Engineering

Novel method brings us a step closer towards cheap hydrogen

Umeå University researchers have made a breakthrough that may make hydrogen—a clean, CO2-free fuel—more affordable. The team has developed a new method that improves how hydrogen gas is produced from water and electricity, ...

Energy & Green Tech

A strategy to rejuvenate dead lithium inside batteries

Li-ion batteries and other emerging lithium-based battery technologies are currently used to power a wide range of devices, including smartphones, laptops, tablets and cameras. Despite their advantages, batteries containing ...

Engineering

Composite metal foam on its way to influencing market

When mechanical and aerospace engineering professor Afsaneh Rabiei began developing composite metal foam, she looked to transform the transportation and military industries. Twenty years later, her product has the potential ...

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Metal

In chemistry, a metal (Greek: Metallo, Μέταλλο) is an element, compound, or alloy characterized by high electrical conductivity. In a metal, atoms readily lose electrons to form positive ions (cations); those ions are surrounded by delocalized electrons, which are responsible for the conductivity. The thus produced solid is held by electrostatic interactions between the ions and the electron cloud, which are called metallic bonds.

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