Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 8, Issue 14, Pages 9446-9453Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.6b01093
Keywords
freestanding; carbon nanofiber; SnOx; ZnO; electrospinning lithium ion battery
Funding
- Industrial Strategic Technology Development Program - Ministry of Knowledge Economy (MKE, Korea) [10045221]
- Global Frontier Hybrid Interface Materials (GFHIM) [NRF-2013M3A6B1078879]
- Commercializations Promotion Agency for R&D Outcomes (COMPA) - Ministry of Science, ICT and Future Planning (MISP)
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Here, we demonstrate the production of electrospun SnO, ZnO polyacrylonitrile (PAN) nanofibers (NFs) that are flexible, freestanding, and binder-free. This NF fabric is flexible and thus can be readily tailored into a coin for further cell fabrication. These properties allow volume expansion of the oxide materials and provide shortened diffusion pathways for Li ions than those achieved using the nanoparticle approach. Amorphous SnOx-ZnO particles were uniformly dispersed in the carbon NF (CNF). The SnOx-ZnO CNFs with a Sn:Zn ratio of 3:1 exhibited a superior reversible capacity of 963 mA.h.g(-1) after 55 cycles at a current density of 100 mA.g(-1), which is three times higher than the capacity of graphite-based anodes. The amorphous NFs facilitated Li2O decomposition, thereby enhancing the reversible capacity. ZnO prevented the aggregation of Sn, which, in turn, conferred stable and high discharge capacity to the cell. Overall, the SnOx-ZnO CNFs were shown to exhibit remarkably high capacity retention and high reversible and rate capacities as Li ion battery anodes.
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