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Nonwoven fabrics, fibre and electrochemistry single cell

A non-woven fabric, electrochemical technology, applied in the field of non-woven fabrics, to achieve the effect of high unit surface area and high uniformity

Inactive Publication Date: 2006-08-16
CARL FREUDENBERG KG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] Accordingly, nonwovens of the type described have significant disadvantages both in their manufacture and in their subsequent use.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0042] A) Ammonia-bonded polyolefin fibers are produced illustratively as follows:

[0043] 1. A polypropylene with 5.5% AS content grafted with acrylic acid was used.

[0044] The spinning of fibers was carried out at an extruder temperature of 210-215°C. Spinneret - orifice diameter 450 μm. Polymer throughput per nozzle is 0.11cm 3 / min. The fibers were then elongated 3-fold at temperatures of 80 and 100°C. The fibers formed had a titer of approximately 2.5 dtex. The ammonia absorption capacity is 0.58 mmol NH3 / g.

[0045] 2. Use of a polyethylene grafted with acrylic acid with 6% AS content.

[0046] The spinning of fibers was carried out at an extruder temperature of 205-210°C. Spinneret - orifice diameter 450 μm. Polymer throughput per nozzle is 0.13cm 3 / min. The fibers were then elongated 3-fold at temperatures of 80 and 100°C. The fibers formed likewise have a titer of approximately 3 dtex. The ammonia absorption capacity is 0.51 mmol NH3 / g.

[0047] 3. Us...

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Abstract

A fleece material, especially as a separator in electrochemical cells and batteries comprises functional fibers of at least one fiber material with intrinsic material that is chemically active or can be activated in alkaline media. The material is incorporated into surface regions of the fiber volumes that are effective in contact with the medium. Independent claims are also included for the following: (A) A fiber as above;and (B) Electrochemical cells, especially batteries having a separator as above

Description

technical field [0001] The present invention relates to a nonwoven fabric, in particular for use as a separator for batteries or electrochemical cells, comprising functional (funktionell) fibers made of at least one fiber material which itself comprises at least one A chemically active or activatable material in an alkaline medium. Furthermore, the invention relates to a fiber comprising a fiber material which itself comprises at least one substance which is chemically active or activatable in an alkaline medium. Finally the invention relates to an electrochemical cell, in particular a battery, with a housing, wherein the housing at least partially accommodates at least one positive electrode and one negative electrode and a material which allows the transport of charge carriers, and Wherein, a separator separates the positive and negative electrodes, and here, the separator includes a non-woven fabric or at least one fiber. Background technique [0002] Alkaline batteries...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D04H1/02D01F6/04H01M2/16D04H1/4291D04H1/54D04H1/541D04H1/544D04H3/007D04H3/147D04H3/16H01M50/417H01M50/489
CPCY02E60/12H01M2/162D04H1/54D04H1/544D04H3/007H01M10/30D04H3/147D04H3/16H01M10/345H01M10/4235Y02E60/124D04H1/541D04H1/4291Y10T442/681Y10T442/638Y10T442/696Y10T442/68Y10T442/641Y10T442/637Y10T442/66Y02E60/10H01M50/44D04H1/5412D04H1/5418D04H1/5414H01M50/417H01M50/489
Inventor P·克里策H-J·法伊斯特纳H·席林M·卡尔贝
Owner CARL FREUDENBERG KG