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Effect of substrate temperature on morphology and electrochemical performance of radio frequency magnetron sputtered lithium nickel vanadate films used as negative electrodes for lithium microbatteries
被引:37
作者:
Reddy, MV
[1
]
Pecquenard, B
[1
]
Vinatier, P
[1
]
Levasseur, A
[1
]
机构:
[1] Univ Bordeaux 1, ICMCB, CNRS, ENSCPB, F-33607 Pessac, France
关键词:
D O I:
10.1021/jp0565554
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:
Lithium nickel vanadate thin films were prepared by radio frequency magnetron sputtering at various substrate temperatures (T-s). These thin films have been investigated as anode electrode material in the use of microbatteries. Films were characterized by Rutherford backscattering spectroscopy, nuclear reaction analysis, Auger electron spectroscopy, glancing-incidence X-ray diffraction analysis, Raman spectroscopy, scanning electron microscopy, atomic force microscopy, and high-resolution transmission electron microscopy techniques. The anodic electrochemical performances of the films have been evaluated by cyclic voltammetry at a scan rate of 1 mV/s and by galvanostatic cycling, with lithium metal as the counter and the reference electrode, and cycled in the range of 0.02-3.0 V at a current density of 75 mu A/cm(2). Thin films prepared at a T-s of 650 degrees C show a discharge capacity at the 20th cycle of 1100 (+/- 10) mAh/g, which exhibited excellent capacity retention with a small capacity fade.
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页码:4301 / 4306
页数:6
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