Super lithium ion battery capacitor

A technology for ion batteries and capacitors, which is applied in the direction of electrolytic capacitors, capacitors, double-layer capacitors, etc., can solve the problems of short life, narrow applicable voltage range, and low energy density of supercapacitor batteries, so as to prevent breakage, inhibit expansion, and achieve excellent electronic performance. The effect of conductivity

Pending Publication Date: 2020-04-28
HENGDIAN GRP DMEGC MAGNETICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problems of low energy density, short life and narrow applicable voltage range of supercapacitor batteries in the prior art

Method used

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  • Super lithium ion battery capacitor
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Examples

Experimental program
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Effect test

Embodiment 1

[0056] A 1520 type (diameter 15.0mm, height 20.0mm) cylindrical lithium-ion battery capacitor:

[0057] Positive plate: by 90wt% NCW90 (being 30nm by width, the particle diameter D50 that the thin rod-shaped primary particle that length is 0.5 μm is made up of is the secondary spherical aggregate material of 6 μ m, the sectional view of described secondary particle is as follows figure 1 shown), 5wt% activated carbon, 0.5wt% multi-walled carbon nanotube MWCNT and 4.5wt% polyvinylidene fluoride binder PVDF are mixed evenly, and N-methylpyrrolidone is used as solvent, stirred into a slurry, and coated on Made on 14μm aluminum foil;

[0058] Negative plate: 42wt% soft carbon, 53wt% artificial graphite, 2.0wt% carboxymethyl cellulose CMC, 2.9wt% soluble styrene-butadiene rubber binder SBR, and 0.1wt% single-walled carbon nanotube SWNCT are mixed uniformly to Deionized water is used as a solvent, stirred into a slurry, and coated on a 10μm copper foil;

[0059] Cell: the positive...

Embodiment 2

[0062] A 1520 type (diameter 15.0mm, height 20.0mm) cylindrical lithium-ion battery capacitor:

[0063]Positive plate: by 80wt% NCW90 (being 50nm by width, the particle diameter D50 that the thin rod-shaped primary particle that length is 0.4 μm is formed is the secondary spherical aggregate material of 4 μm), 12wt% activated carbon, 1wt% multi-walled carbon nanotube MWCNT and 7wt% polyvinylidene fluoride binder PVDF are evenly mixed, and N-methylpyrrolidone is used as a solvent, stirred into a slurry, and coated on a 14 μm aluminum foil;

[0064] Negative plate: 46wt% soft carbon, 50wt% artificial graphite, 1.5wt% carboxymethyl cellulose CMC, 2.0wt% soluble styrene-butadiene rubber binder SBR, and 0.5wt% single-walled carbon nanotube SWNCT are mixed uniformly to Deionized water is used as a solvent, stirred into a slurry, and coated on a 10μm copper foil;

[0065] Cell: the positive and negative pole pieces are separated by PP / PE / PP three-layer microporous film and wound to ...

Embodiment 3

[0068] A 1520 type (diameter 15.0mm, height 20.0mm) cylindrical lithium-ion battery capacitor:

[0069] Positive plate: by 85wt% NCW90 (by the width is 90nm, the particle size D50 that the thin rod-shaped primary particle that length is 0.8 μm is formed is the secondary spherical aggregate material of 8 μm), 10wt% activated carbon, 0.7wt% multi-walled carbon nano Tube MWCNT and 4.3wt% polyvinylidene fluoride binder PVDF are evenly mixed, and N-methylpyrrolidone is used as a solvent, stirred into a slurry, and coated on a 14 μm aluminum foil;

[0070] Negative plate: 45wt% soft carbon, 50wt% artificial graphite, 1.7wt% carboxymethyl cellulose CMC, 2.8wt% soluble styrene-butadiene rubber binder SBR, and 0.5wt% single-walled carbon nanotube SWNCT are mixed uniformly to Deionized water is used as a solvent, stirred into a slurry, and coated on a 10μm copper foil;

[0071] Cell: the positive and negative pole pieces are separated by PP / PE / PP three-layer microporous film and wound ...

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Abstract

The invention discloses a super lithium ion battery capacitor. The super lithium ion battery capacitor comprises a capacitor shell, an organic electrolyte located in the capacitor shell, and a batterycell formed by a positive plate, a negative plate and a diaphragm, wherein the positive plate comprises LiNi0.9Co0.09W0.01O2; and the negative plate comprises soft carbon and an artificial graphite material. In view of the problems of low energy density, short service life and narrow applicable voltage range of a super capacitor battery in the prior art, the lithium ion battery capacitor disclosed by the invention has the advantages of high energy density, long service life, strong high-current charge-discharge capacity, wider use temperature range and voltage range, extremely low leakage current (self-discharge rate), and very excellent voltage (charge) retention rate and capacity retention rate.

Description

technical field [0001] The invention belongs to the technical field of chemical power sources, and in particular relates to a super lithium ion battery capacitor. Background technique [0002] With the rapid development of informatization and intelligence, the society has higher and higher requirements on the energy density and output power of storage devices, and lithium-ion batteries and capacitors have become current research hotspots. Lithium-ion batteries have the advantages of high energy density and low self-discharge rate, but the rate performance is not ideal, the power density is low, and the voltage range of lithium-ion batteries is between 2.5V and 4.2V. When it is higher than 4.2V, the positive electrode of the battery The material and electrolyte are unstable and easy to oxidize, and lithium is easily precipitated on the surface of the negative electrode to form lithium dendrites, which brings potential safety hazards. Although capacitors have the advantages o...

Claims

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Application Information

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IPC IPC(8): H01G11/06H01G11/32H01G11/46H01G11/58H01G11/60H01G11/62H01G11/64
CPCH01G11/06H01G11/32H01G11/46H01G11/58H01G11/60H01G11/62H01G11/64Y02E60/13
Inventor 王国光蒋易晟王占洲石程
Owner HENGDIAN GRP DMEGC MAGNETICS CO LTD
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