Protective film, separator using same, and secondary battery

A technology of rechargeable battery and protective film, applied in the field of protective film for protecting lithium-containing anodes, can solve the problems such as the specific method for the mobile growth of lithium ions that is not recorded.

Active Publication Date: 2016-07-20
W L GORE & ASSOC GK
View PDF9 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it does not describe the movement of lithium ions and a specific method for preventing the growth of lithium dendrites accompanying the movement.

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
  • Protective film, separator using same, and secondary battery
  • Protective film, separator using same, and secondary battery
  • Protective film, separator using same, and secondary battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0107] Hereinafter, the present invention will be described concretely with reference to examples, but the present invention is not limited thereto.

[0108] In this example, various protective films were produced under the conditions shown in Table 1, and coin batteries were produced using these protective films. The total resistance (Ω) of the protective film and the spacer was measured, and a charge-discharge test of a coin cell (Li / Li coin cell cycle) was performed. The charge-discharge test measures the average charge-discharge efficiency and the number of cycles until Li dendrites cause an internal short circuit, and evaluates the lifetime of each coin cell. Hereinafter, it demonstrates in more detail.

[0109] 【Table 1】

[0110]

[0111] As the reinforcement layer (porous polymer membrane) constituting the protective membrane, a PTFE membrane [manufactured by Nippon Gore Co., Ltd.], which is a membrane composed of a tetrafluoroethylene (TFE) polymer or copolymer, wa...

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
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
Login to view more

Abstract

The purpose of the invention is to provide: an anode protective film which is capable of reliably suppressing dendrite growth that may occur on an anode; a separator which uses this anode protective film; and a secondary battery. A protective film for protecting an anode that contains lithium, which is composed of a polymer porous film and a polymer material that has lithium ion conductivity by itself, and which is characterized in that at least one surface of the polymer porous film is covered with the polymer material that has lithium ion conductivity.

Description

technical field [0001] The present invention relates to a protective film, a separator using the protective film, and a rechargeable battery. In particular, it relates to a protective film for protecting lithium-containing anodes, a separator using the protective film, and a rechargeable battery. Background technique [0002] In recent years, portable wireless products such as CD players, multimedia players, mobile phones, smartphones, notebook PCs, tablet devices, and video cameras have become smaller and more portable. In addition, from the viewpoint of environmental problems such as air pollution and increase in carbon dioxide, the development of hybrid vehicles and electric vehicles has been recommended and is in the stage of practical use. In these electronic devices, electric vehicles, and the like, excellent rechargeable batteries featuring high efficiency, high output, high energy density, light weight, and the like are required. As secondary batteries having the a...

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): H01M2/16H01M4/13H01M10/052H01M50/403H01M50/414H01M50/451H01M50/457H01M50/489H01M50/491
CPCH01M10/052H01M4/134H01M50/403H01M50/451H01M50/457H01M50/491H01M50/414H01M50/489Y02E60/10H01M10/4235H01M2220/20H01M2220/30
Inventor 小林康太郎
Owner W L GORE & ASSOC GK
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