Patent ID: 8932764
Filing Date: 2015-01-13
Classification: H01M,Y02E

Abstract:
1. A battery electrode composition comprising core-shell composites, each of the composites comprising: a sulfur-based core 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, wherein the sulfur-based core comprises (a) in a first state, pores mixed in with a sulfur material and (b) in a second state, a dense metal-sulfide formed from the metal corresponding to the metal ions stored and/or released during battery operation, wherein the sulfur-based core in the second state is substantially free of pores; and a multi-functional shell at least partially encasing the sulfur-based core, the shell being 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.