Net-Structured Filter of Co(OH)2-Anchored Carbon Nanofibers with Ketjen Black for High Performance Li-S Batteries

Yuebin Yang; Leiting Zhang; Hui Xu; Xusong Qin; Yuanfu Deng; Guohua Chen

doi:10.1021/acssuschemeng.8b04468

Net-Structured Filter of Co(OH)₂-Anchored Carbon Nanofibers with Ketjen Black for High Performance Li-S Batteries

Yuebin Yang, Leiting Zhang, Hui Xu, Xusong Qin, Yuanfu Deng, Guohua Chen

Research output: Journal article publication › Journal article › Academic research › peer-review

25 Citations (Scopus)

Abstract

Lithium sulfur batteries have been extensively explored in recent years owing to their high theoretical energy density (-2600 Wh kg^-1), environmental benignity, and low cost of raw materials. Besides the advanced sulfur cathode, various functional separators/interlayers are also being developed as the effective inhibitor of polysulfide diffusion. In this study, Co(OH)₂-anchored carbon nanofibers (CNFs) with Ketjen black (KB) dispersed in the void were designed as a dense net-like structure (denoted as Co(OH)₂@CNF/KB), which was coated at the surface of a typical commercial separator to help inhibit polysulfide migration. It was demonstrated that the Co(OH)₂@CNF/KB-modified separator could effectively increase the charge transfer of the cathode material, trap the dissolved polysulfides, and help to reuse the sequestered active material. As a result, the cell employing this functionalized separator and unmodified sulfur-based electrode exhibits an initial specific capacity of 1394 mA h g^-1 at 0.1 C, which converts to 84% utilization of sulfur, and a capacity decay of 0.10% per cycle at 2 C for over 450 cycles. The unique design of Co(OH)₂@CNF/KB provides a promising modifying approach for future lithium batteries.

Original language	English
Pages (from-to)	17099-17107
Number of pages	9
Journal	ACS Sustainable Chemistry and Engineering
Volume	6
Issue number	12
DOIs	https://doi.org/10.1021/acssuschemeng.8b04468
Publication status	Published - 3 Dec 2018

Keywords

Carbon nanofibers
Co(OH)
Electrochemical properties
Interlayer
Lithium sulfur batteries

ASJC Scopus subject areas

General Chemistry
Environmental Chemistry
General Chemical Engineering
Renewable Energy, Sustainability and the Environment

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

More information

10.1021/acssuschemeng.8b04468

Cite this

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title = "Net-Structured Filter of Co(OH)2-Anchored Carbon Nanofibers with Ketjen Black for High Performance Li-S Batteries",

abstract = "Lithium sulfur batteries have been extensively explored in recent years owing to their high theoretical energy density (-2600 Wh kg-1), environmental benignity, and low cost of raw materials. Besides the advanced sulfur cathode, various functional separators/interlayers are also being developed as the effective inhibitor of polysulfide diffusion. In this study, Co(OH)2-anchored carbon nanofibers (CNFs) with Ketjen black (KB) dispersed in the void were designed as a dense net-like structure (denoted as Co(OH)2@CNF/KB), which was coated at the surface of a typical commercial separator to help inhibit polysulfide migration. It was demonstrated that the Co(OH)2@CNF/KB-modified separator could effectively increase the charge transfer of the cathode material, trap the dissolved polysulfides, and help to reuse the sequestered active material. As a result, the cell employing this functionalized separator and unmodified sulfur-based electrode exhibits an initial specific capacity of 1394 mA h g-1 at 0.1 C, which converts to 84% utilization of sulfur, and a capacity decay of 0.10% per cycle at 2 C for over 450 cycles. The unique design of Co(OH)2@CNF/KB provides a promising modifying approach for future lithium batteries.",

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author = "Yuebin Yang and Leiting Zhang and Hui Xu and Xusong Qin and Yuanfu Deng and Guohua Chen",

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T1 - Net-Structured Filter of Co(OH)2-Anchored Carbon Nanofibers with Ketjen Black for High Performance Li-S Batteries

AU - Yang, Yuebin

AU - Zhang, Leiting

AU - Xu, Hui

AU - Qin, Xusong

AU - Deng, Yuanfu

AU - Chen, Guohua

PY - 2018/12/3

Y1 - 2018/12/3

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AB - Lithium sulfur batteries have been extensively explored in recent years owing to their high theoretical energy density (-2600 Wh kg-1), environmental benignity, and low cost of raw materials. Besides the advanced sulfur cathode, various functional separators/interlayers are also being developed as the effective inhibitor of polysulfide diffusion. In this study, Co(OH)2-anchored carbon nanofibers (CNFs) with Ketjen black (KB) dispersed in the void were designed as a dense net-like structure (denoted as Co(OH)2@CNF/KB), which was coated at the surface of a typical commercial separator to help inhibit polysulfide migration. It was demonstrated that the Co(OH)2@CNF/KB-modified separator could effectively increase the charge transfer of the cathode material, trap the dissolved polysulfides, and help to reuse the sequestered active material. As a result, the cell employing this functionalized separator and unmodified sulfur-based electrode exhibits an initial specific capacity of 1394 mA h g-1 at 0.1 C, which converts to 84% utilization of sulfur, and a capacity decay of 0.10% per cycle at 2 C for over 450 cycles. The unique design of Co(OH)2@CNF/KB provides a promising modifying approach for future lithium batteries.

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