期刊
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
卷 163, 期 14, 页码 A2930-A2937出版社
ELECTROCHEMICAL SOC INC
DOI: 10.1149/2.0351614jes
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资金
- Ministero dell'Istruzione e della Ricerca Scientifica, Italy [PON03PE_00012_1]
Self-standing and flexible paper-like electrodes consisting of nano-sized Co3O4 nanoparticles encapsulated in nitrogen-doped graphite-like carbon fibers are synthesized by electrospinning followed by thermal treatment. Several studies have recently reported that encapsulating nano-sized metal oxides that display conversion reaction, such as manganese, iron and cobalt oxides, within the three-dimensional network of electrospun carbon fibers allows to remarkably improve the performances of lithium-ion batteries. In the present work, we challenge these reports with a study based on the optimization of the preparation and post-synthesis treatment parameters, and a very precise characterization of the structural, morphological and chemical properties of the composite materials leading to clear structure-electrochemical properties correlations. In particular, it is found that the electrochemical properties of a physical mixture of cobalt oxide nanoparticles and electrospun carbon nanofibers are equivalent to the ones of the electrospun nanocomposites, proving that the benefit of electrospun metal oxide-carbon nanocomposites is limited and that the enhanced properties claimed in the literature arise from imprudent comparisons. (C) 2016 The Electrochemical Society. All rights reserved.
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