期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 2, 期 36, 页码 15044-15051出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4ta00694a
关键词
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资金
- European Commission [227541]
- Research Council of Norway [2000030/s60]
- Department of Chemistry, University of Oslo
Atomic layer deposition (ALD) has been used to prepare nano-structured cathode films for Li-ion batteries of V2O5 from VO(thd)(2) and ozone at 215 degrees C. The resulting films were strongly textured and rough without application of a template. The best electrochemical performance was observed for 10 nm nano-structured V2O5, that could sustain discharge rates up to 960 C while maintaining 20% of the initial 1 C capacity. The optimized cathode endured a discharge rate of 120 C for more than 1500 cycles while maintaining more than 80% of capacity, proving the rare combination of both high discharge rates and long life time simultaneously. The growth mechanism of the VO(thd)(2) and ozone provides a highly textured surface consisting of platelets of V2O5 providing a large contact area towards the electrolyte. The current V2O5 films show potential as cathodes in thin film micro batteries.
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