterized in that a positive plate and a negative plate are respectively a multi-element high-nickel positive plate and a lithium-carbon composite negativeplate, positive plate reserved tabs are arranged on the front surface and the back surface of the positive plate, and negative plate reserved tabs are arranged on the front surface and the back surface of the negative plate; through application of preferred materials and optimization of the process technology, the mass energy density of the prepared lithium ion battery reaches 350 wh / kg or above,and the lithium ion battery is very suitable for application in the fields of 3C, power, energy storage and the like.

Description

technical field [0001] The invention relates to the technical field of secondary lithium batteries, in particular to a high-nickel positive electrode-lithium carbon negative electrode lithium ion battery and a preparation method thereof. Background technique [0002] Lithium-ion batteries have the advantages of high working voltage, high specific energy, and no memory effect. ion battery. At present, the positive electrode materials used in commercial lithium-ion batteries are mainly lithium iron phosphate, lithium cobaltate, lithium manganese oxide and lithium nickel-cobalt manganese oxide, and the negative electrode materials used are mainly mesophase carbon microspheres and artificial graphite. It is difficult for lithium-ion batteries made of these positive / negative electrode materials to achieve higher energy density. [0003] The main electrical performance indicators that affect energy density are: discharge voltage platform, discharge current rate, and discharge sp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/0525H01M4/62H01M4/74H01M50/434H01M10/0585
CPCH01M4/628H01M4/745H01M10/0525H01M10/0585Y02E60/10Y02P70/50
Inventor 黄碧英黄耀泽唐天文
Owner LONG POWER SYST NANTONG CO LTD
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