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Zinc Oxide Based Nanocomposite Thin Film Electrodes and the Effect of DC Plasma Oxidation Power on Discharge Capacity for Lithium Ion Batteries
被引:4
作者:
Akbulut, Hatem
[1
]
Guler, Mehmet Oguz
[1
]
Aydin, Yasemin
[1
]
机构:
[1] Sakarya Univ, Fac Engn, Dept Met & Mat Engn, TR-54187 Sakarya, Turkey
关键词:
Li-Ion Batteries;
Zn/ZnO Anode;
Core-Shell Structure;
Discharge Capacity;
ANODE MATERIAL;
ZNO FILMS;
ELECTROCHEMICAL-BEHAVIOR;
THERMAL-OXIDATION;
BEAM EVAPORATION;
COMPOSITE;
NANOROD;
CAPABILITY;
DEPOSITION;
MORPHOLOGY;
D O I:
10.1166/jnn.2012.6747
中图分类号:
O6 [化学];
学科分类号:
0703 ;
摘要:
Zinc oxide based thin films have been grown on glass and stainless steel substrates in two steps; thermal evaporation from high purity metallic zinc and D.C. plasma oxidation. X-ray diffraction has shown that the films were polycrystalline nature and small predominant orientation at some specific planes. Analysis showed that plasma oxidation starts from the thermally evaporated leaf-like surfaces and produces a core shell structure of ZnO on the metallic Zn. Increasing plasma oxidation power causes increased amount of ZnO volume and resistivity. Coin-type (CR2016) test cells were assembled in an argon-filled glove box and cyclically tested. The electrochemical performance of the films has been studied by cyclic voltammetry. The dependence of converted Li-ions on voltage profile of the films has been determined. It was found that the Zn/ZnO films exhibited highest the number of converted Li-ions at 175 W plasma oxidation conditions. Discharge capacity measurements revealed the double phase structures of Zn/ZnO exhibited significantly high reversible capacities. The high capacity and low capacity fade values were attributed to the high electrical conductivity and buffering ability of metallic Zn in the anodes.
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页码:9238 / 9247
页数:10
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