Core-shell composites for sulfur-based cathodes in metal-ion batteries
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United States of America Patent
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Jan 13, 2015
Grant Date -
Aug 29, 2013
app pub date -
Feb 25, 2013
filing date -
Feb 28, 2012
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Abstract
A battery electrode composition is provided comprising core-shell composites. Each of the composites may comprise a sulfur-based core and a multi-functional shell. The sulfur-based core is provided to electrochemically react with metal ions during battery operation to store the metal ions in the form of a corresponding metal-sulfide during discharging or charging of the battery and to release the metal ions from the corresponding metal-sulfide during charging or discharging of the battery. The multi-functional shell at least partially encases the sulfur-based core and is formed from a material that is (i) substantially permeable to the metal ions of the corresponding metal-sulfide and (ii) substantially impermeable to electrolyte solvent molecules and metal polysulfides.
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