Freestanding 1T MoS2/graphene heterostructures as a highly efficient electrocatalyst for lithium polysulfides in Li–S batteries
Abstract
A new method to effectively suppress the “polysulfide shuttle” in Li–S batteries is presented by designing a freestanding, three-dimensional graphene/1T MoS2 (3DG/TM) heterostructure with highly efficient electrocatalysis properties for lithium polysulfides (LiPSs). The 3DG/TM heterostructure is constructed by few-layered graphene nanosheets sandwiched by hydrophilic, metallic, few-layered 1T MoS2 nanosheets with abundant active sites. The porous 3D structure and the hydrophilic feature of 1T-MoS2 are beneficial for electrolyte penetration and Li-ion transfer, and the high conductivities of both graphene and the 1T MoS2 nanosheets facilitate electron transfer. These merits lead to a high electrocatalytic efficiency for LiPSs due to excellent ion/electron transfer and the presence of sufficient electrocatalytic active sites. Thus, the cells with 3DG/TM exhibit outstanding electrochemical performance, with a high reversible discharge capacity of 1181 mA h g-1 and a capacity retention of 96.3% after 200 cycles. The electrocatalysis mechanism of LiPSs is further experimentally and theoretically revealed, which provides new insights and opportunities to develop advanced Li–S batteries with highly efficient electrocatalysts for LiPS conversion.
- Authors:
-
[2];
[3];
[4]
- Univ. of Texas, Austin, TX (United States). Materials Science and Engineering Program; Univ. of Texas, Austin, TX (United States). Texas Materials Inst. (TMI); Univ. of Electronic Science and Technology of China, Chengdu (China)
- Univ. of Texas, Austin, TX (United States). McKetta Dept. of Chemical Engineering
- Univ. of Electronic Science and Technology of China, Chengdu (China)
- Univ. of Texas, Austin, TX (United States). Materials Science and Engineering Program; Univ. of Texas, Austin, TX (United States). Texas Materials Inst. (TMI)
- Publication Date:
- Research Org.:
- Univ. of Texas, Austin, TX (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division; National Natural Science Foundation of China (NSFC)
- OSTI Identifier:
- 1598201
- Alternate Identifier(s):
- OSTI ID: 1485180
- Grant/Contract Number:
- SC0005397
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Energy & Environmental Science
- Additional Journal Information:
- Journal Volume: 12; Journal Issue: 1; Journal ID: ISSN 1754-5692
- Publisher:
- Royal Society of Chemistry
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 25 ENERGY STORAGE
Citation Formats
He, Jiarui, Hartmann, Gregory, Lee, Myungsuk, Hwang, Gyeong S., Chen, Yuanfu, and Manthiram, Arumugam. Freestanding 1T MoS2/graphene heterostructures as a highly efficient electrocatalyst for lithium polysulfides in Li–S batteries. United States: N. p., 2018.
Web. doi:10.1039/C8EE03252A.
He, Jiarui, Hartmann, Gregory, Lee, Myungsuk, Hwang, Gyeong S., Chen, Yuanfu, & Manthiram, Arumugam. Freestanding 1T MoS2/graphene heterostructures as a highly efficient electrocatalyst for lithium polysulfides in Li–S batteries. United States. https://doi.org/10.1039/C8EE03252A
He, Jiarui, Hartmann, Gregory, Lee, Myungsuk, Hwang, Gyeong S., Chen, Yuanfu, and Manthiram, Arumugam. Tue .
"Freestanding 1T MoS2/graphene heterostructures as a highly efficient electrocatalyst for lithium polysulfides in Li–S batteries". United States. https://doi.org/10.1039/C8EE03252A. https://www.osti.gov/servlets/purl/1598201.
@article{osti_1598201,
title = {Freestanding 1T MoS2/graphene heterostructures as a highly efficient electrocatalyst for lithium polysulfides in Li–S batteries},
author = {He, Jiarui and Hartmann, Gregory and Lee, Myungsuk and Hwang, Gyeong S. and Chen, Yuanfu and Manthiram, Arumugam},
abstractNote = {A new method to effectively suppress the “polysulfide shuttle” in Li–S batteries is presented by designing a freestanding, three-dimensional graphene/1T MoS2 (3DG/TM) heterostructure with highly efficient electrocatalysis properties for lithium polysulfides (LiPSs). The 3DG/TM heterostructure is constructed by few-layered graphene nanosheets sandwiched by hydrophilic, metallic, few-layered 1T MoS2 nanosheets with abundant active sites. The porous 3D structure and the hydrophilic feature of 1T-MoS2 are beneficial for electrolyte penetration and Li-ion transfer, and the high conductivities of both graphene and the 1T MoS2 nanosheets facilitate electron transfer. These merits lead to a high electrocatalytic efficiency for LiPSs due to excellent ion/electron transfer and the presence of sufficient electrocatalytic active sites. Thus, the cells with 3DG/TM exhibit outstanding electrochemical performance, with a high reversible discharge capacity of 1181 mA h g-1 and a capacity retention of 96.3% after 200 cycles. The electrocatalysis mechanism of LiPSs is further experimentally and theoretically revealed, which provides new insights and opportunities to develop advanced Li–S batteries with highly efficient electrocatalysts for LiPS conversion.},
doi = {10.1039/C8EE03252A},
journal = {Energy & Environmental Science},
number = 1,
volume = 12,
place = {United States},
year = {Tue Nov 27 00:00:00 EST 2018},
month = {Tue Nov 27 00:00:00 EST 2018}
}
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