Solid electrolyte and electrochemical system using the solid...

C - Chemistry – Metallurgy – 08 – L

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C08L 29/04 (2006.01) B01D 53/32 (2006.01) C25B 9/00 (2006.01) C25B 13/08 (2006.01) H01M 8/10 (2006.01) C02F 1/461 (2006.01)

Patent

CA 2455265

It is an object to provide a solid electrolyte and an electrochemical system using the solid electrolyte which has a little expansion (swelling) and whose strength does not decrease in case of positioning the solid electrolyte including a complex compound composed of an inorganic compound, polyvinyl alcohol, and water, in a wet condition. It is possible to use the solid electrolyte in a device such as a fuel cell or an electrolytic device used with the wet condition. The solid electrolyte has a little size variation even if humidity varies and has a low methanol permeability. The solid electrolyte is produced by replacing a part or all of hydroxyl groups of polyvinyl alcohol domain to groups each of which has a water absorption less than that of said hydroxyl group, in the solid electrolyte including a complex compound which is composed of polyvinyl alcohol, water, and at least one inorganic compound selected from silicic acid compound, tungstic acid compound, molybdic acid compound, stannic acid compound, and zirconic acid compound.

Il s'agit d'un objet qui fournit un électrolyte solide et un système électrochimique utilisant cet électrolyte solide ayant un peu de dilatation (boursoufflure) dont la force ne diminue pas dans le cas du positionnement de l'électrolyte solide incluant un composé complexe produit d'un composé inorganique, de l'alcool polyvinylique et de l'eau, humide. Il est possible d'utiliser l'électrolyte solide dans un dispositif comme une pile à combustible ou un dispositif électrolytique utilisé humide. La taille de l'électrolyte solide varie peu, même si l'humidité varie et a une perméabilité réduite au méthanol. L'électrolyte solide est produit en remplaçant quelques-uns ou tous les groupes hydroxy du domaine de l'alcool polyvinylique aux groupes, dont chacun a une absorption d'eau plus faible que celle du groupe hydroxy, dans l'électrolyte solide incluant un composé complexe qui se compose d'un alcool polyvinylique, de l'eau et au moins un composé inorganique choisi d'un composé d'acide silicique, d'un composé d'acide tungstique, d'un composé d'acide molybdique, d'un composé d'acide stannique et d'un composé d'acide zirconique.

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