Reversible phase transformation of MnO2 nanosheets in an electrochemical capacitor investigated by in situ Raman spectroscopy |
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Authors: | Hsu Yu-Kuei Chen Ying-Chu Lin Yan-Gu Chen Li-Chyong Chen Kuei-Hsien |
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Affiliation: | Institute of Atomic and Molecular Science, Academia Sinica, Taipei 106, Taiwan. |
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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. |
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