Development of Lithium Ion Battery and Recent Technology Trends

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  • YOSHINO Akira
    Rechargeable Ion Battery Division, Asahi Chemical Industry Co., Ltd.; The Arcaeast 17F, 3-2-1, Kinshi, Sumida-ku, Tokyo 130-6591 Japan
  • OTSUKA Kenji
    A & T Battery Corporation; 4-10-27, Higashishinagawa, Shinagawa-ku, Tokyo 140-0002 Japan
  • NAKAJIMA Takayuki
    A & T Battery Corporation; 4-10-27, Higashishinagawa, Shinagawa-ku, Tokyo 140-0002 Japan
  • KOYAMA Akira
    A & T Battery Corporation; 4-10-27, Higashishinagawa, Shinagawa-ku, Tokyo 140-0002 Japan
  • NAKAJYO Satoshi
    A & T Battery Corporation; 4-10-27, Higashishinagawa, Shinagawa-ku, Tokyo 140-0002 Japan

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  • リチウムイオン二次電池の開発と最近の技術動向
  • リチウム イオン 2ジデンチ ノ カイハツ ト サイキン ノ ギジュツ ドウコウ

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Lithium ion battery has been widely used for cellular phones, notebook personal computers and camcorders.<BR>Development and technology trend of lithium ion battery are reviewed. The origin of lithium ion battery was the research on secondary battery using an electroconductive polymer, polyacetylene, as the negative electrode. Then the focus was shifted from polyacetylene to carbonaceous materials which also have π electrons. They were combined with a lithium ion-containing metal oxide, LiCoO2 as the positive electrode.<BR>Capacity of the lithium ion battery has been increased every year and present capacity is twice as much as the initial value.<BR>This improvement of capacity has been achieved by improvement of carbonaceous materials.

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