3D CNTs/Graphene-S-Al₃Ni₂ Cathodes for High-Sulfur-Loading and Long-Life Lithium-Sulfur Batteries.

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

SUBMITTER: Guo Z 

PROVIDER: S-EPMC6051211 | biostudies-literature | 2018 Jul

REPOSITORIES: biostudies-literature