Controlling SEI Formation on SnSb-Porous Carbon Nanofibers for Improved Na Ion Storage

Journal Article · Wed May 14 00:00:00 EDT 2014 · Advanced Materials, 26(18):2901-2908

DOI:https://doi.org/10.1002/adma.201304962· OSTI ID:1158976

Ji, Liwen; Gu, Meng; Shao, Yuyan; Li, Xiaolin; Engelhard, Mark H.; Arey, Bruce W.; Wang, Wei; Nie, Zimin; Xiao, Jie; Wang, Chong M.; Zhang, Jiguang; Liu, Jun

Porous carbon nanofiber (CNF)-supported tin-antimony (SnSb) alloys is synthesized and applied as sodium ion battery anode. The chemistry and morphology of the solid electrolyte interphase (SEI) film and its correlation with the electrode performance are studied. The addition of fluoroethylene carbonate (FEC) in electrolyte significantly reduces electrolyte decomposition and creates a very thin and uniform SEI layer on the cycled electrode surface which could promote the kinetics of Na-ion migration/transportation, leading to excellent electrochemical performance.

• Research Organization: Pacific Northwest National Lab. (PNNL), Richland, WA (United States). Environmental Molecular Sciences Lab. (EMSL)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-76RL01830
• OSTI ID: 1158976
• Report Number(s): PNNL-SA-98915; 47476; KC0203020
• Journal Information: Advanced Materials, 26(18):2901-2908, Journal Name: Advanced Materials, 26(18):2901-2908
• Country of Publication: United States
• Language: English

Related Subjects

Na-ion battery
solid electrolyte interphase (SEI) layer
fluoroethylene carbonate (FEC)
electrochemical performance
Environmental Molecular Sciences Laboratory