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Micro-nano structure hard carbon as a high performance anode material for sodium-ion batteries

Superior first-cycle Coulomb efficiency (above 80%) is displayed by filter paper-derived micro-nano structure hard carbon, and it delivers a high reversible capacity of 286 mAh g(−1) after 100 cycles as the anode for Na-ion battery at 20 mA g(−1). These advantageous performance characteristics are a...

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Detalles Bibliográficos
Autores principales: Zheng, Peng, Liu, Ting, Guo, Shouwu
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5067775/
https://www.ncbi.nlm.nih.gov/pubmed/27752146
http://dx.doi.org/10.1038/srep35620
Descripción
Sumario:Superior first-cycle Coulomb efficiency (above 80%) is displayed by filter paper-derived micro-nano structure hard carbon, and it delivers a high reversible capacity of 286 mAh g(−1) after 100 cycles as the anode for Na-ion battery at 20 mA g(−1). These advantageous performance characteristics are attributed to the unique micro-nano structure, which reduced the first irreversible capacity loss by limiting the contact between the electrode and electrolyte, and enhanced the capacity by accelerating electron and Na-ion transfer through inter-connected nano-particles and nano-pores, respectively. The good electrochemical performance indicates that this low-cost hard carbon could be a promising anode for Na-ion batteries.