title: Electrostatic Assembly of Sandwich-like Ag-C@ZnO-C@Ag-C Hybrid Hollow Microspheres with Excellent High-Rate Lithium Storage Properties.
abstract: Herein, we introduce a facile electrostatic attraction approach to produce zinc-silver citrate hollow microspheres, followed by thermal heating treatment in argon to ingeniously synthesize sandwich-like Ag-C@ZnO-C@Ag-C hybrid hollow microspheres. The 3D carbon conductive framework in the hybrids derives from the in situ carbonation of carboxylate acid groups in zinc-silver citrate hollow microspheres during heating treatment, and the continuous and homogeneous Ag nanoparticles on the outer and inner surfaces of hybrid hollow microspheres endow the shells with the sandwiched configuration (Ag-C@ZnO-C@Ag-C). When applied as the anode materials for lithium ion batteries, the fabricated hybrid hollow microspheres with sandwich-like shells reveal a very large reversible capacity of 1670 mAh g(-1) after 200 cycles at a current density of 0.2 A g(-1). Even at the very large current densities of 1.6 and 10.0 A g(-1), the high specific capacities of about 1063 and 526 mAh g(-1) can be retained, respectively. The greatly enhanced electrochemical properties of Ag-C@ZnO-C@Ag-C hybrid microspheres are attributed to their special structural features such as the hollow structures, the sandwich-like shells, and the nanometer-sized building blocks.
authors.affiliation: Fujian Key Laboratory of Advanced Materials, Collaborative Innovation Center of Chemistry for Energy Materials, Department of Materials Science and Engineering, College of Materials, Xiamen University , Xiamen 361005, China.
authors.forename: Qingshui
authors.initials: Q
authors.lastname: Xie
authors.affiliation: Fujian Key Laboratory of Advanced Materials, Collaborative Innovation Center of Chemistry for Energy Materials, Department of Materials Science and Engineering, College of Materials, Xiamen University , Xiamen 361005, China.
authors.forename: Yating
authors.initials: Y
authors.lastname: Ma
authors.affiliation: State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, WUT-Harvard Joint Nano Key Laboratory, Wuhan University of Technology , Wuhan 430070, China.
authors.forename: Xuanpeng
authors.initials: X
authors.lastname: Wang
authors.affiliation: Fujian Key Laboratory of Advanced Materials, Collaborative Innovation Center of Chemistry for Energy Materials, Department of Materials Science and Engineering, College of Materials, Xiamen University , Xiamen 361005, China.
authors.forename: Deqian
authors.initials: D
authors.lastname: Zeng
authors.affiliation: Fujian Key Laboratory of Advanced Materials, Collaborative Innovation Center of Chemistry for Energy Materials, Department of Materials Science and Engineering, College of Materials, Xiamen University , Xiamen 361005, China.
authors.forename: Laisen
authors.initials: L
authors.lastname: Wang
authors.affiliation: State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, WUT-Harvard Joint Nano Key Laboratory, Wuhan University of Technology , Wuhan 430070, China.
authors.forename: Liqiang
authors.initials: L
authors.lastname: Mai
authors.affiliation: Fujian Key Laboratory of Advanced Materials, Collaborative Innovation Center of Chemistry for Energy Materials, Department of Materials Science and Engineering, College of Materials, Xiamen University , Xiamen 361005, China.
authors.forename: Dong-Liang
authors.initials: DL
authors.lastname: Peng
keywords: hybrid hollow microspheres; lithium storage properties; sandwich-like shells; silver; zinc oxide