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US 10,312,500 B2Granted
Formation of slurry for high loading sulfur cathodes
AssigneeToyota Motor Engineering & Manufacturing North America, Inc.
InventorsNaoki Osada, Claudiu B. Bucur, John Muldoon
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Abstract
A high density slurry comprising encapsulated sulfur particles, carbon nanofibers and activated carbon black suitable for use in forming the active material of an electrode. A method for forming the high density sulfur slurry is also provided. A cathode containing the particles and a battery constructed with the cathode as well as methods for their formation are also provided.
Claims25
A slurry, comprising:
- encapsulated chalcogen particles, comprising a chalcogen core and an encapsulate coating disposed on the chalcogen core surface consisting of at least one polymer having both hydrophobic regions and hydrophilic regions;
- carbon nanofibers;
- carbon black;
- carboxymethyl cellulose;
- styrene butadiene rubber;
- and
- water;
- wherein
- a sulfur content of the encapsulated chalcogen particles is greater than 90 wt % relative to the total dry weight of the encapsulated chalcogen particles,
- a content of sulfur is greater than 85 wt % relative to a total dry weight of the slurry;
- and
- a ratio of carbon nanofibers to carbon black is 3:1.
9 more elements
Dependencies are inferred from the claim text.