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Mesoporous network electrode for electrochemical cell

An electrochemical and electrode technology, applied in the field of electrochemical cells, can solve problems such as limiting application fields

Inactive Publication Date: 2007-08-01
XOLIOX SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

While the performance advantages of lithium insertion batteries using mesoporous electrode morphologies have been recognized in these earlier published sources, the preparation and definition of electroactive thin films capable of sustaining electronic charge transport during charging can only be applied to rigid The high-temperature sintering step involved in the rigid sintering interconnection between nanoparticles of supports has limited their application fields

Method used

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  • Mesoporous network electrode for electrochemical cell
  • Mesoporous network electrode for electrochemical cell
  • Mesoporous network electrode for electrochemical cell

Examples

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preparation example Construction

[0077] During the casting mix preparation step, the nanoparticles are mixed with a volatile carrier that does not dissolve the linking polymer or dye. Examples of such carriers are water, dibutyl phthalate, dioctyl phthalate, and acetates, ethylene carbonate, octene carbonate, tributyl phosphate, decalinone, diethylene glycol Such mixing of methyl ether and low molecular weight polymer is necessary to obtain a composition with the desired rheological properties. Finally, the composition is cooled or heated to form a coatable material. Those skilled in the art will appreciate that certain adjustments to the viscosity and rheological properties of the solution may be necessary to suit the particular technique employed, which can be achieved by varying the molecular weight and / or concentration of the carrier. adjustment.

[0078] In the casting step, the discrete particles can be cast on a suitable substrate (such as a metal or transparent conductive oxide electrode) by any atta...

example 1

[0095] Example 1 Preparation of aqueous titanium dioxide dispersion

[0096] 24.5 g of nanocrystalline TiO were purchased from FranKfurt am Main, Germany; Degussa-Huls AG; 2 (P-25, mainly anatase), dispersed it in 170 g of deionized water at 40°C, and then placed the mixture under ultrasonic waves for several minutes. Next, the pH of the dispersion was adjusted to 4.5 by adding an aliquot of 1% by weight KOH in water. Repeat the sonication and add more water to reach a final weight of 200g. Thus, the prepared dispersion contained 12.5% ​​by weight of TiO 2 .

example 2

[0097] Example 2 Preparation of pastes for use as coating solutions

[0098] 65.04 g of the dispersion prepared as described in Example 1 were mixed with 7.2 g of deionized water at a temperature of 40°C. A 7.5% by weight aqueous solution of polyethylene glycol (average molecular weight 100,000, purchased from Frank Chemical Industries, Bachs, Switzerland) was added, and then the total weight of the solution was brought up to 80 g by adding water. Finally the solution was homogenized by sonication.

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Abstract

A high kinetics rate electrochemical cell in which at least one of the electrodes is composed of a mesostructural electroactive material comprising nanoparticles forming a three-dimensional framework structure of mesoporous texture having a bicontinuous junction of large specific surface area with the electrolyte. A low temperature method of preparation of the electrodes employs a high-speed deposition of the electrically active material in the form of a thin film. The application of said electrodes in high power lithium ion insertion batteries, photovoltaic cells, supercapacitors and fast electrochromic devices is disclosed.

Description

[0001] This application is a divisional application of the parent application with application number 02810262.2. The filing date of the parent case is March 20, 2002; the title of the invention is "Mesoporous Mesh Electrode for Electrochemical Battery". technical field [0002] The present invention relates to electrodes and electrochemical cells containing said electrodes. In particular, it relates to electrochemical cells employing materials such as non-aqueous organic electrolytes, solid polymer electrolytes, etc., and more particularly, to porous electrode materials thereof, that is, anodes characterized by discrete and cathode electrode material, preferably doped or undoped oxide, hydroxide or chalcogenide nanoparticles, optionally plus microparticles, which are in direct electrical and mechanical contact, thereby forming Porous mesh coating. [0003] When the electrolyte is in contact with the mesoporous three-dimensional framework structure, it forms a double-linked ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/02H01M4/48H01M4/58H01M4/62H01M2/16H01M4/04H01G9/00H01G9/04G02F1/1503G02F1/155H01G9/20H01G11/48H01G11/56H01M4/13H01M4/131H01M4/36H01M4/485H01M4/50H01M4/505H01M4/52H01M4/525H01M6/40H01M10/0525H01M10/36H01M50/434
CPCH01G11/48H01M4/485H01M4/131H01M6/40G02F2001/1502Y02E60/122H01G11/56G02F2202/36Y02E60/13H01G9/2027H01M4/13H01M2004/021H01M4/04B82Y20/00Y02E10/542H01G9/2031H01M4/02G02F1/155H01M10/0525H01M4/525H01M4/362G02F1/1521H01M2/1673H01M4/505H01M2/1646H01G9/155G02F1/1503Y02E60/10H01M50/46H01G11/24H01G11/38H01M50/434H01G9/042B82Y30/00
Inventor F·萨瑙克斯M·格雷策尔N·帕帕斯
Owner XOLIOX SA
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