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Novel lithium pre-embedding method of lithium ion capacitor

A technology for capacitors and pre-intercalation of lithium, which is used in capacitors, capacitor manufacturing, hybrid capacitors, etc., can solve the problems of high production cost of pre-intercalated lithium, great safety hazards, and complicated processes, and achieves improved effects, improved safety, and simplified processes. The effect of the process

Active Publication Date: 2015-06-03
NINGBO CRRC NEW ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problems of high production cost, great potential safety hazards and complex process of pre-intercalation lithium in lithium ion capacitors, we propose a new pre-intercalation lithium method for lithium ion capacitors. The invention can effectively solve the problem of lithium metal, porous current collectors, etc. The problem of high cost caused by it can improve safety and simplify the process, which is suitable for industrial production

Method used

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  • Novel lithium pre-embedding method of lithium ion capacitor
  • Novel lithium pre-embedding method of lithium ion capacitor
  • Novel lithium pre-embedding method of lithium ion capacitor

Examples

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Effect test

Embodiment 1

[0030] A manufacturing method of a lithium ion capacitor, the steps are as follows:

[0031] (1) The slurry with activated carbon as the active material is attached to non-porous aluminum foil as the positive electrode, and the slurry with mesocarbon microspheres as the active material is attached to the non-porous copper foil as the negative electrode. PP / PE / PP three-layer polymer For the diaphragm, stack the sheets according to the diaphragm, negative electrode, diaphragm, and positive electrode to form a battery cell, and fix it with tape, and weld the positive electrode current collector and negative electrode current collector to the positive and negative electrode lugs or lead-out terminals respectively;

[0032] (2) After drying, immerse the cell in a beaker filled with LiPF6-EC / PC / DEC solution;

[0033] (3) Connect the positive and negative poles of the charge-discharge tester to the positive and negative poles respectively, charge to 3.8V with a constant current equiv...

Embodiment 2

[0036] A manufacturing method of a lithium ion capacitor, the steps are as follows:

[0037] (1) The slurry with activated carbon as the active material is attached to the non-porous aluminum foil as the positive electrode, the slurry with artificial graphite as the active material is attached to the non-porous copper foil as the negative electrode, and the PP / PE / PP three-layer polymer is used as the diaphragm, According to the way of diaphragm, negative electrode, diaphragm and positive electrode, stack the sheets into a cell, and fix it with tape, and weld the positive electrode current collector and negative electrode current collector to the positive and negative electrode lugs or lead-out terminals respectively;

[0038] (2) After drying, immerse the cell into a beaker filled with LiBF4-PC / DMF solution;

[0039] (3) Use the positive and negative poles of the charge-discharge tester to connect the positive pole and the negative pole respectively, charge it with a constant ...

Embodiment 3

[0042]A manufacturing method of a lithium ion capacitor, the steps are as follows:

[0043] (1) The slurry with activated carbon as the active material is attached to the porous aluminum foil as the positive electrode, the slurry with the hard carbon as the active material is attached to the porous copper foil as the negative electrode, and the single-layer PP polymer film is used as the separator. According to the separator, negative electrode, The diaphragm and the positive electrode are wound into a cell and fixed with adhesive tape, and the positive and negative current collectors are welded to the positive and negative tabs or lead-out terminals respectively;

[0044] (2) After drying, immerse the cell in Li 2 CO 3 in a beaker of organic solution;

[0045] (3) Use the positive and negative poles of the charge-discharge tester to connect the positive pole and the negative pole respectively, charge it with a constant current equivalent to 0.2C to 3.8V, then disconnect the...

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Abstract

The invention provides a novel lithium pre-embedding method of a lithium ion capacitor. The method comprises the following steps that (1) a battery cell is assembled, and is soaked into an organic solution containing lithium salts; (2) a positive electrode and a negative electrode are respectively connected with a charging and discharging test instrument, and once discharging after once charging is used as a cycle, 1 to 1000 times of cycles are totally carried out, and the lithium pre-embedding on the negative electrode is completed; (3) the battery cell after the lithium pre-embedding completion is taken out and is put into a packaging case, the packaging case is filled with electrolyte and is assembled into a lithium ion capacitor single body. When the method is adopted, the problem of too high cost due to lithium metal, porous current collectors and the like can be effectively solved, the safety can be improved, the technical flow process can be simplified, and the method is applicable to industrial production.

Description

technical field [0001] The invention relates to the field of lithium ion capacitors, in particular to a novel pre-embedded lithium method for lithium ion capacitors. Background technique [0002] Lithium-ion capacitors are a new type of typical hybrid energy storage device that combines lithium-ion batteries and electric double-layer supercapacitors. It has the advantages of high specific energy of lithium-ion capacitors and high specific power and long life of supercapacitors. It is widely used in military and aerospace industries. , green energy and other fields have broad application prospects. At present, the pre-embedded lithium method of lithium-ion capacitors generally adopts the method in Fuji Heavy Industries' invention patent CN101138058B, that is, lithium metal is used as a lithium source, and a metal foil with a through hole is used as a current collector, and the lithium metal is placed in a position opposite to the negative electrode. Short-circuit the lithium...

Claims

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Application Information

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IPC IPC(8): H01G13/00
CPCH01G11/06H01G11/14H01G11/50H01G11/60H01G11/62H01M4/133H01M10/0525Y02E60/13Y02E60/10H01M50/4295H01M50/44H01G11/32
Inventor 阮殿波曾福娣傅冠生
Owner NINGBO CRRC NEW ENERGY TECH CO LTD
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