@article{oai:repo.qst.go.jp:00075559,
 author = {Niwa, Hideharu and Higashiyama, Kazuyuki and Amaha, Karol and Kobayashi, Wataru and Ishii, Kenji and Moritomo, Yutaka and Ishii, Kenji},
 issue = {5},
 journal = {Applied Physics Express},
 month = {Apr},
 note = {The 3d transition metal oxides with layered structures, NaxMO2 (M = Mn, Co), are promising cathode materials for Na-ion secondary batteries. Here, we investigate the electronic structure of the M of four layered oxides (Na0.91CoO2, Na0.66CoO2, Na1.00MnO2, and Na0.54MnO2) by means of high energy resolution fluorescence detected X-ray absorption near-edge structure, which utilizes the 1s core-hole lifetime-broadening reduction. The highly energy-resolved spectroscopy reveals a shoulder structure in the pre-edge regions of the Co K-edge spectra in Na0.91CoO2. The structure is ascribed to the transition to the Co 3d/4p states via slight hybridization with the Na 3s state.},
 pages = {052005-1--052005-5},
 title = {High-energy-resolution XANES of layered oxides for sodium-ion battery},
 volume = {12},
 year = {2019}
}