ガス拡散電極基材およびその製造方法ならびにガス拡散電極、膜電極接合体および固体高分子形燃料電池

• Format: Patent
• Language: Japanese
• Published: 25.04.2019
• Subjects: BASIC ELECTRIC ELEMENTS; BRAIDING; CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS; COTTON-WOOL; ELECTRICITY; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS,NON-WOVEN FABRICS; FINISHING, DRESSING, TENTERING OR STRETCHING TEXTILE FABRICS; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; KNITTING; LACE-MAKING; LAUNDERING; MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARYMATERIAL; NON-WOVEN FABRICS; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; TEXTILES; TREATMENT OF TEXTILES OR THE LIKE; TRIMMINGS; WADDING

本発明は、炭素繊維不織布からなるガス拡散電極における排水性を向上させることを課題とする。本発明は、炭素繊維不織布から本質的になるガス拡散電極基材であって、炭素繊維不織布は、面内に、相対的に高い目付を有する高目付領域と相対的に低い目付を有する低目付領域が配置されてなる目付パターンを有するとともに、少なくとも一方の面に、凹部と凸部が配置されてなる凹凸パターンであって、目付パターンと独立して形成された凹凸パターンを有するガス拡散電極基材である。 The purpose of the present invention is to improve water drainage performance of a gas diffusion electrode including a carbon fiber nonwoven fabric. The present invention provides a gas diffusion electrode base material essentially consisting of a carbon fiber nonwoven fabric, wherein the carbon fiber nonwoven fabric has an in-plane basis weight pattern in which high basis weight regions having a relatively high basis weight and low basis weight regions having a relatively low basis weight are arranged, and the carbon fiber nonwoven fabric has on at least one surface an uneven pattern in which recesses and projections are arranged, the uneven pattern being formed independently of the basis weight pattern.