TY - JOUR
T1 - A core-shell cathode substrate for developing high-loading, high-performance lithium-sulfur batteries
AU - Yu, Ran
AU - Chung, Sheng Heng
AU - Chen, Chun Hua
AU - Manthiram, Arumugam
N1 - Funding Information:
This work was supported by the U.S. Department of Energy, Office of Basic Energy Sciences, Division of Materials Science and Engineering under award number DE-SC0005397. One of the authors (R. Y.) thanks the China Scholarship Council (Grant No. 201706340107) for the award of a fellowship.
PY - 2018/1/1
Y1 - 2018/1/1
N2 -
Lithium-sulfur batteries with a high theoretical energy density would be a promising next-generation energy-storage system if their cell-fabrication parameters (e.g., sulfur loading/content and the electrolyte/sulfur ratio) are improved to a practically necessary level. Herein, we report the design of a three-dimensional core-shell carbon substrate, integrating a porous internal core with a conductive external carbon nanofiber shell. Such a carbon substrate encapsulates a high amount of sulfur as the active material core to form a high-loading core-shell cathode, attaining an ultra-high sulfur loading and content of, respectively, 23 mg cm
−2
and 75 wt%. With distinguishable internal and external regions, the carbon substrate facilitates the redox reactions and hinders the polysulfide diffusion. Thus, the core-shell cathodes exhibit a high areal capacity and energy density of, respectively, 14 mA h cm
−2
and 27 mW h cm
−2
during cycling. During resting, they achieve a long shelf-life of one month with a low capacity-fade rate of 0.25% per day.
AB -
Lithium-sulfur batteries with a high theoretical energy density would be a promising next-generation energy-storage system if their cell-fabrication parameters (e.g., sulfur loading/content and the electrolyte/sulfur ratio) are improved to a practically necessary level. Herein, we report the design of a three-dimensional core-shell carbon substrate, integrating a porous internal core with a conductive external carbon nanofiber shell. Such a carbon substrate encapsulates a high amount of sulfur as the active material core to form a high-loading core-shell cathode, attaining an ultra-high sulfur loading and content of, respectively, 23 mg cm
−2
and 75 wt%. With distinguishable internal and external regions, the carbon substrate facilitates the redox reactions and hinders the polysulfide diffusion. Thus, the core-shell cathodes exhibit a high areal capacity and energy density of, respectively, 14 mA h cm
−2
and 27 mW h cm
−2
during cycling. During resting, they achieve a long shelf-life of one month with a low capacity-fade rate of 0.25% per day.
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U2 - 10.1039/C8TA09059A
DO - 10.1039/C8TA09059A
M3 - Article
AN - SCOPUS:85058378056
VL - 6
SP - 24841
EP - 24847
JO - Journal of Materials Chemistry A
JF - Journal of Materials Chemistry A
SN - 2050-7488
IS - 48
ER -