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PROTON CONDUCTOR AND FUEL BATTERY

Foreign code F200010094
File No. 5669
Posted date May 15, 2020
Country WIPO
International application number 2018JP005443
International publication number WO 2018159324
Date of international filing Feb 16, 2018
Date of international publication Sep 7, 2018
Priority data
  • P2017-039623 (Mar 2, 2017) JP
Title PROTON CONDUCTOR AND FUEL BATTERY
Abstract This proton conductor comprises a complex between phosphoric acid molecules and a coordination polymer wherein metal ions and ligands are linked successively by coordinate bonds. The phosphoric acid molecules include phosphoric acid molecules that are coordinate bonded to a metal ion, and phosphoric acid molecules that are not coordinate bonded to a metal ion. This allows, in the proton conductor comprising the structure containing the phosphoric acid molecules, the ion conductivity to be increased, and further, the stability of the structure to be improved.
Outline of related art and contending technology BACKGROUND ART
Currently, the cost of the solid polymer type fuel cell system, from the viewpoint of simplification of the system, and at the operating temperature of 100°C or more to a fuel cell operating in non-humidified conditions is demanded. Non-humidified fuel cell in order to operate, a proton conductor plays an important role. The phosphoric acid the proton is a carrier from the promising, a phosphoric acid-containing structure containing a phosphoric acid is considered to be preferred as the proton conductor.
As a phosphoric acid-containing structure, phosphoric acid and the other components of the chemical bond to form a structure (for example, phosphosilicate glass, phosphate glass, metal salt of phosphoric acid) is present, and there is a problem with water resistance, ionic conductivity is further low. In addition, the chemically stable by introducing a matrix material and a phosphoric acid, a phosphoric acid-containing structure has been proposed to generate (for example, Non-Patent Document 1, 2). Such a matrix material, the capillary phenomenon of the pores and can be used, as the material of the proton conductor is expected.
Scope of claims (In Japanese)[請求項1]
 金属イオンと配位子が配位結合で連続的につながった配位高分子と、リン酸との複合体を備え、
 前記リン酸は、前記金属イオンと配位結合しているリン酸と、前記金属イオンと配位結合していないリン酸とを含んでいるプロトン伝導体。

[請求項2]
 前記金属イオンを構成する金属は、3価の遷移金属である請求項1に記載のプロトン伝導体。

[請求項3]
 前記金属イオンを構成する金属は、V、Cr、Mn、Fe、Co、Niからなる群から選ばれる少なくとも一種である請求項2に記載のプロトン伝導体。

[請求項4]
 前記配位子は、前記金属イオンと配位結合する部分として、カルボシル基あるいはホスホン酸基を2以上有している請求項1ないし3のいずれか1つに記載のプロトン伝導体。

[請求項5]
 前記配位子は、シュウ酸、アセチレンジカルボン酸、フマル酸、テレフタル酸、トリメシン酸、ピロメリット酸、1,4-ジカルボキシナフタレン、2,6-ジカルボキシナフタレンからなる群から選ばれる少なくとも一種である請求項4に記載のプロトン伝導体。

[請求項6]
 前記複合体は、前記金属イオンに対して4~5等量の前記リン酸を含んでいる請求項1ないし5のいずれか1つに記載のプロトン伝導体。

[請求項7]
 請求項1ないし6のいずれか1つに記載のプロトン伝導体を電解質膜(130)として備える燃料電池。
  • Applicant
  • ※All designated countries except for US in the data before July 2012
  • DENSO CORPORATION
  • KYOTO UNIVERSITY
  • Inventor
  • ITAKURA Tomoya
  • HIRAMATSU Hidehiko
  • KITAGAWA Susumu
  • HORIKE Satoshi
IPC(International Patent Classification)
Specified countries National States: AE AG AL AM AO AT AU AZ BA BB BG BH BN BR BW BY BZ CA CH CL CN CO CR CU CZ DE DJ DK DM DO DZ EC EE EG ES FI GB GD GE GH GM GT HN HR HU ID IL IN IR IS JO KE KG KH KN KP KR KW KZ LA LC LK LR LS LU LY MA MD ME MG MK MN MW MX MY MZ NA NG NI NO NZ OM PA PE PG PH PL PT QA RO RS RU RW SA SC SD SE SG SK SL SM ST SV SY TH TJ TM TN TR TT TZ UA UG US UZ VC VN ZA ZM ZW
ARIPO: BW GH GM KE LR LS MW MZ NA RW SD SL SZ TZ UG ZM ZW
EAPO: AM AZ BY KG KZ RU TJ TM
EPO: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
OAPI: BF BJ CF CG CI CM GA GN GQ GW KM ML MR NE SN ST TD TG
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