All-solid-state electric double-layer capacitor with isotropic high-density graphite electrode and polyethylene oxide/LiClO4 polymer electrolyte

Xingjiang Liu, Tetsuya Osaka

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Abstract

An isotropic high-density graphite was used as a polarizable electrode of all-solid state electric double-layer capacitor using polyethylene oxide (PEO) or gel PEO electrolyte. The all-solid-state capacitor with high-density graphite electrodes possesses higher differential capacity than the other flat electrodes in PEO/LiClO4 ([EO]/[Li+] = 8:1) solid polymer electrolyte at 80°C or PEO/PC/LiClO4 ([EO]/[PC]/[Li+] = 8:8:1) gel electrolyte at ambient temperature. The capacitance of the electric double layer of the high-density graphite electrode was strongly influenced by the cell temperature and concentration of LiClO4, because of the different state of the polymer crystallinity and different interface contact state between the high-density graphite electrode and the solid electrolyte. The all-solid-state capacitor with PEO/LiClO4 ([EO]/[Li+] = 8:1) solid polymer electrolyte and PEO/PC/LiClO4 ([EO]/[PC]/[Li+] = 8:8:1) gel electrolytes showed good charge/discharge behavior with a relatively high capacitance at 80 and 20°C, respectively.

Original languageEnglish
Pages (from-to)3982-3986
Number of pages5
JournalJournal of the Electrochemical Society
Volume143
Issue number12
Publication statusPublished - 1996 Dec

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Graphite electrodes
electrochemical capacitors
Polyethylene oxides
Electrolytes
polyethylenes
Polymers
graphite
electrolytes
solid state
electrodes
oxides
polymers
Gels
gels
capacitors
Capacitors
Capacitance
capacitance
Electrodes
Graphite

ASJC Scopus subject areas

  • Electrochemistry
  • Surfaces, Coatings and Films
  • Surfaces and Interfaces

Cite this

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abstract = "An isotropic high-density graphite was used as a polarizable electrode of all-solid state electric double-layer capacitor using polyethylene oxide (PEO) or gel PEO electrolyte. The all-solid-state capacitor with high-density graphite electrodes possesses higher differential capacity than the other flat electrodes in PEO/LiClO4 ([EO]/[Li+] = 8:1) solid polymer electrolyte at 80°C or PEO/PC/LiClO4 ([EO]/[PC]/[Li+] = 8:8:1) gel electrolyte at ambient temperature. The capacitance of the electric double layer of the high-density graphite electrode was strongly influenced by the cell temperature and concentration of LiClO4, because of the different state of the polymer crystallinity and different interface contact state between the high-density graphite electrode and the solid electrolyte. The all-solid-state capacitor with PEO/LiClO4 ([EO]/[Li+] = 8:1) solid polymer electrolyte and PEO/PC/LiClO4 ([EO]/[PC]/[Li+] = 8:8:1) gel electrolytes showed good charge/discharge behavior with a relatively high capacitance at 80 and 20°C, respectively.",
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N2 - An isotropic high-density graphite was used as a polarizable electrode of all-solid state electric double-layer capacitor using polyethylene oxide (PEO) or gel PEO electrolyte. The all-solid-state capacitor with high-density graphite electrodes possesses higher differential capacity than the other flat electrodes in PEO/LiClO4 ([EO]/[Li+] = 8:1) solid polymer electrolyte at 80°C or PEO/PC/LiClO4 ([EO]/[PC]/[Li+] = 8:8:1) gel electrolyte at ambient temperature. The capacitance of the electric double layer of the high-density graphite electrode was strongly influenced by the cell temperature and concentration of LiClO4, because of the different state of the polymer crystallinity and different interface contact state between the high-density graphite electrode and the solid electrolyte. The all-solid-state capacitor with PEO/LiClO4 ([EO]/[Li+] = 8:1) solid polymer electrolyte and PEO/PC/LiClO4 ([EO]/[PC]/[Li+] = 8:8:1) gel electrolytes showed good charge/discharge behavior with a relatively high capacitance at 80 and 20°C, respectively.

AB - An isotropic high-density graphite was used as a polarizable electrode of all-solid state electric double-layer capacitor using polyethylene oxide (PEO) or gel PEO electrolyte. The all-solid-state capacitor with high-density graphite electrodes possesses higher differential capacity than the other flat electrodes in PEO/LiClO4 ([EO]/[Li+] = 8:1) solid polymer electrolyte at 80°C or PEO/PC/LiClO4 ([EO]/[PC]/[Li+] = 8:8:1) gel electrolyte at ambient temperature. The capacitance of the electric double layer of the high-density graphite electrode was strongly influenced by the cell temperature and concentration of LiClO4, because of the different state of the polymer crystallinity and different interface contact state between the high-density graphite electrode and the solid electrolyte. The all-solid-state capacitor with PEO/LiClO4 ([EO]/[Li+] = 8:1) solid polymer electrolyte and PEO/PC/LiClO4 ([EO]/[PC]/[Li+] = 8:8:1) gel electrolytes showed good charge/discharge behavior with a relatively high capacitance at 80 and 20°C, respectively.

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