A high‐energy‐density long‐cycle lithium–sulfur battery enabled by 3D graphene architecture
Yan Cheng,
Bihan Liu,
Xiang Li,
Xin He,
Zhiyi Sun,
Wentao Zhang,
Ziyao Gao,
Leyuan Zhang,
Xiangxiang Chen,
Zhen Chen,
Zhuo Chen,
Lele Peng,
Xiangfeng Duan
Affiliations
Yan Cheng
Tsinghua Shenzhen International Graduate School, Institute of Materials Research Tsinghua University Shenzhen China
Bihan Liu
Department of Materials Physics and Chemistry, School of Materials Science and Engineering, Energy & Catalysis Center Beijing Institute of Technology Beijing China
Xiang Li
Tsinghua Shenzhen International Graduate School, Institute of Materials Research Tsinghua University Shenzhen China
Xin He
Tsinghua Shenzhen International Graduate School, Institute of Materials Research Tsinghua University Shenzhen China
Zhiyi Sun
Department of Materials Physics and Chemistry, School of Materials Science and Engineering, Energy & Catalysis Center Beijing Institute of Technology Beijing China
Wentao Zhang
Tsinghua Shenzhen International Graduate School, Institute of Materials Research Tsinghua University Shenzhen China
Ziyao Gao
Tsinghua Shenzhen International Graduate School, Institute of Materials Research Tsinghua University Shenzhen China
Leyuan Zhang
Department of Chemistry and Biochemistry University of California Los Angeles California USA
Xiangxiang Chen
Tsinghua Shenzhen International Graduate School, Institute of Materials Research Tsinghua University Shenzhen China
Zhen Chen
Tsinghua Shenzhen International Graduate School, Institute of Materials Research Tsinghua University Shenzhen China
Zhuo Chen
Department of Materials Physics and Chemistry, School of Materials Science and Engineering, Energy & Catalysis Center Beijing Institute of Technology Beijing China
Lele Peng
Tsinghua Shenzhen International Graduate School, Institute of Materials Research Tsinghua University Shenzhen China
Xiangfeng Duan
Department of Chemistry and Biochemistry University of California Los Angeles California USA
Abstract Lithium–sulfur (Li–S) battery is attracting increasing interest for its potential in low‐cost high‐density energy storage. However, it has been a persistent challenge to simultaneously realize high energy density and long cycle life. Herein, we report a synergistic strategy to exploit a unique nitrogen‐doped three‐dimensional graphene aerogel as both the lithium anode host to ensure homogeneous lithium plating/stripping and mitigate lithium dendrite formation and the sulfur cathode host to facilitate efficient sulfur redox chemistry and combat undesirable polysulfide shuttling effect, realizing Li–S battery simultaneously with ultrahigh energy density and long cycle life. The as‐demonstrated polysulfide‐based device delivers a high areal capacity of 7.5 mAh/cm2 (corresponds to 787 Wh/L) and an ultralow capacity fading of 0.025% per cycle over 1000 cycles at a high current density of 8.6 mA/cm2. Our findings suggest a novel strategy to scale up the superior electrochemical property of every microscopic unit to a macroscopic‐level performance that enables simultaneously high areal energy density and long cycling stability that are critical for practical Li–S batteries.
