期刊
ACS APPLIED ENERGY MATERIALS
卷 2, 期 2, 页码 1185-1191出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsaem.8b01734
关键词
carbon fiber; pyroprotein; hard carbon; anode; sodium-ion batteries
资金
- Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Education [NRF-2017R1C1B1004167, NRF-2018R1A4A1025169]
- Kangwon National University [620170041]
In this study, low-density, hard-carbon fibers incorporating multitudinous closed pores with few-nanometer-scale widths were prepared from waste silk fabric by a simple high-temperature heating process (2000 degrees C). The pyroprotein carbon fibers exhibited a significantly high single-plateau capacity of 300 mA h g(-1) at similar to 0.1 V Na+/Na, a high initial Coulombic efficiency of, similar to 91.9%, and stable cycling behaviors of more than 200 cycles when used as the anode of a sodium ion battery. Characterization using in situ X-ray diffraction patterns and ex situ field-emission transmission electron microscopy confirmed that the outstanding charge storage behaviors of the pyroprotein carbon fibers are based on sodium-metal nanoclustering in the closed pores. Moreover, full cells assembled with the pyroprotein carbon-fiber-based anode and a reported cathode demonstrated their practical electrochemical performances, including a specific energy of 262 Wh kg(-1).
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