{"id":18419,"date":"2023-06-20T06:08:37","date_gmt":"2023-06-20T13:08:37","guid":{"rendered":"https:\/\/essential.construction\/news\/rechargeable-air-batteries-with-polymer-design-admixtures\/"},"modified":"2023-06-20T06:08:38","modified_gmt":"2023-06-20T13:08:38","slug":"rechargeable-air-batteries-with-polymer-design-admixtures","status":"publish","type":"post","link":"https:\/\/essential.construction\/news\/rechargeable-air-batteries-with-polymer-design-admixtures\/","title":{"rendered":"Rechargeable Air Batteries With Polymer Design Admixtures"},"content":{"rendered":"

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United States Of America- <\/strong>As a standard, metals serve as negative electrodes in batteries but recently, redox-active organic molecules have replaced metal materials. The redox-active organic molecules, including quinone and amine-based molecules, have been utilized as negative electrodes in rechargeable metals, specifically in air batteries with oxygen-reducing positive electrodes.<\/p>\n

In an air battery, protons and hydroxide ions participate in the redox reactions. These batteries therefore perform incredibly highly, nearing the maximum capacity that is theoretically possible.<\/p>\n

Using metals in air batteries result in the formation of dendrites, which weaken the battery\u2019s capability and performance, constituting a negative environmental impact. However, the rechargeable air batteries still use liquid electrolytes, like metal-based batteries, meaning the risk for high electrical resistance, leaching effects, and flammability remains high.<\/p>\n

In a study published in Angewandte Chemie International Edition,<\/em> Japanese researchers and scientists have created an all-solid-state rechargeable air battery.<\/a> The capacity and durability of the air battery was investigated.<\/p>\n

The study was led by Professor Kenj Miyatake<\/a> from Waseda University and the University of Yamanashi and was co-authored by Professor Kenichi Oyaizu<\/a> from Waseda University.<\/p>\n

The group of researchers selected chemical 2,5-dihydroxy-1, 4-benzoquinone (DHBQ) and its polymer poly(2,5-dydroxy-1, 4-benzoquinone-3, 6-methylene) (PDBM) as the active materials for the negative electrodes. The chemical and polymer have stable and reversible redox reactions in acidic conditions. Additionally, the researchers used Nafion, a proton-conductive polymer, as the solid electrolyte in substitution of conventional liquid electrolytes.<\/p>\n

\u201cTo the best of my knowledge, no air batteries based on organic electrodes and solid polymer electrolyte have been developed yet,\u201d<\/strong> said Miyatake.<\/p>\n

Researchers experimented with the rechargeable air battery\u2019s charge, discharge performance, rate characteristics, and cyclability. Unlike air batteries that use a metallic negative electrode and an organic liquid electrolyte, the SSAB did not deteriorate in the presence of water and oxygen.<\/p>\n

Replacing the redox-active molecule DHBQ with PDBM established a better negative electrode. The per gram-discharge capacity of the SSAB-DHBQ was 29.7 mAh, while the value of the SSAB-PDB< was 176.1 mAh with a constant current density of 1 mAcm \u207b\u00b2.<\/p>\n

The coulombic efficiency of SSAB-PDBM was 84% at 4 C rate which eventually decreased to 66% at 101 \u00b0C. Although the discharge capacity of SSAB-PDBM was reduced to 44% after 30 cycles, researchers increased it to 78% by increasing the proton-conductive polymer content of the negative electrode. Electron microscopic images confirmed that the addition of Nafion bettered the performance and durability of the PDBM-based electrode.<\/p>\n

The study has succeed in the construction and operation of a SSAB comprising redox-active organic molecules as a negative electrode, a proton-conductive polymer as the solid electrolyte, and an oxygen-reducing, diffusion type positive electrode. \u201cThis technology can extend the battery life of small electronic gadgets such as smartphones and eventually contribute to realizing a carbon-free society\u201d says Miyatake.<\/p>\n

Researchers are hoping that further advancements can be made. Known research and development has been underway similarly from BYLT and Microsoft.<\/p>\n

A full article can be found here<\/a><\/p>\n<\/p><\/div>\n