title: Polymer-bound pyrene-4,5,9,10-tetraone for fast-charge and -discharge lithium-ion batteries with high capacity.
abstract: Organic rechargeable batteries have received significant research interest from the viewpoints of structural diversity and sustainability of electrode materials. We designed core structures of organic cathode materials for lithium-ion (Li-ion) batteries based on density functional theory (DFT) calculations, which indicated that six-membered cyclic 1,2-diketones serve as excellent core structures because of the high redox energy change resulting from favorable coordination of the oxygen atoms to Li and the aromaticity of the reduced form. Here, we show that the Li-ion battery composed of pyrene-4,5,9,10-tetraone (PYT), which has two six-membered cyclic 1,2-diketone units, bound to polymethacrylate exhibits remarkable charge-discharge properties with a high specific capacity of 231 mAh/g, excellent rechargeability (83% of the capacity retained after 500 cycles), and charge-discharge ability (90% of the capacity at 30 C as compared to 1 C) in the LiNTf(2)/tetraglyme ionic-liquid system.
authors.affiliation: Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Nishikyo-ku, Kyoto City, Kyoto 615-8510, Japan.
authors.forename: Toshiki
authors.initials: T
authors.lastname: Nokami
authors.forename: Takahiro
authors.initials: T
authors.lastname: Matsuo
authors.forename: Yuu
authors.initials: Y
authors.lastname: Inatomi
authors.forename: Nobuhiko
authors.initials: N
authors.lastname: Hojo
authors.forename: Takafumi
authors.initials: T
authors.lastname: Tsukagoshi
authors.forename: Hiroshi
authors.initials: H
authors.lastname: Yoshizawa
authors.forename: Akihiro
authors.initials: A
authors.lastname: Shimizu
authors.forename: Hiroki
authors.initials: H
authors.lastname: Kuramoto
authors.forename: Kazutomo
authors.initials: K
authors.lastname: Komae
authors.forename: Hiroaki
authors.initials: H
authors.lastname: Tsuyama
authors.forename: Jun-ichi
authors.initials: J
authors.lastname: Yoshida