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

Lithium-embedded electrode material, preparation method thereof, electrode, and battery

A lithium electrode and electrode technology, applied in the field of batteries, can solve problems such as potential safety hazards and poor industrial implementation, and achieve the effects of enhancing selectivity, increasing available lithium ions, and reducing irreversible capacity

Inactive Publication Date: 2015-02-25
POSITEC POWER TOOLS (SUZHOU) CO LTD +1
View PDF3 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is that, in the prior art, the method for increasing available lithium ions for lithium ion batteries has potential safety hazards and poor industrial implementation

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
  • Lithium-embedded electrode material, preparation method thereof, electrode, and battery

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0025] A method for preparing a lithium intercalation electrode material, comprising the following steps: rolling a carrier film with stabilized lithium metal powder onto the lithium electrode material to be intercalated, and then contacting the lithium electrode material to be intercalated with an electrolyte to stabilize the metal Lithium powder and the lithium electrode material to be intercalated constitute a micro-battery discharge.

[0026] Among them, the stabilized lithium metal powder (English: stabilized lithium powder, SLMP for short) is a product well known to those skilled in the art, which can be prepared by yourself or purchased from a store.

[0027] Stabilized metal lithium powder means that a passivation layer or a protective layer is attached to the surface of the metal lithium powder. The passivation layer or protective layer isolates the internal metal lithium powder from oxygen or moisture and reduces the activity of the metal lithium powder. Stabilized l...

Embodiment approach

[0061] In a preferred embodiment, the electrolytic solution of the present invention is an electrolytic solution used in lithium-ion batteries.

[0062] Among them, the contact method of the lithium electrode material to be intercalated and the electrolyte can be soaking the rolled lithium electrode material to be inserted in the electrolyte, or adding the electrolyte dropwise to the rolled lithium electrode material to be inserted. , so that the electrolyte fully infiltrates the rolled lithium electrode material to be intercalated.

[0063] Preferably, the contact time between the lithium electrode material to be intercalated and the electrolyte is 4 to 20 hours, which can ensure that the metal lithium and the lithium electrode material to be intercalated fully react, so that all lithium metal is converted into lithium ions and intercalated into the lithium electrode material to be intercalated to go.

[0064] More preferably, the electrolyte contact time is 12 hours.

[00...

Embodiment 1

[0082] Carrier film with stabilized lithium metal powder: the areal density of the stabilized lithium metal powder is 0.4mg / cm 2 , the carrier film is polypropylene InteTopp TM AA type film, area 50cm 2 .

[0083] Lithium electrode material to be intercalated: 50cm 2 Graphite flakes (weight 255mg).

[0084] Electrolyte: 1mol / L LiPF 6 / EC+DEC(1:1).

[0085] In a dry workshop with a water content lower than 50ppm, the carrier film with stabilized lithium metal powder and the lithium electrode material to be intercalated are placed on a rolling press for 10 7 Rolling under Pa, the stabilized metal lithium powder is transferred to the lithium electrode material to be intercalated, and then the carrier film is removed. The rolled lithium electrode material to be intercalated is then immersed in the electrolyte for 12 hours, and then dried to remove the electrolyte.

[0086] The obtained lithium intercalation electrode material is denoted as A1.

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
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention belongs to the field of battery, and specifically discloses a preparation method of a lithium-embedded electrode material. The preparation method comprises the following steps: rolling and pressing a carrier membrane, which is provided stabilized lithium powder on the surface, on an electrode material to be embedded with lithium, and then contacting the electrode material with electrolyte to make the stabilized lithium powder and the electrode material to carry out self-discharge. The invention further discloses a lithium-embedded electrode material obtained through the method mentioned above, and an electrode and battery containing the lithium-embedded electrode material. A carrier membrane provided with stabilized lithium powder is adopted to replace the conventional suspension liquid, which is prepared on site and is not easy for transportation and preservation.

Description

technical field [0001] The invention belongs to the field of batteries, and in particular relates to a preparation method of a lithium intercalation electrode material, a lithium intercalation electrode material, an electrode and a battery. Background technique [0002] At present, in lithium-ion batteries, the negative electrode materials are mostly carbon-based materials and silicon-based materials, and these materials cannot directly extract lithium ions; the capacity of lithium-ion batteries made of these materials basically depends on the lithium ions that can be provided by the positive electrode material. quantity. When the positive electrode material does not contain lithium or is short of lithium, the battery cannot be formed or the battery capacity is very low. Therefore, this greatly limits the selection of positive electrode materials. [0003] In addition, during the first charge and discharge process of a lithium-ion battery, an SEI film will be formed on the ...

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): H01M4/36H01M4/13H01M4/62
CPCH01M4/139H01M4/386H01M4/583H01M4/66H01M10/0525Y02E60/10
Inventor 陈璞陈渊
Owner POSITEC POWER TOOLS (SUZHOU) CO LTD