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A polar1zable ion-conducting material

A technology of conductive materials and polarized ions, applied in circuits, capacitors, fuel cells, etc., can solve problems such as difficult amplification and expensive double-layer capacitors

Inactive Publication Date: 2014-04-09
NAT UNIV OF SINGAPORE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, double layer capacitors are expensive and not easy to scale up

Method used

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  • A polar1zable ion-conducting material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Fabrication of Poly(4-Lithium Styrene Sulfonate) Membranes

[0024] Polarizable ion-conducting membranes were fabricated following the procedures described in Xie et al., Energy & Environmental Science, 4, 3960-65 (2011); and Xie et al., Advanced Materials, 24, 76-81 (2012).

[0025] A solution of poly(4-lithium styrenesulfonate) in water (300 g / L) was cast onto the substrate to form a film with a thickness of 0.1 mm. After drying it in air, the film was peeled off from the substrate. Cut the flexible and foldable membrane into small pieces.

[0026] Assembly and testing of graphite / membrane / graphite devices

[0027] Devices were assembled from the 1.0 cm x 1.0 cm x 0.1 mm film by sandwiching the film between two sheets of graphite electrodes. The device was placed in a device holder consisting of a hollow cube (made of insulating plastic) and two aluminum plates. By being fastened up to 700kg / cm 2 The pressure screws are used to mount the device between two alu...

Embodiment 2

[0043] Fabrication of poly(4-sodium styrenesulfonate) membrane

[0044] Following the procedure described in Example 1, a poly(4-sodium styrenesulfonate) membrane with a thickness of 0.1 mm was produced.

[0045] Assembly and testing of graphite / membrane / graphite devices

[0046] Following the procedure described in Example 1, devices were assembled and subjected to charge-discharge tests at a constant voltage of 6V and a constant resistance of 1.2kΩ, 5.3kΩ, or 8.0kΩ. The average open circuit voltage of the poly(4-sodium styrenesulfonate) film was found to be 2.7V.

Embodiment 3

[0048] Fabrication of poly(4-styrenesulfonic acid) membranes

[0049] Following the procedure described in Example 1, a poly(4-styrenesulfonic acid) film with a thickness of 0.1 mm was produced.

[0050] Assembly and testing of graphite / membrane / graphite devices

[0051] Following the procedure described in Example 1, devices were assembled and subjected to charge-discharge tests at a constant voltage of 6V and a constant resistance of 1.2kΩ, 5.3kΩ, or 8.0kΩ. The average open circuit voltage of the poly(4-styrenesulfonic acid) membrane was found to be 1.3V.

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Abstract

The invention provides a polarizable ion-conducting material. The material contains mobile ions and a matrix formed of a polymer having ionic groups of a charge opposite to that of the mobile ions, wherein the material has a polarization of at least 0.2 mC / g, a capacitance of at least 0.1 mF / g, and a polarization retention time of at least 5 seconds. Also disclosed is a device containing such a polarizable ion-conducting material.

Description

Background technique [0001] Polarizable devices have a wide range of applications, such as energy storage, data storage, and electrical switching. Among the commonly used polarizable devices are dielectric capacitors and double layer capacitors. [0002] Dielectric capacitors have low capacitance, e.g. 0.1µF / cm 2 to 1μF / cm 2 . Thus, their applications are very limited. On the other hand, double-layer capacitors, which store charge in their two electrode layers, have a larger capacitance, say 0.5 μF / cm 2 to 5.0μF / cm 2 . However, double layer capacitors are expensive and not easy to scale up. [0003] There is a need to develop scalable and inexpensive polarizable ionically conductive materials. Contents of the invention [0004] An inexpensive and scalable polarizable ionically conductive material is disclosed herein. [0005] The polarizable ionically conductive material includes mobile ions and a matrix formed from a polymer having ionic groups of opposite charge t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/04H01G9/02C08J5/00
CPCY02E60/12Y02E60/521C08J2333/26H01G11/04H01M8/1067C08J5/22C08J5/2231H01M10/0565C08J2339/02H01M8/1018H01G11/56Y02E60/13H01M2300/0082Y02E60/10Y02E60/50Y02P70/50
Inventor 谢贤宁
Owner NAT UNIV OF SINGAPORE
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