TY - JOUR
T1 - Facile and scalable fabrication of high-energy-density sulfur cathodes for pragmatic lithium-sulfur batteries
AU - Kim, Min Seop
AU - Kim, Mun Sek
AU - Do, Vandung
AU - Xia, Yongyao
AU - Kim, Woong
AU - Cho, Won Il
N1 - Funding Information:
This work was supported by the National Research Foundation (NRF) of Korea (NRF-2016M1B3A1A01937324) and the Korea Institute of Science and Technology Institutional Program (Project No. 2E29650).
Funding Information:
This work was supported by the National Research Foundation (NRF) of Korea (NRF- 2016M1B3A1A01937324 ) and the Korea Institute of Science and Technology Institutional Program (Project No. 2E29650 ).
Publisher Copyright:
© 2019 Elsevier B.V.
PY - 2019/5/15
Y1 - 2019/5/15
N2 - Lithium-sulfur battery is garnering much of attention due to its high energy densities, low-cost active material of sulfur and variety of applications in portable electronics. High integrity and consistent qualities of the large-scale sulfur cathode with high energy have to be ensured to construct reliable and practical lithium-sulfur batteries that could supersede advancing lithium-ion batteries. Here, facile and productive approaches are developed to mass-produce functional sulfur hosts and to fabricate large-scale sulfur cathode with high sulfur loading. The functional sulfur host is synthesized by anchoring polyethylenimine at the surface of commercially available carbon at inert conditions with a scale of more than 10 g per batch via simple solution method. Combining the functionalized sulfur host with a polyacrylic acid binder allows high integrity and uniformity of the high sulfur loading cathode to be fabricated in large dimensions. Followed by this approach, the sulfur cathode, 70 × 6 cm2, is produced with the sulfur loading of >4.3 mg cm−2. It is found that 12 wt% of polyethylenimine in the functionalized sulfur host with polyacrylic acid is at optimal condition that presents stable electrochemical performances over 600 cycles.
AB - Lithium-sulfur battery is garnering much of attention due to its high energy densities, low-cost active material of sulfur and variety of applications in portable electronics. High integrity and consistent qualities of the large-scale sulfur cathode with high energy have to be ensured to construct reliable and practical lithium-sulfur batteries that could supersede advancing lithium-ion batteries. Here, facile and productive approaches are developed to mass-produce functional sulfur hosts and to fabricate large-scale sulfur cathode with high sulfur loading. The functional sulfur host is synthesized by anchoring polyethylenimine at the surface of commercially available carbon at inert conditions with a scale of more than 10 g per batch via simple solution method. Combining the functionalized sulfur host with a polyacrylic acid binder allows high integrity and uniformity of the high sulfur loading cathode to be fabricated in large dimensions. Followed by this approach, the sulfur cathode, 70 × 6 cm2, is produced with the sulfur loading of >4.3 mg cm−2. It is found that 12 wt% of polyethylenimine in the functionalized sulfur host with polyacrylic acid is at optimal condition that presents stable electrochemical performances over 600 cycles.
KW - Large-scale sulfur cathode
KW - Lithium-sulfur batteries
KW - Polar binder
KW - Surface functionalization
UR - http://www.scopus.com/inward/record.url?scp=85062893934&partnerID=8YFLogxK
U2 - 10.1016/j.jpowsour.2019.02.093
DO - 10.1016/j.jpowsour.2019.02.093
M3 - Article
AN - SCOPUS:85062893934
VL - 422
SP - 104
EP - 112
JO - Journal of Power Sources
JF - Journal of Power Sources
SN - 0378-7753
ER -