Hierarchical Spatial Confinement Unlocking the Storage Limit of MoS 2 for Flexible High-Energy Supercapacitors

Molybdenum sulfide (MoS2) is a promising electrode material for supercapacitors; however, its limited Mo/S edge sites and intrinsic inert basal plane give rise to sluggish active electronic states, thus constraining its electrochemical performance. Here we propose a hierarchical confinement strategy to develop ethylene molecule (EG)-intercalated Co-doped sulfur-deficient MoS2 (Co-EG/SV-MoS2) for efficient and durable K-ion storage. Theoretical analyses suggest that the intercalation-confined EG and lattice-confined Co can enhance the interfacial K-ion storage capacity while reducing the K-ion diffusion barrier. Experimentally, the intercalated EG molecules with mildly reducing properties induced the creation…

• AN
  Australian National Fabrication Facility
• NN
  National Natural Science Foundation of China

  Awards: 52302251, 52302223
• SA
  Science and Technology Commission of Shanghai Municipality

  Award: 19511120100
• NR
  National Research Foundation of Korea

  Award: NRF-2019R1A2C2090443
• ER
  Exploratory Research for Advanced Technology

  Award: JPMJER2003