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Why Lithium Ion Batteries Can’t Hold More Charge, Scientists Find


1024px Nicd disassembled 300×225 Why Lithium Ion Batteries Cant Hold More Charge, Scientists FindThere are a number of factors which affect the power capacity and lifespan of the rechargeable battery packs that are found in hybrid electric vehicle [HEV] or electric vehicle [EV]. Battery chemistry, of course, plays a significant role, and currently, lithium-ion [Li-ion] batteries offer the industry’s best power transfer characteristics.

1024px Nicd disassembled 300×225 Why Lithium Ion Batteries Cant Hold More Charge, Scientists FindThere are a number of factors which affect the power capacity and lifespan of the rechargeable battery packs that are found in hybrid electric vehicle [HEV] or electric vehicle [EV]. Battery chemistry, of course, plays a significant role, and currently, lithium-ion [Li-ion] batteries offer the industry’s best power transfer characteristics.

Charging and discharging must also be precisely controlled to maximize battery life. Anode and cathode material are another important aspect of battery life. Until now, though, battery researchers had never considered that something, besides the charging system, might have an effect on battery life.

During normal battery operation, lithium ions collect on the anode during charging, and on the cathode when discharging. Researchers at Ohio State University [OSU] were investigating the accumulation of lithium on the anode, which shortens battery life, and accidentally discovered lithium accumulation elsewhere.

“We didn’t set out to find lithium in the current collector, so you could say we accidentally discovered it, and how it got there is a bit of a mystery. As far as we know, nobody has ever expected active lithium to migrate inside the current collector,” explained Bharat Bhushan, Ohio Eminent Scholar and Howard D. Winbigler Professor of Mechanical Engineering.
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