The sucrose-assisted NiCo2O4@C composites with enhanced lithium-storage properties

被引：60
作者：
Mo, Yudi [1 ,2 ]
Ru, Qiang [1 ,2 ]
Song, Xiong [1 ]
Guo, Lingyun [1 ]
Chen, Junfen [1 ,2 ]
Hou, Xianhua [1 ,2 ]
Hu, Shejun [1 ,2 ]
机构：
[1] Guangdong Engn Technol Res Ctr Efficient Green En, Guangzhou 510006, Guangdong, Peoples R China
[2] South China Normal Univ, Sch Phys & Telecommun Engn, Guangdong Prov Key Lab Quantum Engn & Quantum Mat, Guangzhou 510006, Guangdong, Peoples R China
来源：
CARBON | 2016年 / 109卷
关键词：
HIGH-PERFORMANCE SUPERCAPACITORS; REDUCED GRAPHENE OXIDE; ION BATTERY ANODES; ELECTROCHEMICAL PERFORMANCE; MICROWAVE SYNTHESIS; NANOSHEET ARRAYS; CARBON NANOTUBES; RATE-CAPABILITY; MNCO2O4; ELECTRODE;
D O I：
10.1016/j.carbon.2016.08.055
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
In this paper, porous NiCo2O4@amorphous carbon (NCO@C) composites have been designed and fabricated via a sucrose-assisted hydrothermal method where sucrose act as carbon sources and chelating agent, followed by annealing in air atmosphere. The synthesized NCO@C composites exhibited porous, polycrystalline, and carbon-coated nature. When it was used as anode material for lithium-ion batteries, the porous NCO@C composite electrode delivered a high discharge specific capacity of 1224.8 mAh g(-1) with 133.6% of the second reversible capacity over 190 cycles at a current density of 500 mA g(-1). Even at a current density as high as 4000 mA g(-1), a reversible capacity of 675.4 mAh g(-1) was still obtained. The enhanced Li-storage performance should be attributed to the porous and firm nanostructure coated with a thin amorphous carbon layer (similar to 2 nm), as well as synergistic effects of NCO@C composites. (C) 2016 Elsevier Ltd. All rights reserved.
引用
收藏
页码：616 / 623
页数：8
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