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Tohoku Univ. Technology：Cathode material for rechargeable magnesium batteries： T22-266

Tohoku Univ. Technology：Cathode material for rechargeable magnesium batteries： T22-266

Activating disordered rocksalt oxides for cathode materials

　Rechargeable magnesium batteries (RMBs) have been developed as post lithium-ion batteries. Previously, only the Chevrel compounds were known to be available as a cathode material for RMBs. However, practical RMBs require cathode materials, which could deliver high capacity with higher electrochemical potential. 　The present invention provides cathode materials with a disordered rocksalt structure for RMBs. The novel chemical composition of the present material successfully enables reversible and substantial Mg intercalation, which has been previously believed to be difficult, especially in the rocksalt structure. The materials of this patent will expectedly yield cathode materials with higher capacity and electrode potential.

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Next-generation battery sulfur-based cathode materials

Next-generation battery sulfur-based cathode materials

Successful significant improvement in cycle characteristics through the composite of sulfur and special polymers!

Sumitomo Rubber Industries, Ltd. handles "sulfur-based cathode materials," which are gaining attention as one of the next-generation batteries. They are free of rare metals and can operate in a range of -20°C to 80°C. By combining sulfur with a special polymer, we have successfully achieved significant improvements in the previously challenging cycle characteristics. For detailed technical information and sample provision, please contact us. 【Features】 ■ Approximately 4 times the commercial LIB materials at over 600mAh/g ■ Free of rare metals ■ 95% cycle characteristics over 100 cycles ■ Operates in a range of -20°C to 80°C ■ Compatible with commercial LIB electrolytes *For more details, please refer to the PDF document or feel free to contact us.

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Tohoku University Technology: Positive electrode material for magnesium storage battery : T19-070

Tohoku University Technology: Positive electrode material for magnesium storage battery : T19-070

Realization of sulfur-based positive electrode material from sulfide!

Magnesium battery has being researched and developed as a promising candidate for post lithium ion battery due to its abundant reserve and high capacity per volume. Up to now, a material with chevrel structure was almost the only known positive electrode material for practical magnesium battery. However, the electromotive force is about 1 V which is low, and a material that can generate high electromotive force has been searched. 　This invention is about a sulfur-based positive electrode material made by electrochemical desorption from sulfide, which can solve above issues. Based on the invention concept, it is able to fabricate a "porous frame + active substance" composite material, and to provide a cathode material with a higher working potential and improved cycle characteristic than conventional material.

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Tohoku University Technology: Positive electrode material for magnesium storage battery: T18-490

Tohoku University Technology: Positive electrode material for magnesium storage battery: T18-490

Realization of over 2x high potential characteristic than conventional one!

Magnesium battery has being researched and developed as a promising candidate for post lithium ion battery due to its abundant reserve and high capacity per volume. Up to now, a material with chevrel structure was almost the only known positive electrode material for practical magnesium battery. However, the electromotive force is about 1 V which is low, and a material that can generate high electromotive force has been searched. 　This invention is about a material based on a spinel structure that solves above issues. By employing a defective spinel type oxide that contains defect in the cation site, this invention has succeeded to suppress the crystal structure change due to insertion and desorption of magnesium. As a result, it offers a positive electrode material with higher working potential and improved cycle characteristic than conventional material.

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Tohoku University Technology: All-Solid-State Lithium Secondary Battery: T11-030

Tohoku University Technology: All-Solid-State Lithium Secondary Battery: T11-030

Succeed to improve cycle life by using metal free low cost organic active material (cathode)!

Lithium-ion battery is used in laptop and digital camera because of its light weight and high capacity. The cathode material is said to be one of the most expensive material used in lithium-ion battery. LiCoO2 is commonly used as cathode material, which is not only expensive but also a rare metal with few reserve, and there is concern about its stable supply. Therefore, the development of new electrode material that is low cost and that can be stably supplied from a resource is actively pursued.　 　This invention is about a new cathode material that is low cost and that can be stably supplied from a resource. The organic active material doesn't contain Ni or Co. Nevertheless the capacity of the new cathode material is over 180 (mAh/g), which is equal to or higher than that of the conventional cathode material. Moreover, this material has the property of being resistant to deterioration due to charging and discharging.

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New aqueous positive electrode materials for nickel-zinc secondary batteries [Public Suwa University of Science and Technology]

New aqueous positive electrode materials for nickel-zinc secondary batteries [Public Suwa University of Science and Technology]

This is a new positive electrode material that promotes the development of nickel-zinc secondary batteries.

We introduce a new positive electrode material that solves the issue of "capacity degradation" that has been a challenge for conventional nickel-zinc batteries. This positive electrode material is based on the intercalation reaction of layered double hydroxides (LDH), which are composed of divalent metal hydroxide ions and trivalent metal ions. The layered structure of LDH also helps to avoid capacity degradation caused by the nickel-zinc reaction, making it suitable as a positive electrode material. It contributes to the development of secondary batteries that excel in performance and safety, serving as an alternative to non-aqueous, acidic secondary batteries. *For more details, please download the PDF or feel free to contact us.*

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