Preparation of PTFE/Ketjen Black-C flexible composites by high energy ball milling method and its electrochemical application

Chong Yan; Xiangnan Li; Zhaoxia Cao; Shuanbao Tian; Yanhong Yin; Shuting Yang

doi:10.13801/j.cnki.fhclxb.20151209.002

Preparation of PTFE/Ketjen Black-C flexible composites by high energy ball milling method and its electrochemical application

Chong Yan, Xiangnan Li, Zhaoxia Cao, Shuanbao Tian, Yanhong Yin, Shuting Yang^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

2 Citations (Scopus)

Abstract

A lithium-sulfur battery interlayer flexible material composed of precursor carbon material was prepared by multi-step temperature carbonization process with lotus-leaf as the raw material, ball-milling blending and vacuum filtrating precursor carbon material, Ketjen Black (KB) as well as polytetrafluo-roethylene (PTFE) at the mass ratio of 2:2:3. The porous structure of PTFE/KB-C composites can not only provide a large number of three-phase reaction sites for further reduction of higher-order sulfide Li₂S_n (4≤n≤8), but also suppress the shuttle effect of soluble polysulphide by good multilayer porous chemical adsorption effect of PTFE/KB-C composites. The lithium-sulfur battery capacity property test characterization of interlayer with pure sulfur as the anode material shows that initial discharge specific capacity is as high as 1350 mAh·g^-1 at 1.0 C rate (current density is 1675 mA·g^-1) and remains 960 mAh·g^-1 after 100 charge-discharge cycles without nitric acid lithium additives. Coulomb efficiency above 95% is achieved, demonstrating high performance of cycle stability.

Original language	English
Pages (from-to)	2390-2396
Number of pages	7
Journal	Fuhe Cailiao Xuebao/Acta Materiae Compositae Sinica
Volume	33
Issue number	10
DOIs	https://doi.org/10.13801/j.cnki.fhclxb.20151209.002
Publication status	Published - 1 Oct 2016
Externally published	Yes

Keywords

Anode
Interlayer
Lithium-sulfur battery
Lotus-leaf
Shuttle effect

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10.13801/j.cnki.fhclxb.20151209.002

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title = "Preparation of PTFE/Ketjen Black-C flexible composites by high energy ball milling method and its electrochemical application",

abstract = "A lithium-sulfur battery interlayer flexible material composed of precursor carbon material was prepared by multi-step temperature carbonization process with lotus-leaf as the raw material, ball-milling blending and vacuum filtrating precursor carbon material, Ketjen Black (KB) as well as polytetrafluo-roethylene (PTFE) at the mass ratio of 2:2:3. The porous structure of PTFE/KB-C composites can not only provide a large number of three-phase reaction sites for further reduction of higher-order sulfide Li2Sn (4≤n≤8), but also suppress the shuttle effect of soluble polysulphide by good multilayer porous chemical adsorption effect of PTFE/KB-C composites. The lithium-sulfur battery capacity property test characterization of interlayer with pure sulfur as the anode material shows that initial discharge specific capacity is as high as 1350 mAh·g-1 at 1.0 C rate (current density is 1675 mA·g-1) and remains 960 mAh·g-1 after 100 charge-discharge cycles without nitric acid lithium additives. Coulomb efficiency above 95% is achieved, demonstrating high performance of cycle stability.",

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author = "Chong Yan and Xiangnan Li and Zhaoxia Cao and Shuanbao Tian and Yanhong Yin and Shuting Yang",

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AU - Yan, Chong

AU - Li, Xiangnan

AU - Cao, Zhaoxia

AU - Tian, Shuanbao

AU - Yin, Yanhong

AU - Yang, Shuting

PY - 2016/10/1

Y1 - 2016/10/1

N2 - A lithium-sulfur battery interlayer flexible material composed of precursor carbon material was prepared by multi-step temperature carbonization process with lotus-leaf as the raw material, ball-milling blending and vacuum filtrating precursor carbon material, Ketjen Black (KB) as well as polytetrafluo-roethylene (PTFE) at the mass ratio of 2:2:3. The porous structure of PTFE/KB-C composites can not only provide a large number of three-phase reaction sites for further reduction of higher-order sulfide Li2Sn (4≤n≤8), but also suppress the shuttle effect of soluble polysulphide by good multilayer porous chemical adsorption effect of PTFE/KB-C composites. The lithium-sulfur battery capacity property test characterization of interlayer with pure sulfur as the anode material shows that initial discharge specific capacity is as high as 1350 mAh·g-1 at 1.0 C rate (current density is 1675 mA·g-1) and remains 960 mAh·g-1 after 100 charge-discharge cycles without nitric acid lithium additives. Coulomb efficiency above 95% is achieved, demonstrating high performance of cycle stability.

AB - A lithium-sulfur battery interlayer flexible material composed of precursor carbon material was prepared by multi-step temperature carbonization process with lotus-leaf as the raw material, ball-milling blending and vacuum filtrating precursor carbon material, Ketjen Black (KB) as well as polytetrafluo-roethylene (PTFE) at the mass ratio of 2:2:3. The porous structure of PTFE/KB-C composites can not only provide a large number of three-phase reaction sites for further reduction of higher-order sulfide Li2Sn (4≤n≤8), but also suppress the shuttle effect of soluble polysulphide by good multilayer porous chemical adsorption effect of PTFE/KB-C composites. The lithium-sulfur battery capacity property test characterization of interlayer with pure sulfur as the anode material shows that initial discharge specific capacity is as high as 1350 mAh·g-1 at 1.0 C rate (current density is 1675 mA·g-1) and remains 960 mAh·g-1 after 100 charge-discharge cycles without nitric acid lithium additives. Coulomb efficiency above 95% is achieved, demonstrating high performance of cycle stability.

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KW - Lithium-sulfur battery

KW - Lotus-leaf

KW - Shuttle effect

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Preparation of PTFE/Ketjen Black-C flexible composites by high energy ball milling method and its electrochemical application

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Keywords

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