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Nanomaterials 2017, 7(9), 260; doi:10.3390/nano7090260

Biomass Waste Inspired Highly Porous Carbon for High Performance Lithium/Sulfur Batteries

School of Materials Science & Engineering, Research Institute for Energy Equipment Materials, Tianjin Key Laboratory of Materials Laminating Fabrication and Interface Control Technology, Hebei University of Technology, Tianjin 300130, China
Synergy Innovation Institute of GDUT, Heyuan 517000, Guangdong, China
Institute of Batteries LLC, 53 Kabanbay Batyr Avenue, Astana 010000, Kazakhstan
PI National Laboratory Astana, School of Engineering, Nazarbayev University, 53 Kabanbay Batyr Avenue, Astana 010000, Kazakhstan
Authors to whom correspondence should be addressed.
Received: 30 July 2017 / Revised: 27 August 2017 / Accepted: 1 September 2017 / Published: 6 September 2017
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The synthesis of highly porous carbon (HPC) materials from poplar catkin by KOH chemical activation and hydrothermal carbonization as a conductive additive to a lithium-sulfur cathode is reported. Elemental sulfur was composited with as-prepared HPC through a melt diffusion method to form a S/HPC nanocomposite. Structure and morphology characterization revealed a hierarchically sponge-like structure of HPC with high pore volume (0.62 cm3∙g−1) and large specific surface area (1261.7 m2∙g−1). When tested in Li/S batteries, the resulting compound demonstrated excellent cycling stability, delivering a second-specific capacity of 1154 mAh∙g−1 as well as presenting 74% retention of value after 100 cycles at 0.1 C. Therefore, the porous structure of HPC plays an important role in enhancing electrochemical properties, which provides conditions for effective charge transfer and effective trapping of soluble polysulfide intermediates, and remarkably improves the electrochemical performance of S/HPC composite cathodes. View Full-Text
Keywords: lithium/sulfur battery; cathode; sulfur/highly porous carbon composite; poplar catkin lithium/sulfur battery; cathode; sulfur/highly porous carbon composite; poplar catkin

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Zhao, Y.; Ren, J.; Tan, T.; Babaa, M.-R.; Bakenov, Z.; Liu, N.; Zhang, Y. Biomass Waste Inspired Highly Porous Carbon for High Performance Lithium/Sulfur Batteries. Nanomaterials 2017, 7, 260.

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