N-doped carbon/ultrathin 2D metallic cobalt selenide core/sheath flexible framework bridged by chemical bonds for high-performance potassium storage

Conversion Reaction Mechanism of Ultrafine Bimetallic Co‐Fe Selenides Embedded in Hollow Mesoporous Carbon Nanospheres and Their Excellent K‐Ion Storage Performance

“…In comparison with other reported anodes for KIBs, in particular, the CFSe/C delivers higher capacity as well as excellent stability at high current densities (Table S1, Supporting Information). [39][40][41]51,[53][54][55][56] The charge storage kinetics of CFSe/C-250, -300, and -500 composites are further examined by CV tests at various scan rates from 0.1 to 2.0 mV s -1 (Figures 8 and 9). As the scan rate increases, the cathodic/anodic peaks of the composites gradually deviate from the original potential owing to the ohmic resistance (Figure 8a-c).…”

Synergistic effect of cocatalytic NiSe2 on stable 1T-MoS2 for hydrogen evolution

“…Constructing heterogeneous interfaces by introducing another component is an efficient way to boost the electrochemical activity of catalysts. [19][20][21][22][23] As is known to all, HER proceeds with the initial formation of hydrogen intermediates (H*) followed by a Tafel or Heyrovsky step. The synergistic effect between two hybridized components could ne tune their surface adsorption properties by interfacial electronic coupling and facilitate an excellent activity and a high stability towards HER.…”

MOF-Derived CoSe2@N-Doped Carbon Matrix Confined in Hollow Mesoporous Carbon Nanospheres as High-Performance Anodes for Potassium-Ion Batteries

“…However, two major obstacles still require to be overcome: their large volume expansion upon potassiation and their low electrical conductivity. Thus, to enhance the potassium storage performance of transition metal selenides, many studies have proposed various strategies such as designing unique nanostructured materials and combining them with conductive carbonaceous materials [8][9][10][11].…”