期刊
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
卷 13, 期 10, 页码 1591-1597出版社
SPRINGER
DOI: 10.1007/s10008-008-0740-y
关键词
NiO films; Foam nickel substrate; Solution immersion; High reversibility and rate capability; Lithium-ion batteries
We report the high-rate capability and good cyclability of three-dimension nanoporous NiO films as the anodes of lithium-ion batteries. The NiO films are fabricated by immersing foam nickel substrates in an 80 degrees C aqueous solution containing ammonia and potassium peroxydisulfate, and subsequent heat treatment at 500 degrees C. At a rate of 1.0 C, the film electrodes maintain a capacity of 560 mAh g(-1) as well as capacity retention of 97% after 100 discharge/charge cycles. When the current density is increased to 14C, 42% of the capacity can be retained. Owing to the ease of large-scale fabrication and superior electrochemical performance, these NiO films will be promising anodes for high-energy-density lithium-ion batteries.
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