Porous-Carbon-Coated Sulfur Particles and Their Preparation and Use
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United States of America
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Jan 30, 2018
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Jan 30, 2018
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A sulfur-containing composition is formed from a sulfur particle and a continuous porous carbon coating surrounding the sulfur particle. The porous carbon coating has a uniform or nearly uniform thickness of 1 nm to 10 μm and an average pore size 1 nm or less. In a method of forming a sulfur-containing composition a sulfur particle is contacted with at least one of 1) a polymerizable monomer material under polymerization reaction conditions sufficient to form a continuous carbonizable polymer coating on the sulfur particle surface, and 2) a dissolved carbonizable polymer that forms a carbonizable polymer coating on the sulfur particle surface. The carbonizable polymer coating is carbonized to form a porous carbon coating surrounding the sulfur particle, the porous carbon coating having a uniform or nearly uniform thickness of 1 nm to 10 μm and an average pore size 1 nm or less.
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