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Nano Research

Article Title

A hybrid carbon aerogel with both aligned and interconnected pores as interlayer for high-performance lithium–sulfur batteries

Authors

Mingkai Liu, School of Chemistry and Chemical Engineering, Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University, Xuzhou 221116, China State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, and Laboratory of Advanced Materials, Fudan University, Shanghai 200438, China
Zhibin Yang, State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, and Laboratory of Advanced Materials, Fudan University, Shanghai 200438, China
Hao Sun, State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, and Laboratory of Advanced Materials, Fudan University, Shanghai 200438, China
Chao Lai, School of Chemistry and Chemical Engineering, Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University, Xuzhou 221116, China
Xinsheng Zhao, School of Physics and Electronic Engineering, Jiangsu Normal University, Xuzhou 221116, China
Huisheng Peng, State Key Laboratory of Molecular Engineering of Polymers, Department of Macromolecular Science, and Laboratory of Advanced Materials, Fudan University, Shanghai 200438, China
Tianxi Liu, School of Chemistry and Chemical Engineering, Jiangsu Key Laboratory of Green Synthetic Chemistry for Functional Materials, Jiangsu Normal University, Xuzhou 221116, China State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, China

Keywords

lithium–sulfur battery, carbon aerogel, interlayer, aligned and interconnected pores, trapped polysulfide

Abstract

ABSTRACT The soluble nature of polysulfide species created on the sulfur electrode has severely hampered the electrochemical performance of lithium–sulfur (Li–S) batteries. Trapping and anchoring polysulfides are promising approaches for overcoming this issue. In this work, a mechanically robust, electrically conductive hybrid carbon aerogel (HCA) with aligned and interconnected pores was created and investigated as an interlayer for Li–S batteries. The hierarchical cross-linked networks constructed by graphene sheets and carbon nanotubes can act as an “internet” to capture the polysulfide, while the microand nano-pores inside the aerogel can facilitate quick penetration of the electrolyte and rapid transport of lithium ions. As advantages of the unique structure and excellent accommodation of the volume change of the active materials, a high specific capacity of 1,309 mAh·g−1 at 0.2 C was achieved for the assembled Li–S battery, coupled with good rate performance and long-term cycling stability (78% capacity retention after 600 cycles at 4 C)

Graphical Abstract

Publisher

Tsinghua University Press

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