TY - JOUR
T1 - Effect of carbon-sulphur bond in a sulphur/dehydrogenated polyacrylonitrile/reduced graphene oxide composite cathode for lithium-sulphur batteries
AU - Konarov, Aishuak
AU - Bakenov, Zhumabay
AU - Yashiro, Hitoshi
AU - Sun, Yang Kook
AU - Myung, Seung Taek
N1 - Funding Information:
The authors would like to thank Ms. Miwa Watanabe, Iwate University, for her assistance in the experimental work. This research was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF), funded by the Ministry of Education, Science and Technology of Korea (NRF-2014R1A2A1A11051197) and by the National Research Foundation of Korea funded by the Korean government (MEST) (NRF-2015M3D1A1069713). This work was also partly supported by the Human Resources Development program (No. 20154010200840) of the Korea Institute of Energy Technology Evaluation and Planning grant funded by the Korea government Ministry of Trade, Industry and Energy.
Publisher Copyright:
© 2017 Elsevier B.V.
PY - 2017
Y1 - 2017
N2 - A S/DPAN (dehydrogenated polyacrylonitrile) composite shows promising electrode performances as a cathode material for Li-S batteries though its electric conductivity is insufficient for high rate tests. In an attempt to enhance the electric conductivity, the S/DPAN composite is attached on reduced graphene oxide (rGO) sheets via self-assembling modification. As a result, the conductivity improves to ∼10−4 S cm−1, and the S/DPAN/rGO composite thereby delivers approximately 90% of the theoretical capacity of sulphur at a rate of 0.2C (0.34 A g−1) over 700 mAh (g-S)−1 even at 2C (3.4 A g−1). We first report on the C[sbnd]S bond between sulphur and DPAN in a composite that maintains the bond even after an extensive cycling test, as confirmed by time-of-flight secondary-ion mass spectroscopy (ToF-SIMS). These synergistic effects enable facile electron transport such that the S/DPAN/rGO composite electrode is able to maintain superior electrode performances.
AB - A S/DPAN (dehydrogenated polyacrylonitrile) composite shows promising electrode performances as a cathode material for Li-S batteries though its electric conductivity is insufficient for high rate tests. In an attempt to enhance the electric conductivity, the S/DPAN composite is attached on reduced graphene oxide (rGO) sheets via self-assembling modification. As a result, the conductivity improves to ∼10−4 S cm−1, and the S/DPAN/rGO composite thereby delivers approximately 90% of the theoretical capacity of sulphur at a rate of 0.2C (0.34 A g−1) over 700 mAh (g-S)−1 even at 2C (3.4 A g−1). We first report on the C[sbnd]S bond between sulphur and DPAN in a composite that maintains the bond even after an extensive cycling test, as confirmed by time-of-flight secondary-ion mass spectroscopy (ToF-SIMS). These synergistic effects enable facile electron transport such that the S/DPAN/rGO composite electrode is able to maintain superior electrode performances.
KW - Battery
KW - Cathode
KW - Dehydrogenated polyacrylonitrile
KW - Lithium
KW - Reduced graphene oxide
KW - Sulphur
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U2 - 10.1016/j.jpowsour.2017.04.063
DO - 10.1016/j.jpowsour.2017.04.063
M3 - Article
AN - SCOPUS:85018493440
SN - 0378-7753
VL - 355
SP - 140
EP - 146
JO - Journal of Power Sources
JF - Journal of Power Sources
ER -
