期刊
JOURNAL OF POWER SOURCES
卷 164, 期 1, 页码 372-378出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2006.09.109
关键词
nano-crystalline LiMn2O4 thin film; pulsed laser deposition; capacity; charge/discharge; stability
LiMn2O4 thin films with nano-crystals less than 100 nm were successfully grown on polished stainless steel substrates at 400 degrees C and 200 m Torr of oxygen by pulsed laser deposition. A maximum discharge capacity of 62.4 mu Ah cm(-2) mu m(-1) cycled between 3.0 and 4.5 V with a current density of 20 mu Ah cm(-2) was achieved. The effect of several overdischarge cycles was negligible, and both the effect of Jahn-Teller distortion at low potentials on capacity loss and structure instability at high potentials were effectively inhibited in this nano-crystalline film, resulting in an excellent cycling stability with a very low fading rate of capacity up to 500 cycles at 55 degrees C. (c) 2006 Elsevier B.V. All rights reserved.
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