Kathodenmaterial und dieses verwendende Sekundärbatterie

A cathode material made of anhydrous ferric sulfate with a hexagonal crystal structure is presented for use in a secondary battery which generates a stable open-circuit-voltage of about 3.6 volts and offers a recharge cycling capacity of over 100 times. The cathode material is obtained by heating hy...

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Bibliographische Detailangaben
Hauptverfasser: OKADA, SHIGETO, MITO-SHI, IBARAKI-KEN, JP, SHIBATA, MASASI, MITO-SHI, IBARAKI-KEN, JP, ICHIMURA, MASAHIRO, KAWASAKI-SHI, KANAGAWA-KEN, JP, ARAI, HAJIME, MITO-SHI, IBARAKI-KEN, JP, OHTSUKA, HIDEAKI, MITO-SHI, IBARAKI-KEN, JP
Format: Patent
Sprache:ger
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Zusammenfassung:A cathode material made of anhydrous ferric sulfate with a hexagonal crystal structure is presented for use in a secondary battery which generates a stable open-circuit-voltage of about 3.6 volts and offers a recharge cycling capacity of over 100 times. The cathode material is obtained by heating hydrous iron sulfate material in a temperature range between 250 and 600 DEG C to remove the water of crystallization. The secondary battery made with this cathode material provides a long-service life and a stable output voltage economically, because the starting material, iron sulfate, is abundantly available at relatively low cost.