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Energy Density Comparison of Silver-Zinc Button Cells with Rechargeable Li-Ion and Li-Polymer Coin and Miniature Prismatic Cells

Jeff Ortega, Ph.D., Director of Research, ZPower, LLC
Ross Dueber, Ph.D., President and CEO, ZPower, LLC

Silver-zinc batteries have the highest theoretical specific energy (Wh/kg) and energy density (Wh/L) of all rechargeable battery technologies available commercially today. Rechargeable silver-zinc batteries have been successfully used for decades in military and aerospace applications where high energy and power density are required.  The electrochemical reaction involves the oxidation of zinc to zinc oxide and the accompanying reduction of silver(II) oxide to metallic silver. The reaction at the AgO cathode involves a two-step oxidation (1.8 V and 1.5 V) of two water molecules to form hydroxide anions that migrate to the anode where they oxidize the metallic Zn to form the soluble zincate species before precipitation of the zinc oxide. MORE

How to Use an SMU Instrument in Charge/Discharge Cycling for Battery Characterization

Mary Anne Tupta
Keithley Instruments, a Tektronix Company

Rechargeable batteries power a rapidly expanding range of electronic devices, from laptops and tablets to mobile phones and wearable health-monitoring devices. When purchasing these devices, consumers typically take a hard look at battery life and recharge times; operating time is often a deciding factor in the purchase of a mobile device. As a result, researchers are studying ways to increase battery life and decrease the cost of rechargeable batteries. MORE

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