Surface modification of hollow capsule by Dawson-type polyoxometalate as sulfur hosts for ultralong-life lithium-sulfur batteries

Enhanced catalysis of a vanadium-substituted Keggin-type polyoxomolybdate supported on the M3O4/C (M = Fe or Co) surface enables efficient and recyclable oxidation of HMF to DFF

“…19-0629). 78 The PXRD peaks of Co 3 O 4 /C at 18.91°, 31.20°, 36.85°, 59.35°, and 65.24° are well matched with the crystal plane parameters of Co 3 O 4 at (111), (220), (311), (511), and (440), respectively (JCPDS no. 42-1467).…”

Bidirectional Catalyst with Robust Lithiophilicity and Sulfiphilicity for Advanced Lithium–Sulfur Battery

“…[47] Besides, the MCN modified separator also showed a lower solid-electrolyte interface (SEI) resistance (R SEI ) which may related to a favorable SEI formation. On one hand, the good conductivity of MCN can accelerate the transmission of electrons; [48] On the other hand, the loose cocoon-like structure and electrophilicity characteristics of MCN also provides adequate lithium-ion transport channels and shortens the transportation path of lithium ion, thus accelerating the transportation of lithium ion to a certain extent. Comparing the galvanostatic charge-discharge profiles of the two samples (Figure 4f), MCN shows a significantly low polarization (156 mV) than CN (226 mV).…”

Boosting the high rate and durability of lithium–sulfur batteries using a bidirectional catalyst of a polyoxometalate-cyclodextrin supramolecular compound

“…[24][25][26][27][28] Due to their unique and stable structural characteristics, variable valence states, and adjustable redox potentials, some elaborately designed POMs as catalysts have been successfully utilized in Li − , and so on. [29][30][31][32][33] It is worth mentioning that POMs are prone to dissolution in the electrolytes during cycling, resulting in a decrease of catalyst utilization. In previous reports, POM catalysts were combined with reduced graphene oxide or carbon nanotubes to enhance the cell performance, 34,35 but the strength of this physical interaction was not sufficient to anchor the POMs to avoid their dissolution during lithiation processes.…”