Electrospun graphitic carbon nanofibers with in-situ encapsulated Co-Ni nanoparticles as freestanding electrodes for Li-O2 batteries

Jiaqiang Huang, Biao Zhang, Yu Yang Xie, Wilson Wei King Lye, Zheng Long Xu, Sara Abouali, Mohammad Akbari Garakani, Jian Qiu Huang, Tong Yi Zhang, Baoling Huang, Jang Kyo Kim

Research output: Contribution to journalArticlepeer-review

82 Scopus citations

Abstract

Binder-free, graphitic, hierarchically porous carbon nanofiber (CNF) electrodes with in-situ encapsulated Co-Ni catalysts are synthesized with electrospinning as an efficient oxygen electrode for Li-O2 batteries (LOBs). The inherently interconnected, graphitic network makes it unnecessary to include binders and carbon additives, therefore eliminating the possible side reactions from binder and facilitating the ion and electrical transport in the electrodes. The in-situ encapsulation of Co-Ni nanoparticles facilitates uniform dispersion of catalysts and prevents the catalyst aggregation after cycles. The resulting Co-Ni/CNF composite electrodes deliver competitive electrochemical performance of 8635 mAh gc-1 at a current density of 200 mA gc-1, and sustain 60 cycles with an upper-limit capacity of 1000 mAh gc-1. The strategy developed here provides insightful perspectives in designing carbon/metal hybrid electrodes for LOBs.

Original languageBritish English
Pages (from-to)329-336
Number of pages8
JournalCarbon
Volume100
DOIs
StatePublished - 1 Apr 2016

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