Non-renewable energy sources like fossil fuels have intensified the environmental crises due to the continued emission of greenhouse gases, which could irreversibly damage our ecosystem. Lithium-ion batteries (LIBs) have proven to be successful in the booming electronics industry. However, the capacity of graphite anode is theoretically limited to 370 mA h g-1, resulting in low energy and power density. To address this problem, there is an urgent need to explore alternative battery chemistries. Lithium-Sulfur batteries have generated much excitement in the scientific communities. Sulfur is a low cost, eco-friendly, and is considered one of the most abundant elements in the earth’s crust. Physical and chemical confinement of polysulfides is ought to be the holy grail formula to achieve highly stable Li-S batteries. The specific aim of this work is to deliberately be tailoring specific metal phosphide (CoP) inside nitrogen/oxygen doped porous MOFs matrix (i.e., ZIF-67), one can chemically and physically suppress polysulfide migration.The weight loading of sulfur in GC-CoP@S composite is measured by thermogravimetric analysis (TGA), showing 74 wt%, which indicates a large energy density for the sulfur cathode in Li-S batteries. Cyclic voltammetry shows excellent stability as evident by two cathodic peaks at around 2.0 V and 2.3 V, which associate with the reduction S8 to soluble Li2Sn (2 &lt; n &lt; 8), and then to insoluble Li2S, while the anodic are showing a broad peak at around 2.45 V

Ultrafine cobalt phosphide nanoparticles in nitrogen-doped carbon matrix as sulfur host for advanced lithium-sulfur batteries

Macromolecular Chemistry: The Second Century

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ACS Spring 2020 National Meeting & Expo

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.