Pulse Reverse Protocol for efficient suppression of dendritic micro-structures in rechargeable batteries

Abstract

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Structural, dynamic, and diffusion properties of a Li6(PS4)SCl superionic conductor from molecular dynamics simulations; prediction of a dramatically improved conductor

“…11 Another major concern for rechargeable LIBs with liquid electrolytes is material degradation in the form of lithium dendrite formation. [12][13][14][15] During fast charging at high current densities, LIBs can experience thermal runaway resulting in catastrophic failure. 16 In recent years, intensive investigations for an alternative to a liquid electrolyte have focused on all-solid-state batteries.…”

“…11 Another major concern for rechargeable LIBs with liquid electrolytes is material degradation in the form of lithium dendrite formation. 12–15 During fast charging at high current densities, LIBs can experience thermal runaway resulting in catastrophic failure. 16…”

The Role of Pulse Duty Cycle and Frequency on Dendritic Compression

“…Similar high-to-low voltage train has been proven as efficient dendrite resilient charging protocol in the recent simulations . Furthermore, the higher efficacy of pulse-reverse charging has been related to the melting of the dendritic tips and flattening the growing interface during the partial-reverse charge period . It is even more interesting to recall that the duration and ratio of the intermittent pause t OFF (i.e., when the interelectrode potential turns zero) and pulse t ON (i.e., duration of applied pulse for electrodeposition) periods plays a very important role in the ramification amount of the growing electrodeposits.…”

“…50 Furthermore, the higher efficacy of pulse-reverse charging has been related to the melting of the dendritic tips and flattening the growing interface during the partial-reverse charge period. 51 It is even more interesting to recall that the duration and ratio of the intermittent pause t OFF (i.e., when the interelectrode potential turns zero) and pulse t ON (i.e., duration of applied pulse for electrodeposition) periods plays a very important role in the ramification amount of the growing electrodeposits. It has been shown that the decreasing t ON can compress the dendrites up to ∼2.5 times, compared to uniform charging.…”