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Meeting Materials Science & Technology 2020
Symposium Late News Poster Session
Presentation Title Silicon Carbon Nitride (SiCN) and Silicon Oxycarbide (SiOC) Functionalization of Molybdenum Disulfide (MoS2) as Stable Battery Electrodes
Author(s) Davi Marcelo Soares, Gurpreet Singh
On-Site Speaker (Planned) Davi Marcelo Soares
Abstract Scope A facile process is demonstrated for the synthesis of layered polymer-derived ceramic (PDC)-MoS2 via pyrolysis of polysilazane and polysiloxane functionalized MoS2 flakes. The layered morphology and polymer to ceramic conversion on MoS2 surfaces is confirmed by transmission electron microscopy (TEM) and spectroscopic techniques. Tested as anode material for lithium- and sodium-ion batteries half-cell, MoS2-SiCN showed the classical three-stage reaction with improved cycling stability and capacity retention than pristine MoS2. Contribution of conversion reaction of alkali-metal ion/TMD system on overall capacity was marginally affected by the presence of SiCN or SiOC while reaction-irreversibility arising from electrolyte decomposition was greatly suppressed. This is understood as one of the reasons for decreased first cycle loss and increased capacity retention. In sum, our results suggest that molecular level interfacing with precursor–derived ceramic is an effective strategy for suppressing the polysulfide and metal-sulfide/electrolyte degradation reaction at low discharge potentials.​

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

A Novel Prototype of Bioactive Ceramic Scaffold for Bone Regeneration
Effect of SiC and CNT on thermal stability of HfB2–ZrB2 Based Ultra High Temperature Composites
Microstructural Evolution and Mechanical Properties of a Cu-2.7at.%Zr Alloy Processed by High-Pressure Torsion
Silicon Carbon Nitride (SiCN) and Silicon Oxycarbide (SiOC) Functionalization of Molybdenum Disulfide (MoS2) as Stable Battery Electrodes
Single and Multi-dopant Diffusion in YAG Ceramics for Lasers

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