title: MOF-Derived Hollow Co9 S8 Nanoparticles Embedded in Graphitic Carbon Nanocages with Superior Li-Ion Storage.
abstract: Novel electrode materials consisting of hollow cobalt sulfide nanoparticles embedded in graphitic carbon nanocages (HCSP⊂GCC) are facilely synthesized by a top-down route applying room-temperature synthesized Co-based zeolitic imidazolate framework (ZIF-67) as the template. Owing to the good mechanical flexibility and pronounced structure stability of carbon nanocages-encapsulated Co9 S8 , the as-obtained HCSP⊂GCC exhibit superior Li-ion storage. Working in the voltage of 1.0-3.0 V, they display a very high energy density (707 Wh kg(-1) ), superior rate capability (reversible capabilities of 536, 489, 438, 393, 345, and 278 mA h g(-1) at 0.2, 0.5, 1, 2, 5, and 10C, respectively), and stable cycling performance (≈26% capacity loss after long 150 cycles at 1C with a capacity retention of 365 mA h g(-1) ). When the work voltage is extended into 0.01-3.0 V, a higher stable capacity of 1600 mA h g(-1) at a current density of 100 mA g(-1) is still achieved.
authors.affiliation: Max Planck Institute for Solid State Research, Heisenbergstr. 1, Stuttgart, 70569, Germany.|School of Materials Science and Engineering, South China University of Technology, Key Laboratory of Advanced Energy Storage Materials of Guangdong Province, Guangzhou, 510641, China.
authors.forename: Jun
authors.initials: J
authors.lastname: Liu
authors.affiliation: Max Planck Institute for Solid State Research, Heisenbergstr. 1, Stuttgart, 70569, Germany.
authors.forename: Chao
authors.initials: C
authors.lastname: Wu
authors.affiliation: Beijing National Laboratory for Condensed Matter Physics, The Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China.|Collaborative Innovation Center of Quantum Matter, Beijing, 100190, China.
authors.forename: Dongdong
authors.initials: D
authors.lastname: Xiao
authors.affiliation: Max Planck Institute for Solid State Research, Heisenbergstr. 1, Stuttgart, 70569, Germany.
authors.forename: Peter
authors.initials: P
authors.lastname: Kopold
authors.affiliation: Beijing National Laboratory for Condensed Matter Physics, The Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China.|Collaborative Innovation Center of Quantum Matter, Beijing, 100190, China.
authors.forename: Lin
authors.initials: L
authors.lastname: Gu
authors.affiliation: Max Planck Institute for Solid State Research, Heisenbergstr. 1, Stuttgart, 70569, Germany.
authors.forename: Peter A
authors.initials: PA
authors.lastname: van Aken
authors.affiliation: Max Planck Institute for Solid State Research, Heisenbergstr. 1, Stuttgart, 70569, Germany.
authors.forename: Joachim
authors.initials: J
authors.lastname: Maier
authors.affiliation: Key Laboratory of Materials for Energy Conversion, Chinese Academy of Sciences, Department of Chemistry and Materials Science, University of Science and Technology of China, Hefei, 230026, Anhui, China.
authors.forename: Yan
authors.initials: Y
authors.lastname: Yu
keywords: Li-ion batteries; carbon-encapsulation; electrode materials; high-energy conversion; nanocages