title: Template-free synthesis of amorphous double-shelled zinc-cobalt citrate hollow microspheres and their transformation to crystalline ZnCo2O4 microspheres.
abstract: A novel and facile approach was developed for the fabrication of amorphous double-shelled zinc-cobalt citrate hollow microspheres and crystalline double-shelled ZnCo2O4 hollow microspheres. In this approach, amorphous double-shelled zinc-cobalt citrate hollow microspheres were prepared through a simple route and with an aging process at 70 °C. The combining inward and outward Ostwald ripening processes are adopted to account for the formation of these double-shelled architectures. The double-shelled ZnCo2O4 hollow microspheres can be prepared via the perfect morphology inheritance of the double-shelled zinc-cobalt citrate hollow microspheres, by calcination at 500 °C for 2 h. The resultant double-shelled ZnCo2O4 hollow microspheres manifest a large reversible capacity, superior cycling stability, and good rate capability.
authors.affiliation: Department of Materials Science and Engineering, College of Materials, Xiamen University, Xiamen 361005, China.
authors.forename: Qingshui
authors.initials: Q
authors.lastname: Xie
authors.forename: Feng
authors.initials: F
authors.lastname: Li
authors.forename: Huizhang
authors.initials: H
authors.lastname: Guo
authors.forename: Laisen
authors.initials: L
authors.lastname: Wang
authors.forename: Yuanzhi
authors.initials: Y
authors.lastname: Chen
authors.forename: Guanghui
authors.initials: G
authors.lastname: Yue
authors.forename: Dong-Liang
authors.initials: DL
authors.lastname: Peng
mesh_terms: D002951:Citrates / Q000737:chemistry; D003035:Cobalt / Q000737:chemistry*; D004566:Electrodes; D008854:Microscopy, Electron; D008863:Microspheres; D053758:Nanoparticles / Q000737:chemistry; D010087:Oxides / Q000737:chemistry*; D014961:X-Ray Diffraction; D015032:Zinc / Q000737:chemistry*
chemical_list: D002951:Citrates; D010087:Oxides; D003035:Cobalt; D015032:Zinc; C060728:cobalt oxide