Abstract
The energy storage become one of most important a strategic area in context of sustainable development of human society. With last two decades, the electrochemical energy storage devices (batteries), got crucial role. The current trend led by electromobility, renewable energy resources set new level of requirements on battery parameters. Since 1991 when the first commercial lithium-ion battery was produced, this battery technology developed to the most advanced battery technology on the market. Lithium-ion batteries found application in wide range of devices from small portable electronic devices, via electric vehicles up to huge stationary energy storage systems. Important parameter of the battery it is the rate capability parameter. The current generation which occurs in the battery during charging-discharging cycle is directly proportional to rate of reactions. And the reaction rate depends on diffusion rate. In this work the diffusion rate expressed by chemical diffusion coefficient is measured and evaluated.
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