Silver nanopowder (CAS number 7440-22-4) exhibit high electrical conductivity (6.3 × 107 at 20 °C). They are commonly used in conductive paste for electronic devices. Silver nanoparticles are also employed as antimicrobial agents, owing to their interactions with phosphate-containing compounds within cells and sulphur-containing proteins on membranes.

Recently, silver nanoparticles have extended their applications to include batteries. A zinc-air battery incorporating silver and graphene oxide as the air cathode demonstrates the maximum current density of 150 mA/cm2 at 0.44 V and peak powder of 68 mW/cm2 at 130 mA/cm2. When a silver powder-modified graphite-composite interlayer used as an anode, it results in a homogeneous formation of Li10Ag3 with minimal Li residue after discharge.

Silver nanopowder can also improve the solar-to-electric efficiency of an N719 dye-sensitized solar cell, enhancing it from 0.98% to 1.2%.

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