期刊
ENERGY STORAGE MATERIALS
卷 6, 期 -, 页码 61-69出版社
ELSEVIER
DOI: 10.1016/j.ensm.2016.10.005
关键词
Sliced orange-shaped ZnCo2O4; Radially aligned nanoparticles; Lithium-ion battery anode; Long life; Cycling-induced morphology transformation
资金
- National Key Basic Research Program of China [2014CB932400]
- China Postdoctoral Science Foundation [2013M530617]
- National Natural Science Foundation of China [U1401243, 51202121, 51232005]
- NSAF [U1330123]
- Shenzhen Technical Plan Project [JCYJ20150529164918735, ZDSYS20140509172959981, JCYJ20140417115840246]
Sliced orange-shaped ZnCo2O4 (SOS-ZCO) constructed by radically aligned subunit nanoparticles is solvothermally synthesized for the first time. When used as lithium-ion battery (LIB) anode, SOS-ZCO demonstrates excellent electrochemical performances benefiting from its advantageous structural features. It shows a high reversible capacity of 890 mA h g(-1) at 0.2 A g(-1) and good rate capability with capacity retention of 47% at 5 A g(-1). Moreover, it displays a superior cycling stability with 96.5% capacity retention over 130 cycles at 0.2 A g(-1) and 92.3% capacity retention over 300 cycles at 1 A g(-1). It is noteworthy that during high-rate cycling, SOS-ZCO anode does not show common pulverization phenomenon to form irregular morphology, but experiences regular morphology transformation. In the first 100 high-rate cycles, SOS-ZCO anode transforms into a network of randomly arranged nanowires with high firmness, leading to negligible capacity fading in the following 200 cycles. Therefore, novel SOS-ZCO micro-/nanostructure exhibits great potential for high-performance LIB anode.
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