title: Organic tailored batteries materials using stable open-shell molecules with degenerate frontier orbitals.
abstract: Secondary batteries using organic electrode-active materials promise to surpass present Li-ion batteries in terms of safety and resource price. The use of organic polymers for cathode-active materials has already achieved a high voltage and cycle performance comparable to those of Li-ion batteries. It is therefore timely to develop approaches for high-capacity organic materials-based battery applications. Here we demonstrate organic tailored batteries with high capacity by using organic molecules with degenerate molecular orbitals (MOs) as electrode-active materials. Trioxotriangulene (TOT), an organic open-shell molecule, with a singly occupied MO (SOMO) and two degenerate lowest-unoccupied MOs (LUMOs) was investigated. A tri-tert-butylated derivative ((t-Bu)(3)TOT)exhibited a high discharge capacity of more than 300 A h kg(-1), exceeding those delivered by Li-ion batteries. A tribrominated derivative (Br(3)TOT) was also shown to increase the output voltage and cycle performance up to 85% after 100 cycles of the charge-discharge processes.
authors: Yasushi
authors: Y
authors: Morita
authors: Shinsuke
authors: S
authors: Nishida
authors: Tsuyoshi
authors: T
authors: Murata
authors: Miki
authors: M
authors: Moriguchi
authors: Akira
authors: A
authors: Ueda
authors: Masaharu
authors: M
authors: Satoh
authors: Kazunori
authors: K
authors: Arifuku
authors: Kazunobu
authors: K
authors: Sato
authors: Takeji
authors: T
authors: Takui