期刊
ACS NANO
卷 10, 期 1, 页码 1283-1291出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsnano.5b06650
关键词
zinc oxide; silver; sandwich-like shells; hybrid hollow microspheres; lithium storage properties
类别
资金
- National Basic Research Program of China [2012CB933103]
- National Natural Science Foundation of China [51171158, 51371154, 51571167]
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) ican 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.
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