Unlock instant, AI-driven research and patent intelligence for your innovation.

Multilayer graphene and power storage device

A multi-layer graphene and electricity storage device technology, applied in the direction of circuits, electrical components, battery electrodes, etc., can solve problems such as easy damage, electrode deformation, and decrease in discharge capacity of active material layers, so as to improve discharge capacity and improve reliability. The effect of resistance and durability

Active Publication Date: 2012-12-26
SEMICON ENERGY LAB CO LTD
View PDF2 Cites 6 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In existing electrodes, the active material layer includes a conductive aid, a binder, etc. in addition to the active material, which cause a decrease in the discharge capacity per unit weight of the active material layer.
Furthermore, the binder included in the active material layer will swell when in contact with the electrolyte, resulting in deformation of the electrode and easy damage.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Multilayer graphene and power storage device
  • Multilayer graphene and power storage device
  • Multilayer graphene and power storage device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0098] In this embodiment, refer to Figure 1A to Figure 1C The structure and production method of multilayer graphene will be described.

[0099] Figure 1A A schematic cross-sectional view of multilayer graphene 101 is shown. In the multilayer graphene 101, a plurality of graphenes 103 are stacked substantially in parallel. Here, the interlayer distance 105 between graphenes is greater than 0.34 nm and not more than 0.5 nm, preferably not less than 0.38 nm and not more than 0.42 nm, more preferably not less than 0.39 nm and not more than 0.41 nm. In addition, the multilayer graphene 101 includes graphene 103 having two or more layers and not more than one hundred layers.

[0100] Figure 1B show Figure 1A A perspective view of graphene 103 is shown. Graphene 103 is in the form of a thin film with one side length of several μm, and there are gaps 107 in some places. This gap 107 serves as a passage through which ions can move. Thus, in Figure 1A In the multilayer gr...

Embodiment approach 2

[0115] In this embodiment, the structure and manufacturing method of electrodes of an electricity storage device will be described.

[0116] First, the negative electrode and its manufacturing method will be described.

[0117] Figure 2A is a cross-sectional view of the negative electrode 205 . In the negative electrode 205 , a negative electrode active material layer 203 is formed on the negative electrode current collector 201 .

[0118] In addition, an active material refers to a material related to the intercalation and deintercalation of ions as carriers. Therefore, the active material is distinguished from the active material layer.

[0119] High conductivity materials such as copper, stainless steel, iron, and nickel can be used for the negative electrode current collector 201 . In addition, the shape of the negative electrode current collector 201 may suitably take a foil shape, a plate shape, a mesh shape, or the like.

[0120]As the negative electrode active ma...

Embodiment approach 3

[0161] In this embodiment, a method of manufacturing an electricity storage device will be described.

[0162] refer to Figure 4 One form of a lithium ion secondary battery that is a typical example of the power storage device according to this embodiment will be described. Here, the cross-sectional structure of the lithium ion secondary battery will be described below.

[0163] Figure 4 is a cross-sectional view showing a lithium ion secondary battery.

[0164] The lithium-ion secondary battery 400 includes: a negative electrode 411 made of a negative electrode current collector 407 and a negative electrode active material layer 409; a positive electrode 405 made of a positive electrode current collector 401 and a positive electrode active material layer 403; The isolator 413. In addition, the separator 413 contains an electrolyte 415 . In addition, the negative electrode collector 407 is connected to the external terminal 419 , and the positive electrode current colle...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
particle diameteraaaaaaaaaa
diameteraaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

Provided is graphene through which ions can transfer in the direction perpendicular to a plane of the graphene. Multilayer graphene includes a plurality of graphenes stacked in a layered manner. The plurality of graphenes contain a six-membered ring composed of carbon atoms, a poly-membered ring which is a seven or more-membered ring composed of carbon atoms or carbon atoms and one or more oxygen atoms, and an oxygen atom bonded to one of the carbon atoms in the six-membered ring and the poly-membered ring, which is a seven or more-membered ring. The interlayer distance between adjacent graphenes of the plurality of graphenes is greater than 0.34 nm and less than or equal to 0.5 nm, preferably greater than or equal to 0.38 nm and less than or equal to 0.42 nm.

Description

technical field [0001] The invention relates to a multilayer graphene, an electrical storage device and a semiconductor device having the multilayer graphene. Background technique [0002] In recent years, graphene has been considered as an electronic member having conductivity in semiconductor devices. Graphene refers to the horizontal layer in graphite, that is, the carbon layer composed of six-membered rings composed of carbon atoms connected in the plane direction, especially when the carbon layer with more than two layers and less than one hundred layers is stacked, it is called multilayer. layers of graphene. [0003] Since graphene has chemical stability and good electrical characteristics, it is expected to be applied to channel regions, via holes, wiring lines, etc. of transistors included in semiconductor devices. [0004] In addition, in Patent Document 1, in order to improve the conductivity of an electrode material of a lithium ion battery, graphene is covered...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04H01M4/62
CPCY02E60/12H01M4/625C01B31/04H01M4/62C01B31/0476B82Y30/00B82Y40/00C01P2004/04C01P2004/03C01B32/192Y10T428/249921Y02E60/10
Inventor 小国哲平等等力弘笃长多刚
Owner SEMICON ENERGY LAB CO LTD