TY - JOUR
T1 - An ant-nest-like cathode substrate for lithium-sulfur batteries with practical cell fabrication parameters
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 Sciences and Engineering under Award no. DE-SC0005397 . One of the authors (R.Y.) thanks the China Scholarship Council (Grant no. 201706340107 ) for the award of a fellowship.
Funding Information:
This work was supported by the U.S. Department of Energy, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering under Award no. DE-SC0005397. One of the authors (R.Y.) thanks the China Scholarship Council (Grant no. 201706340107) for the award of a fellowship.
Publisher Copyright:
© 2018 Elsevier B.V.
PY - 2019/3/1
Y1 - 2019/3/1
N2 - Electrochemical performances of lithium-sulfur batteries have received much progress in recent years. However, their practical deployment encounters challenges with respect to optimizing the cell-fabrication parameters (e.g., amounts of the active material and electrolyte). We present here an “ant-nest-like” cathode substrate with unique architecture to synchronously attain high electrochemical performance and necessary cell-fabrication parameters. The cells with a high sulfur loading (11.5 mg cm−2), a high sulfur content (75 wt%), and a low electrolyte/sulfur ratio (9 μL mg−1) display a high areal capacity and energy density of, respectively, 7 mA h cm−2 and 14 mW h cm−2 with a capacity retention of 70% after 150 cycles. Moreover, the cells exhibit a low self-discharge behavior with a low self-discharge constant of 0.0013 per day and a long rest period of one month. These dynamic and static electrochemical stabilities are attributed to the ant-nest-like structure and low surface area of the cathode substrate that allows, respectively, the accommodation and encapsulation of a high amount of active material and reduces the consumption of electrolyte.
AB - Electrochemical performances of lithium-sulfur batteries have received much progress in recent years. However, their practical deployment encounters challenges with respect to optimizing the cell-fabrication parameters (e.g., amounts of the active material and electrolyte). We present here an “ant-nest-like” cathode substrate with unique architecture to synchronously attain high electrochemical performance and necessary cell-fabrication parameters. The cells with a high sulfur loading (11.5 mg cm−2), a high sulfur content (75 wt%), and a low electrolyte/sulfur ratio (9 μL mg−1) display a high areal capacity and energy density of, respectively, 7 mA h cm−2 and 14 mW h cm−2 with a capacity retention of 70% after 150 cycles. Moreover, the cells exhibit a low self-discharge behavior with a low self-discharge constant of 0.0013 per day and a long rest period of one month. These dynamic and static electrochemical stabilities are attributed to the ant-nest-like structure and low surface area of the cathode substrate that allows, respectively, the accommodation and encapsulation of a high amount of active material and reduces the consumption of electrolyte.
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U2 - 10.1016/j.ensm.2018.12.025
DO - 10.1016/j.ensm.2018.12.025
M3 - Article
AN - SCOPUS:85059340528
VL - 18
SP - 491
EP - 499
JO - Energy Storage Materials
JF - Energy Storage Materials
SN - 2405-8297
ER -