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Electrically conductive freestanding microporous polymer sheet

A technology of microporous polymers and polymers, applied in circuits, capacitors, primary batteries, etc., can solve the problems that the application of porous membrane electrodes has not been realized.

Inactive Publication Date: 2002-03-20
AMTEK RES INT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Although UHMWPE is an integral part of separator technology, its application in the extrusion and extraction of free-standing conductive porous membrane electrodes has never been realized.

Method used

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  • Electrically conductive freestanding microporous polymer sheet
  • Electrically conductive freestanding microporous polymer sheet
  • Electrically conductive freestanding microporous polymer sheet

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1: preparation zinc-containing plate

[0028] UHMWPE (1900 HCM; Montell Polyolefin, 2.1 g) was added to zinc powder (particle size TM 3681 Process Oil (Shell Oil Co., 9.2 g). The oily mixture was stirred until a free flowing state was obtained, then the mixture was placed in a HAAKE Rheomix 600 small intensive mixer equipped with roller blades and driven by a HAAKE Rheocord 90 torque Rheometer, rotating at 80 RPM and set at 180 ℃. Additional process oil (8.0 g) was added to the mixing chamber. The resulting mixture was mixed for 5 minutes to obtain a homogeneous cohesive mass. This material was transferred to a C.W. Brabender PrepMill Model PM-300, two roll mill, rotating at 15 rpm and set at 150°C. The roll gap was adjusted to about 0.7 mm and the resulting polymer sheet was removed from the roll with a take-off knife.

[0029] The plate was cooled to room temperature and then a 40 mm x 60 mm sample was cut from the plate with a doctor blade...

Embodiment 2

[0038] Embodiment 2: Preparation of nickel-containing plate

[0039] UHMWPE (1900 HCM; Montell Polyolefin, 2.64 g) was added to nickel powder (3 μm particle size; Aldrich Chemical Co., 56.0 g) placed in a 250 ml plastic beaker. Mix the powder with a spatula until a homogeneous mixture is formed, at which point ShellFlex TM 3681 Process Oil (Shell Oil Co., 12.0 g). The oily mixture was stirred until a free flowing state was obtained, then the mixture was placed in a HAAKE Rheomix 600 small intensive mixer with roller blades driven by a HAAKE Rheocord 90 torque Rheometer, rotating at 80 RPM and set at 180 ℃. Additional process oil (8.0 g) was added to the mixing chamber. The resulting mixture was mixed for 5 minutes to obtain a homogeneous cohesive mass. This material was transferred to a C.W. Brabender Prep-Mill Model PM-300, two roll mill, rotating at 15 rpm and set at 150°C. The roll gap was adjusted to about 0.4 mm and the resulting polymer sheet was r...

Embodiment 3

[0042] Embodiment 3: prepare graphite-containing plate

[0043] UHMWPE (1900 HCM; Montell polyolefin, 10.0 g) and conductive carbon black (Super P; MMM carbon, 5.0 g) were added to graphite powder (BG-35; Superior Graphite Co., 85.0 g) placed in a 250 ml plastic beaker. g). The powder is mixed using a spatula until a homogeneous mixture is formed, at which point ShellFlex TM 3681 Process Oil (Shell Oil Co., 20.0 g). The oily mixture was stirred until a free flowing state was obtained, then the mixture was placed in a HAAKE Rheomix 600 small intensive mixer equipped with roller blades and driven by a HAAKERheocord 90 torque Rheometer, rotating at 80 RPM and set at 180°C. Additional process oil (80.0 g) was added to the mixing chamber. The resulting mixture was mixed for 5 minutes to obtain a homogeneous cohesive mass. This material was transferred to a C.W. Brabender Prep-Mill Model PM-300, two roll mill, rotating at 15 rpm and set at 150°C. The roll gap was...

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Abstract

A freestanding, microporous polymer sheet (52, 56) is composed of a polymer matrix binding an electrically conductive matrix. The polymer matrix preferably includes UHMWPE, and the electrically conductive matrix is preferably in powder form. The UHMWPE is of a molecular weight that provides sufficient molecular chain entanglement to form a sheet with freestanding characteristics. Multiple microporous sheets (30) can be wound or stacked in a package filled with an electrolyte to function as electrodes in an energy storage device (86), such as a battery. Metallic layers (81, 83) can be applied to the microporous sheets to function as current collectors in such devices.

Description

technical field [0001] The present invention relates to the formation of electrically conductive free-standing microporous polymer sheets, and more particularly to sheets for use in the manufacture of energy storage devices and other suitable devices. Background of the invention [0002] The following background information is given with reference to the example of electrode fabrication for use in energy storage devices. A detailed description of the construction details of the energy storage device of the present invention is in David Linden (Editor-in-Chief), Handbook of Batteries (Handbook of Batteries), 2 nd ed., McGraw-Hill, Inc. (1995). Electrode preparation for many energy storage devices begins by forming a slurry containing the electrochemically active material in powder form, the fluoropolymer, and the solvent. The slurry is coated onto a metal foil that acts as a current collector. The metal foil coated with the electrochemically active material is then passed...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K3/04B29C47/04B29K23/00B29K27/12B29K105/04B29L7/00B29L9/00B29L31/34C08K3/12C08K3/22C08L23/06C08L27/16C08L35/04C08L71/02H01B1/20H01G9/00H01G9/04H01G9/042H01G9/155H01M4/00H01M4/02H01M4/04H01M4/13H01M4/134H01M4/139H01M4/50H01M4/505H01M4/52H01M4/56H01M4/58H01M4/587H01M4/62H01M4/66H01M4/80H01M4/86H01M4/96H01M6/02H01M6/10H01M6/18H01M6/40H01M10/04H01M10/0525H01M10/06H01M10/24H01M10/34H01M10/36H01M50/417H01M50/491H01M50/494
CPCH01M4/587H01M4/96H01M10/345H01M4/622H01M10/0436H01M10/24H01M4/134Y02E60/13H01M4/00H01M6/10H01M4/505H01M4/8647H01M4/50H01M4/52H01M4/661H01M4/13H01M10/04H01M4/56H01M2300/0085H01M4/139H01G9/155Y02E60/122H01M10/0525H01M10/06H01M6/188H01M4/623H01G9/042H01M2300/0082H01M4/04H01M2/1653Y02E60/50H01M4/02H01M2/1673H01M6/40Y10T29/49114Y10T29/49112H01M50/46H01G11/38H01G11/86H01G11/52H01M50/417H01M50/491H01M50/494H01M10/0565H01M10/058
Inventor J·伊曼纽尔J·杨R·W·派卡拉
Owner AMTEK RES INT
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