title: A high-capacity, low-cost layered sodium manganese oxide material as cathode for sodium-ion batteries.
abstract: A layered sodium manganese oxide material (NaMn3 O5 ) is introduced as a novel cathode materials for sodium-ion batteries. Structural characterizations reveal a typical Birnessite structure with lamellar stacking of the synthetic nanosheets. Electrochemical tests reveal a particularly large discharge capacity of 219 mAh g(-1) in the voltage rang of 1.5-4.7 V vs. Na/Na(+) . With an average potential of 2.75 V versus sodium metal, layered NaMn3 O5 exhibits a high energy density of 602 Wh kg(-1) , and also presents good rate capability. Furthermore, the diffusion coefficient of sodium ions in the layered NaMn3 O5 electrode is investigated by using the galvanostatic intermittent titration technique. The results greatly contribute to the development of room-temperature sodium-ion batteries based on earth-abundant elements.
authors.affiliation: Energy Technology Research Institute, National Institute of Advanced industrial Science and Technology (AIST), AIST Tsukuba Central 2, Tsukuba, Ibaraki 305-8568 (Japan), Fax: (+81) 29-861-3489; Graduate School of System and Information Engineering, University of Tsukuba, Tennoudai 1-1-1, Tsukuba, 305-8573 (Japan).
authors.forename: Shaohua
authors.initials: S
authors.lastname: Guo
authors.forename: Haijun
authors.initials: H
authors.lastname: Yu
authors.forename: Zelang
authors.initials: Z
authors.lastname: Jian
authors.forename: Pan
authors.initials: P
authors.lastname: Liu
authors.forename: Yanbei
authors.initials: Y
authors.lastname: Zhu
authors.forename: Xianwei
authors.initials: X
authors.lastname: Guo
authors.forename: Mingwei
authors.initials: M
authors.lastname: Chen
authors.forename: Masayoshi
authors.initials: M
authors.lastname: Ishida
authors.forename: Haoshen
authors.initials: H
authors.lastname: Zhou
mesh_terms: D011211:Electric Power Supplies / Q000191:economics*; D004563:Electrochemistry; D004566:Electrodes; D017895:Manganese Compounds / Q000737:chemistry*; D010087:Oxides / Q000737:chemistry*; D012964:Sodium / Q000737:chemistry*; D013696:Temperature
chemical_list: D017895:Manganese Compounds; D010087:Oxides; C505018:birnessite; C027424:manganese oxide; D012964:Sodium
keywords: cathodes; electrochemistry; energy storage; layered compounds; sodium-ion batteries