TY - JOUR
T1 - Flexible S/DPAN/KB Nanofiber Composite as Binder-Free Cathodes for Li-S Batteries
AU - Bakenov, Zhumabay
AU - Mentbayeva, Almagul
AU - Kalybekkyzy, Sandugash
AU - Zhang, Yongguang
PY - 2019/1/23
Y1 - 2019/1/23
N2 - Sulfur/dehydrogenated polyacrylonitrile/ketjen black (S/DPAN/KB) flexible nanofiber composite was prepared by electrospinning technique and tested as a freestanding cathode for high-performance flexible lithium/sulfur batteries. S/PAN/KB was dehydrogenated at 300◦C without carbonizing and used as a cathode without any binder/current collector. The SEM observations of the obtained S/DPAN/KB nanofibers showed that the fiber diameters were in a range of 300–600 nm and the sample had a rough surface due to the presence of the S/KB particles. According to the SEM/EDS analysis sulfur is uniformly distributed within PAN fibers in both S/PAN/KB and S/DPAN/KB (heat treated) composites. The prepared binder-free S/DPAN/KB composite cathode exhibited a good electrochemical performance delivering a reversible capacity of 917 mAh g−1 after 150 cycles, exhibiting a coulombic efficiency about 100%, and demonstrating stable cyclability and good rate capability with a reversible capacity of 342 mA h g−1 at 1 C. The obtained composite cathode is highly flexible and can be used for LIB powering flexible electronic devices.
AB - Sulfur/dehydrogenated polyacrylonitrile/ketjen black (S/DPAN/KB) flexible nanofiber composite was prepared by electrospinning technique and tested as a freestanding cathode for high-performance flexible lithium/sulfur batteries. S/PAN/KB was dehydrogenated at 300◦C without carbonizing and used as a cathode without any binder/current collector. The SEM observations of the obtained S/DPAN/KB nanofibers showed that the fiber diameters were in a range of 300–600 nm and the sample had a rough surface due to the presence of the S/KB particles. According to the SEM/EDS analysis sulfur is uniformly distributed within PAN fibers in both S/PAN/KB and S/DPAN/KB (heat treated) composites. The prepared binder-free S/DPAN/KB composite cathode exhibited a good electrochemical performance delivering a reversible capacity of 917 mAh g−1 after 150 cycles, exhibiting a coulombic efficiency about 100%, and demonstrating stable cyclability and good rate capability with a reversible capacity of 342 mA h g−1 at 1 C. The obtained composite cathode is highly flexible and can be used for LIB powering flexible electronic devices.
KW - Batteries - Lithium
KW - electrospinning method
KW - freestanding sulfur cathode
KW - lithium-sulfur battery
UR - http://jes.ecsdl.org/content/166/3/A5396.full
U2 - 10.1149/2.0571903jes
DO - 10.1149/2.0571903jes
M3 - Article
SN - 0013-4651
VL - 166
SP - A5396-A5402
JO - Journal of the Electrochemical Society
JF - Journal of the Electrochemical Society
IS - 3
ER -