Lithium-sulfur battery and cathode therefore

Details Lithium-sulfur battery and cathode therefore Lithium-sulfur battery and cathode therefore

H - Electricity

01

M

H01M 2/16 (2006.01) H01M 10/05 (2010.01) H01M 4/48 (2010.01) H01M 4/50 (2010.01) H01M 4/62 (2006.01)

Patent

CA 2717767

An improved cathode (104) suitable for lithium-sulfur batteries, a battery (100) including the cathode (104), and a battery including a separator (106) containing inorganic fillers are disclosed. The cathode (104) includes sulfur and a metal oxide and optionally includes an additional polymeric material. The metal oxide reduces dissolution of sulfur at the cathode (104) and reduces sulfur-containing deposits on the battery anode (102), thereby providing a battery (100) with relatively high energy density and good partial discharge performance. The separator (106) also reduces unwanted diffusion of sulfur species.

Cette invention concerne une cathode améliorée adaptée aux accumulateurs lithium-soufre, un accumulateur comprenant cette cathode, et un accumulateur incluant un séparateur qui contient des charges inorganiques. Ladite cathode se compose de soufre et dun oxyde métallique, et éventuellement dune substance polymère supplémentaire. Loxyde métallique limite la dissolution du soufre à lemplacement de la cathode et réduit les dépôts sulfureux sur lanode de laccumulateur. La densité dénergie obtenue grâce à cet accumulateur est donc relativement élevée, et les performances de laccumulateur en matière de décharge partielle sont bonnes. Ledit séparateur limite également la diffusion non souhaitée des espèces du soufre.

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