| INORGANIC MATERIALS AND CERAMIC MATRIX COMPOSITES |
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| Three-dimensional Porous PC/CNT Interlayer for High Performance Lithium-Sulfur Batteries |
| LI Rui, SUN Xiaogang, HUANG Yapan, WEI Chengcheng, LIANG Guodong, ZOU Jingyi, XU Yuhao, HE Qiang
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| School of Mechanical Engineering, Nanchang University, Nanchang 330031, China |
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Abstract In order to inhibit the dissolution and diffusion of polysulphides and improve the electrochemical properties of lithium-sulfur (Li-S) batteries, the porous carbon nanosheets (PC) and multi-walled carbon nanotubes (MWCNTs) were combined to form a novel three-dimensional porous carbon nanosheet (PC/CNT) interlayer to capture soluble polysulfides. MWCNTs provide efficient conductive channels and maintain the integrity of the cathode structure; One-dimensional MWCNTs and two-dimensional porous carbon nanosheets form a three-dimensional interconnected structure that facilitates rapid electrical/ion transmission. The structures and properties were characterized by transmission electron microscopy (TEM) and scanning electron microscopy (SEM). The electrochemical test results show that the first discharge capacity of PC/CNT interlayer high performance Li-S battery reached 1 311 mAh/g at 0.05C rate, and the utilization rate of active material was as high as 78.8%. After 5 cycles at 2C rate, the discharge specific capacity still reached 941 mAh/g, which was 71.8% of the first specific capacity, and the coulomb efficiency remained at 96%,showing good rate and cycle performance.
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Published: 24 July 2020
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| Fund:The work was financially supported by the Jiangxi Scientific Fund (20142BBE50071) and Jiangxi Education Fund (KJLD13006). |
About author:: Rui Liis currently a master student in the School of Mechanical Engineering, Nanchang University, under the supervision of Prof.Xiaogang Sun. His current research interests focus on lithium-sulfur batteries and lithium-ion batteries.
Xiaogang Sunreceived his B.S.and M.S. degrees from Nanchang University in 1982 and 1987, respectively. His research activity focuses on nanomaterials and lithium-ion batteries. He has published over 30 papers in international journals and been awarded 8 patents. |
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2020, Vol. 34 
