PRE-DOPING METHOD FOR NEGATIVE ELECTRODE ACTIVE MATERIAL, PRODUCTION METHOD FOR NEGATIVE ELECTRODE, AND PRODUCTION METHOD FOR POWER STORAGE DEVICE

• Main Authors: HORIE, Hideaki, ANDO, Nobuo, TSUCHIDA, Kazuya, KUSACHI, Yuki, YAMAUCHI, Noboru, KABURAGI, Tomohiro, SHOJI, Naofumi, NAKASHIMA, Yusuke, KOKUBO, Terukazu, ASANO, Shigehito, SUMIYA, Koji, DOI, Shotaro, KOGA, Yasuyuki
• Format: Patent
• Language: English; French; German
• Published: 30.12.2020
• Subjects: BASIC ELECTRIC ELEMENTS; CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES ORLIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE; ELECTRICITY; PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSIONOF CHEMICAL INTO ELECTRICAL ENERGY

A predoping method for a negative electrode active material to dope the negative electrode active material with lithium ions. The predoping method for a negative electrode active material includes: a predoping process and a post-doping modification process. In the predoping process, the negative electrode active material is doped with lithium ions, to thereby reduce a potential of the negative electrode active material relative to lithium metal. In the post-doping modification process, after the predoping process, reaction is caused between a reactive compound that is reactive with lithium ions and lithium ions doped into the negative electrode active material, to thereby increase the potential of the negative electrode active material relative to lithium metal. The potential of the negative electrode active material relative to lithium metal is 0.8 V or more at completion of the post-doping modification process.