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A large-magnification high-power battery capacitor negative pole piece and preparation method thereof

A technology for battery capacitors and negative pole pieces, which is applied in the manufacture of battery electrodes, non-aqueous electrolyte battery electrodes, and hybrid/electric double-layer capacitors. and other problems, to achieve the effect of satisfying high current charging and discharging, improving energy density and improving electrical conductivity

Active Publication Date: 2019-07-26
NINGBO CRRC NEW ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high crystallinity and highly oriented layered structure of graphite, it is sensitive to electrolyte and has poor compatibility with solvents; in addition, graphite has low high-current charge and discharge capacity
At the same time, during the charge-discharge cycle, the distance between graphite layers changes greatly; and lithium and organic solvents are intercalated between graphite layers and organic solvents are decomposed, which may easily cause graphite layers to peel off gradually, and graphite particles to crack and pulverize. Thereby reducing the cycle life of graphite materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] In this embodiment, the large-magnification high-power battery capacitor negative pole piece includes a current collector and an electrode material coated on the entire area of ​​one side of the current collector: wherein the current collector is a corroded aluminum foil, and the corroded aluminum foil is all on one side of the surface. The area is obtained after corrosion; the electrode material is obtained by mixing and uniformly pressing the active material, conductive agent, and binder. The active material is graphite, carbon nanotubes, activated carbon, coke, mesophase carbon microspheres, hard carbon, and soft carbon. A composite material of one or a mixture of several. Use a diaphragm to separate the positive pole piece of the battery capacitor from the negative pole piece sample of this scheme to make a battery cell, dry it in a vacuum at 80°C for 24 hours, fill it with electrolyte in a glove box, and then package it in an aluminum-plastic film. After standing fo...

Embodiment 2

[0037] In this embodiment, the large-magnification high-power battery capacitor negative pole piece includes a current collector and electrode materials coated on the entire area on both sides of the current collector: wherein the current collector is a corroded aluminum foil, and the corroded aluminum foil is the two sides of the surface The whole area is corroded; the electrode material is obtained by mixing and pressing the active material, conductive agent, and binder uniformly. The active material is graphite, carbon nanotubes, activated carbon, coke, mesophase carbon microspheres, hard carbon, soft A composite material of one or a mixture of several types of carbon. Use a diaphragm to separate the positive pole piece of the battery capacitor from the negative pole piece sample of this scheme to make a battery cell, dry it in a vacuum at 80°C for 24 hours, fill it with electrolyte in a glove box, and then package it in an aluminum-plastic film. After standing for 12 hours,...

Embodiment 3

[0039] In this embodiment, the large-rate high-power battery capacitor negative pole piece includes a current collector and electrode materials coated on the middle and lower regions on both sides of the current collector (such as the lower two-thirds of the two sides of the region): wherein the current collector is The corroded aluminum foil is obtained after corroding the entire surface of one side and the middle and lower part of the other side (such as the lower two-thirds of the side); the electrode material will include active materials, conductive agents, adhesives, etc. The binder is obtained after being uniformly mixed and pressed, and the active material is a composite material of one or more mixtures of graphite, carbon nanotubes, activated carbon, coke, mesocarbon microspheres, hard carbon, and soft carbon. Use a diaphragm to separate the positive pole piece of the battery capacitor from the negative pole piece sample of this scheme to make a battery cell, dry it in...

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Abstract

The invention discloses a negative electrode plate of a high-rate and high-power battery capacitor. The negative electrode plate comprises a current collector and an electrode material coating at least one part of area of the current collector, wherein the current collector is a corrosive aluminum foil; the corrosive aluminum foil is obtained through corrosion of at least one part of area of the surface thereof; the electrode material is obtained by mixing an active material, a conductive agent and a binder evenly and pressing a mixture; and the active material is a composite material of one or a mixture of more of graphite, carbon nanotubes, activated carbon, coke, mesocarbon microbeads, hard carbon and soft carbon. The substances of the electrode material of an electrode disclosed by the invention are good in bondability and are not easy to strip, the service life is prolonged, the negative electrode plate has a relatively low potential platform and the average working voltage of a hybrid capacitor battery is higher than that of a traditional double electric layer capacitor, so that the energy density of a system is improved.

Description

technical field [0001] The invention relates to a battery capacitor electrode pole piece and a preparation method thereof, in particular to a large-magnification, long-life, high-power battery capacitor negative pole piece and a preparation method thereof. Background technique [0002] At present, the commonly used energy storage devices mainly include lithium-ion batteries and supercapacitors. Lithium-ion batteries have the characteristics of high energy density, but their cycle life is short and their power density is low. Although supercapacitors have high specific power and cycle life, their energy density is low, so It is urgent to develop a hybrid energy storage device with high power density and high energy density. [0003] Supercapacitor battery is a new type of energy storage device with high energy density and high power density. "The high-performance anode of the characteristic is significant. [0004] The anode materials of supercapacitor batteries are mainly ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/26H01G11/50H01G11/86H01M4/13H01M4/139
CPCH01G11/26H01G11/50H01G11/86H01M4/13H01M4/139Y02E60/10Y02E60/13
Inventor 阮殿波吴奕环郑超陈雪丹刘秋香
Owner NINGBO CRRC NEW ENERGY TECH CO LTD
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