3D CNTs/Graphene-S-Al3 Ni2 Cathodes for High-Sulfur-Loading and Long-Life Lithium-Sulfur Batteries

Advanced Science
Zeqing GuoShaoming Huang

Abstract

Lithium-sulfur batteries suffer from poor cycling stability at high areal sulfur loadings (ASLs) mainly because of the infamous shuttle problem and the increasing diffusion distance for ions to diffuse along the vertical direction of the cathode plane. Here, a carbon nanotube (CNT)/graphene (Gra)-S-Al3Ni2 cathode with 3D network structure is designed and prepared. The 3D network configuration and the Al in the Al3Ni2 provide an efficient channel for fast electron and ion transfer in the three dimensions, especially along the vertical direction of the cathode. The introduction of Ni in the Al3Ni2 is able to suppress the shuttle effect via accelerating reaction kinetics of lithium polysulfide species conversion reactions. The CNT/Gra-S-Al3Ni2 cathode exhibits ultrahigh cycle-ability at 1 C over 800 cycles, with a capacity degradation rate of 0.055% per cycle. Additionally, having high ASLs of 3.3 mg cm-2, the electrode delivers a high reversible areal capacity of 2.05 mA h cm-2 (622 mA h g-1) over 200 cycles at a higher current density of 2.76 mA cm-2 with high capacity retention of 85.9%. The outstanding discharge performance indicates that the design offers a promising avenue to develop long-life cycle and high-sulfur-loading L...Continue Reading

References

Nov 19, 2014·Advanced Materials·Meng-Qiang ZhaoYury Gogotsi
Sep 4, 2015·Journal of the American Chemical Society·Hesham Al SalemLeela Mohana Reddy Arava
May 28, 2016·Advanced Materials·Zhiming CuiJohn B Goodenough
Sep 16, 2016·Advanced Materials·Hong-Jie PengQiang Zhang
Apr 6, 2017·Advanced Materials·Ruopian FangFeng Li
May 19, 2017·Angewandte Chemie·Ting-Zheng HouQiang Zhang

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Citations

May 14, 2019·Advanced Materials·Sheng-Heng Chung, Arumugam Manthiram
Mar 16, 2019·Beilstein Journal of Nanotechnology·Yongguang ZhangYichao Wang
Jul 31, 2019·ACS Applied Materials & Interfaces·Yuchong LaiZhi Yang

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Methods Mentioned

BETA
scanning electron microscopy
transmission electron microscopy
X‐ray

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