Analysis of battery cell structure is performed providing a subsurface ultrasonic phased array imaging system. The phase array uses multiple transmitter-receiver pairs to provide phased array tomography of the battery. The phased array imaging system provi...

Ruthenium-based catalysts useful for hydrogen oxidation reaction catalysts, the ruthenium-based catalyst including ruthenium and boron disposed on a surface of a boron-doped carbon support, wherein the catalyst does not comprise B; or a ruthenium-based cat...