Hierarchical and lamellar porous carbon as interconnected sulfur host and polysulfide-proof interlayer for Li–S batteries
Peifan Wang,
Xin Dai,
Peng Xu,
Sijiang Hu,
Xuyang Xiong,
Kunyang Zou,
Shengwu Guo,
Junjie Sun,
Chaofeng Zhang,
Yongning Liu,
Tengfei Zhou,
Yuanzhen Chen
Affiliations
Peifan Wang
The State Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering, Xi'an Jiaotong University, Xi'an 710049, PR China
Xin Dai
The State Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering, Xi'an Jiaotong University, Xi'an 710049, PR China
Peng Xu
Technical Monitoring Center, Petro China Changqing Oil Field Company, Xi'an, 710018, PR China
Sijiang Hu
Guangxi Key Laboratory of Low Carbon Energy Material, Guangxi Normal University, Guilin, 541004, China
Xuyang Xiong
Institutes of Physical Science and Information Technology, Anhui University, Hefei, 230601, PR China
Kunyang Zou
The State Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering, Xi'an Jiaotong University, Xi'an 710049, PR China
Shengwu Guo
The State Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering, Xi'an Jiaotong University, Xi'an 710049, PR China
Junjie Sun
The State Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering, Xi'an Jiaotong University, Xi'an 710049, PR China
Chaofeng Zhang
Institutes of Physical Science and Information Technology, Anhui University, Hefei, 230601, PR China
Yongning Liu
The State Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering, Xi'an Jiaotong University, Xi'an 710049, PR China
Tengfei Zhou
Institutes of Physical Science and Information Technology, Anhui University, Hefei, 230601, PR China; Corresponding authors.
Yuanzhen Chen
The State Key Laboratory for Mechanical Behavior of Materials, School of Materials Science and Engineering, Xi'an Jiaotong University, Xi'an 710049, PR China; Corresponding authors.
A robust three-dimensional (3D) interconnected sulfur host and a polysulfide-proof interlayer are key components in high-performance Li–S batteries. Herein, cellulose-based 3D hierarchical porous carbon (HPC) and two-dimensional (2D) lamellar porous carbon (LPC) are employed as the sulfur host and polysulfide-proof interlayer, respectively, for a Li–S battery. The 3D HPC displays a cross-linked macroporous structure, which allows high sulfur loading and restriction capability and provides unobstructed electrolyte diffusion channels. With a stackable carbon sheet of 2D LPC that has a large plane view size and is ultrathin and porous, the LPC-coated separator effectively inhibits polysulfides. An optimized combination of the HPC and LPC yields an electrode structure that effectively protects the lithium anode against corrosion by polysulfides, giving the cell a high capacity of 1339.4 mAh g−1 and high stability, with a capacity decay rate of 0.021% per cycle at 0.2C. This work provides a new understanding of biomaterials and offers a novel strategy to improve the performance of Li–S batteries for practical applications.
