title: The Electrochemistry with Lithium versus Sodium of Selenium Confined To Slit Micropores in Carbon.
abstract: Substitution of selenium for sulfur in the cathode of a rechargeable battery containing Sx molecules in microporous slits in carbon allows a better characterization of the electrochemical reactions that occur. Paired with a metallic lithium anode, the Sex chains are converted to Li2Se in a single-step reaction. With a sodium anode, a sequential chemical reaction is characterized by a continuous chain shortening of Sex upon initial discharge before completing the reduction to Na2Se; on charge, the reconstituted Sex molecules retain a smaller x value than the original Sex chain molecule. In both cases, the Se molecules remain almost completely confined to the micropore slits to give a long cycle life.
authors.affiliation: School of Chemistry and Chemical Engineering, Hefei University of Technology , Hefei, Anhui 230009, People's Republic of China.|Materials Science and Engineering Program and Texas Materials Institute, The University of Texas at Austin , 1 University Station, C2201, Austin, Texas 78712, United States.
authors.forename: Sen
authors.initials: S
authors.lastname: Xin
authors.affiliation: Institute of Chemistry, Chinese Academy of Sciences (CAS), and Beijing National Laboratory for Molecular Sciences (BNLMS) , Beijing 100190, People's Republic of China.
authors.forename: Le
authors.initials: L
authors.lastname: Yu
authors.affiliation: Institute of Chemistry, Chinese Academy of Sciences (CAS), and Beijing National Laboratory for Molecular Sciences (BNLMS) , Beijing 100190, People's Republic of China.
authors.forename: Ya
authors.initials: Y
authors.lastname: You
authors.affiliation: School of Chemistry and Chemical Engineering, Hefei University of Technology , Hefei, Anhui 230009, People's Republic of China.
authors.forename: Huai-Ping
authors.initials: HP
authors.lastname: Cong
authors.affiliation: Institute of Chemistry, Chinese Academy of Sciences (CAS), and Beijing National Laboratory for Molecular Sciences (BNLMS) , Beijing 100190, People's Republic of China.
authors.forename: Ya-Xia
authors.initials: YX
authors.lastname: Yin
authors.affiliation: School of Chemistry and Chemical Engineering, Hefei University of Technology , Hefei, Anhui 230009, People's Republic of China.
authors.forename: Xue-Li
authors.initials: XL
authors.lastname: Du
authors.affiliation: Institute of Chemistry, Chinese Academy of Sciences (CAS), and Beijing National Laboratory for Molecular Sciences (BNLMS) , Beijing 100190, People's Republic of China.
authors.forename: Yu-Guo
authors.initials: YG
authors.lastname: Guo
authors.affiliation: Division of Nanomaterials and Chemistry, Hefei National Laboratory for Physical Sciences at Microscale, Department of Chemistry, University of Science and Technology of China , Hefei, Anhui 230026, People's Republic of China.
authors.forename: Shu-Hong
authors.initials: SH
authors.lastname: Yu
authors.forename: Yi
authors.initials: Y
authors.lastname: Cui
authors.affiliation: Materials Science and Engineering Program and Texas Materials Institute, The University of Texas at Austin , 1 University Station, C2201, Austin, Texas 78712, United States.
authors.forename: John B
authors.initials: JB
authors.lastname: Goodenough
keywords: Energy storage; confined selenium chain; metal−selenium battery; microporous carbon; selenium electrochemistry