International Business Machines Corporation

Daimler Ag

Central Glass Company, Limited

Sk on Co., Ltd.

Maxwell Giammona

Young-Hye Na

Jangwoo Kim

Tobias Glossmann

Anthony Fong

Eunseok Lee

Katsutoshi Suzuki

Kazunari Takeda

Masafumi Oda

Tsubasa Itakura

Sho Yamazawa

A rechargeable metal halide battery shows increased metal halide utilization with the introduction of electronegative heteroatom-enriched conductive additives into a metal halide cathode incorporated into an electrically conductive material. The electronegative heteroatom-enriched conductive additives include nitrogen-doped carbon, such as nitrogen-doped single layer graphene, and oxygen-enriched carbon, such as acid-treated carbon black. The modified batteries utilize 20-30% more metal halide than unmodified batteries resulting in enhanced specific capacity and energy density.

Metal halide cathode with enriched conductive additive

An energy storage device includes a coated anode. The coated anode includes a metallic anode in contact with an electrically non-conductive star polymer coating. The star polymers in the star polymer coating include a core with at least 3 arms attached to the core. At least some of the arms of the star polymers have ionically conductive polar functional groups. The energy storage device further includes a cathode and an electrolyte in contact with both the cathode and the coated anode.

Coated electrode for energy storage device

A rechargeable metal halide battery with an optimized active cathode electrolyte solution has high energy density and does not require charging following fabrication. The optimized active cathode electrolyte solution includes (i) a mixture of a metal halide and its corresponding halogen dissolved in an organic solvent at a concentration ratio greater than 0.5 and (ii) an oxidizing gas. The organic solvent is a nitrile-based compound and/or a heterocyclic compound. Glyme may be added to the organic solvent to improve battery performance.

Liquid cathode formulation for rechargeable metal halide battery

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Pleasanton, CA, United States of America

Maxwell Giammona