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Structure suitable for solid electrochemical elements
| Details |
Inventors: Kondo, Shigeo; Yasuda, Naoshi; Nagata, Masaki; Sotomura, Tadashi;
Assignee: Japan Synthetic Rubber Co., Ltd. (Tokyo, JP); Matsushita Electric Industrial Co., Ltd. (Osaka, JP)
Primary Examiner: Skapars; Anthony
Assistant Examiner:
Attorney, Agent or Firm: Spencer & Frank
A structure comprising a pair of electrode sheets and an electrolyte sheet, the latter being sandwiched in between the former, wherein each of the pair of electrode sheets comprises a mixture comprising an insulating elastomer and an electrode active substance powder and/or an inorganic solid electrolyte powder, in which mixture the electrode active substance powder and/or the inorganic solid electrolyte powder are dispersed in a volume fraction of 75-95% in the insulating elastomer, and said electrolyte sheet comprises a mixture of an inorganic solid electrolyte powder and an insulating elastomer and optionally an electrode active substance powder, in which mixture the inorganic solid electrolyte powder and optionally the electrode active substance powder are dispersed in a volume fraction of 55-95% in the insulating elastomer. Each of said electrode sheet and said electrolyte sheet may further comprise a reticulate material sheet, the openions of which are filled with the mixture. The structure is excellent in ion-conductivity, processability, productivity, storage stability and flexibility and enables one to make solid electrolyte cells, solid electric double layer capacitors and solid electrochromic display thinner and larger in area. |
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DETAILED DESCRIPTION What is claimed is: 1.
A structure comprising a pair of electrode sheets and an electrolyte sheet, said electrolyte sheet being sandwiched in between the pair of electrode sheets, wherein each of the pair of electrode sheets is composed of a mixture comprising an insulating elastomer and an electrode active substance powder alone or in combination with an inorganic solid electrolyte powder, in which mixture the electrode active substance powder or the combination thereof with an inorganic solid electrolyte powder is dispersed in a volume fraction of 75-95% in the insulating elastomer, and said electrolyte sheet is composed of a mixture comprising an insulating elastomer and an inorganic solid electrolyte powder, in which mixture the inorganic solid electrolyte powder is dispersed in a volume fraction of 55-95% in the insulating elastomer.
2.
The structure according to claim 1, wherein each of the electrode sheets is a laminate of a plurality of layers of mixtures of the electrode active substance powder and the inorganic solid electrolyte powder at different mixing ratios which are varied stepwise, said layers of the mixture being arranged in the order of the mixing ratios, and the laminate layer having the highest mixing ratio of the inorganic electrolyte powder is in contact with the electrolyte sheet.
3.
The structure according to claim 1, wherein the inorganic solid electrolyte powder is a Li.
sup.
+ ion-conductive solid electrolyte powder, a Ag.
sup.
+ ion-conductive electrolyte powder, a Cu.
sup.
+ ion-conductive electrolyte powder, a H.
sup.
+ ion-conductive electrolyte powder or a Na.
sup.
+ ion-conductive electrolyte powder.
4.
The structure according to claim 3, wherein the inorganic solid electrolyte powder is a Cu.
sup.
+ ion-conductive electrolyte powder.
5.
The structure according to claim 4, wherein the Cu.
sup.
+ ion-conductive electrolyte powder is represented by the formula, RbCu.
sub.
4 I.
sub.
2-x Cl.
sub.
3-x in which x is an arbitrary number of 0.
2-0.
6.
6.
The structure according to claim 1, wherein the electrode active substance powder is at least one member selected from the group consisting of carbonaceous materials, metal sulfides, metal oxides, metal halides and metals
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Fuel Cells 
