A Method for Fast Estimation of the Rate-Limiting Step in Lithium-Ion Batteries

作者：Gaberscek Miran^*

来源：Acta Chimica Slovenica, 2014, 61(3): 480-487.

• Lithium ion batteries
• charge transport
• electrode thickness
• rate performance
• electronic wiring

Transport of charge in electrodes for lithium-ion batteries is complex. For accurate description one needs to use a multilevel approach which addresses processes on different scales - from the ones occurring inside active nanoparticles to those governing the transport in composite electrodes or in separators of sub-millimeter thickness. Here we attempt an approximation that allows for a fast estimation of the rate-limiting step in given electrochemical cell. Despite thoroughly simplified description of transport, the method gives suprisingly good prediction of polarisation resistance as a function of charge/discharge rate and of the electrode thickness. The method might be helpful for fast evaluation of new materials or new electrode designs in everyday laboratory testing.

• 出版日期2014