title: Reversible phase transformation of MnO2 nanosheets in an electrochemical capacitor investigated by in situ Raman spectroscopy.
abstract: The reversible phase transformation is reported from hexagonal to monoclinic structure responding to the intercalation/deintercalation of Na(+) between MnO(2) nanosheets upon potential cycling in aqueous electrolyte via an in situ Raman technique. This structural evolution will influence the Na(+) diffusion process in MnO(2) nanosheets and cause phase retention during the self-discharge process.
authors.affiliation: Institute of Atomic and Molecular Science, Academia Sinica, Taipei 106, Taiwan.
authors.forename: Yu-Kuei
authors.initials: YK
authors.lastname: Hsu
authors.forename: Ying-Chu
authors.initials: YC
authors.lastname: Chen
authors.forename: Yan-Gu
authors.initials: YG
authors.lastname: Lin
authors.forename: Li-Chyong
authors.initials: LC
authors.lastname: Chen
authors.forename: Kuei-Hsien
authors.initials: KH
authors.lastname: Chen