title: B,N-Co-doped Graphene Supported Sulfur for Superior Stable Li-S Half Cell and Ge-S Full Battery.
abstract: B,N-Co-doped graphene supported sulfur (S@BNG) composite is synthesized by using melamine diborate as precursor. XPS spectra illustrates that BNG with a high percentage and dispersive B, N (B = 13.47%, N = 9.17%) and abundant pyridinic-N and N-B/N═B bond, show strong interaction with Li2Sxproved by adsorption simulation experiments. As cathode for Li-S half cell, S@BNG with a sulfur content of 75% displays a reversible capacity of 765 mA h g-1at 1 C even after 500 cycles (a low fading rate of 0.027% per cycle). Even at a high sulfur loading of 4.73 mg cm-2, S@BNG still shows a high and stable areal capacity of 3.5 mA h cm-2after 48 cycles. When S@BNG composite as cathode combines with high performance lithiated Ge anode (discharge capacity of 1138 mA h g-1over 1000 cycles at 1 C in half cell), the assembled Ge-S full battery exhibits a superior capacity of 530 mA h g-1over 500 cycles at the rate of 1 C.
authors.affiliation: Hefei National Laboratory for Physical Science at Microscale and Department of Chemistry, University of Science and Technology of China , Hefei, Anhui 230026, China.
authors.forename: Wenlong
authors.initials: W
authors.lastname: Cai
authors.affiliation: Hefei National Laboratory for Physical Science at Microscale and Department of Chemistry, University of Science and Technology of China , Hefei, Anhui 230026, China.
authors.forename: Jianbin
authors.initials: J
authors.lastname: Zhou
authors.affiliation: Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University , Hangzhou 310027, China.
authors.forename: Gaoran
authors.initials: G
authors.lastname: Li
authors.affiliation: Hefei National Laboratory for Physical Science at Microscale and Department of Chemistry, University of Science and Technology of China , Hefei, Anhui 230026, China.
authors.forename: Kailong
authors.initials: K
authors.lastname: Zhang
authors.affiliation: Hefei National Laboratory for Physical Science at Microscale and Department of Chemistry, University of Science and Technology of China , Hefei, Anhui 230026, China.
authors.forename: Xianyu
authors.initials: X
authors.lastname: Liu
authors.affiliation: Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University , Hangzhou 310027, China.
authors.forename: Can
authors.initials: C
authors.lastname: Wang
authors.affiliation: Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University , Hangzhou 310027, China.
authors.forename: Heng
authors.initials: H
authors.lastname: Zhou
authors.affiliation: Hefei National Laboratory for Physical Science at Microscale and Department of Chemistry, University of Science and Technology of China , Hefei, Anhui 230026, China.
authors.forename: Yongchun
authors.initials: Y
authors.lastname: Zhu
authors.affiliation: Hefei National Laboratory for Physical Science at Microscale and Department of Chemistry, University of Science and Technology of China , Hefei, Anhui 230026, China.
authors.forename: Yitai
authors.initials: Y
authors.lastname: Qian
keywords: B; Ge−S full battery; N-co-doped graphene; high content of heteroatoms; nano Ge; strong chemisorption