Method for continuously preparing current collector-free silicon-carbon negative electrode paper

A technology of negative electrode and current collector, applied in the field of battery silicon carbon electrode material preparation, can solve problems such as difficulty in large-scale continuous production, and achieve the effects of ensuring continuity, reducing energy consumption and production cost, and reducing battery weight

Pending Publication Date: 2020-08-11
SICHUAN JUCHUANG SHIMOXI TECH CO LTD
View PDF35 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to improve the shortcomings of large-scale continuous production difficulties in the prior art, and provi

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
  • Method for continuously preparing current collector-free silicon-carbon negative electrode paper
  • Method for continuously preparing current collector-free silicon-carbon negative electrode paper

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0028] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. The components of the embodiments of the present invention generally described and illustrated in the drawings herein may be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work shall fall within the protection scope of the present invention.

[0029] Be...

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 relates to a method for continuously preparing current collector-free silicon-carbon negative electrode paper, which comprises the following steps: a mixing step: injecting expanded graphite, an auxiliary carbon source and a silicon source into a mixing bin, and mixing to obtain a mixture; a rolling step: injecting the mixed material into a forming cabin, and performing rolling treatment on the mixed material through a rolling device to prepare sheet-shaped silicon-carbon composite electrode paper; and a purification step: transferring the silicon-carbon paper composite electrodepaper into a purification cabin, and removing impurities in the silicon-carbon paper composite electrode paper by adopting a high-temperature and low-pressure purification technology to obtain the current collector-free silicon-carbon negative electrode paper. According to the method, the silicon-carbon negative electrode without the current collector can be prepared, large-scale and continuous production can be realized, and the production efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of preparation of battery silicon-carbon electrode materials, in particular to a method for continuously preparing collector-free silicon-carbon negative electrode paper. Background technique [0002] Lithium-ion batteries have long cycle life, high power density, low self-discharge rate and are environmentally friendly, so they are often used as power batteries for new energy vehicles. Graphitized carbon material is the most commonly used negative electrode material for commercial lithium-ion batteries. It has good conductivity and stable cycle, but its theoretical specific capacity is small, which greatly limits the replacement of batteries. Silicon-based negative electrode materials have a high theoretical specific capacity, so silicon-carbon composite materials are currently used to prepare silicon-carbon negative electrodes. However, the currently prepared negative electrode not only has silicon-carbon...

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
IPC IPC(8): H01M4/36H01M4/38H01M4/583H01M10/0525
CPCH01M4/364H01M4/386H01M4/583H01M10/0525H01M2004/027Y02E60/10
Inventor 王志强陈晔陈茜卫英杰刘长虹单艾娴
Owner SICHUAN JUCHUANG SHIMOXI TECH CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap