Journal
CHEMICAL ENGINEERING JOURNAL
Volume 338, Issue -, Pages 126-136Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2018.01.032
Keywords
Silicon oxycarbide; Silicone oil; Sodium ion battery; Anode; Pyrolysis
Categories
Funding
- National Research Foundation of Korea (NRF) grant - Korean government (MSIP) [NRF-2016R1A2B3008800]
Ask authors/readers for more resources
Sodium ion batteries (NIBs) have gained considerable attention for large-scale energy storage applications because of the lower cost and higher abundance of Na than Li. In this study, we demonstrate that silicon oxycarbides (SiOCs), in which free carbon phases are imbedded in amorphous glassy SiOxCy phases, can be promising candidates as anodes for NIBs. The SiOC samples were synthesized by the pyrolysis of low-cost silicone oil in a H-2/Ar flow condition. When tested as an anode in NIBs, the SiOC sample calcined at 900 degrees C exhibited an excellent reversible capacity of 160 mAh g(-1) at 25 mA g(-1) after 200 cycles and a high rate performance of 62 mAh g(-1) at 800 mA g(-1). More importantly, the SiOC electrode exhibited an excellent long-term cycling performance of 0.09 mAh g(-1) decay per cycle for 650 cycles. The electrochemical properties of SiOC in an NIB were compared with those in an LIB to gain an insight into its ion storage mechanism. The effects of calcination temperature, calcination time, and ball milling time on the physicochemical and electrochemical properties of the SiOC electrode are discussed.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available