NiMH No. 7 battery

　　Research finds that hydrogen NiMH No. 7 battery energy density can be improved by adding MOF materials

　　Research has found that the energy density of hydrogen NiMH No. 7 batterys can be increased by adding MOF materials - according to foreign media reports, researchers are working on developing the next generation of electric vehicles and have encountered a bottleneck in the development of lithium-ion batteries. But a team of researchers at the University of Michigan has pushed hydrogen NiMH No. 7 batterys, a competitive electric vehicle technology, to new heights.

　　According to foreign media reports, researchers are working on developing the next generation of electric vehicles and have encountered a bottleneck in developing lithium-ion batteries. But a team of researchers at the University of Michigan has pushed the performance of hydrogen NiMH No. 7 batterys, a competitive electric vehicle technology, to new heights.

　　A hydrogen NiMH No. 7 battery is a zero-emission energy source, like a hybrid of a battery and a fuel tank, that uses hydrogen as fuel and uses the chemical reaction between hydrogen and oxygen to generate electricity. The only emission is "water."

　　One of the limitations of the technology is the inability to store sufficient amounts of hydrogen. University of Michigan researchers have found a way to cram more hydrogen into small storage structures called metal-organic frameworks, increasing battery energy density and ultimately boosting expectations for fuel-cell vehicles recharge mileage.

　　Metal-organic framework (MOF) is a designed material composed of metal ions coupled with organic molecules. It has porous properties and is one of the most promising ways to store hydrogen.

　　The University of Michigan researchers collected information on all MOFs, including previously built and envisioned MOFs, and then compiled the information into a database. High-throughput computer simulations were then used to search the resulting database, which contains nearly 500,000 MOFs, for data with good performance. Three MOFs have been identified that exceed previous hydrogen storage records, and researchers have synthesized such materials for use in batteries and demonstrated their performance.

　　The three MOFs are named SNU-70, UMCM-9 and pCN-610/NU-100. Each of them exceeds the performance of another MOF certified by the research team in 2017, IRMOF-20.

　　Electric vehicle designers have been looking to improve efficiency by reducing the size of vehicle powertrains, and University of Michigan researchers say the need to store large amounts of hydrogen in small batteries could be alleviated by increasing the amount of hydrogen stored in MOF material adsorbents. pressure.

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