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Dynamics of Lithium Dendrite Growth and Inhibition: Pulse Charging Experiments and Monte Carlo Calculations

Aryanfar, Asghar and Brooks, Daniel J. and Merinov, Boris V. and Goddard, William A., III and Colussi, Agustín J. and Hoffmann, Michael R. (2014) Dynamics of Lithium Dendrite Growth and Inhibition: Pulse Charging Experiments and Monte Carlo Calculations. Journal of Physical Chemistry Letters, 5 (10). pp. 1721-1726. ISSN 1948-7185. doi:10.1021/jz500207a.

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Short-circuiting via dendrites compromises the reliability of Li-metal batteries. Dendrites ensue from instabilities inherent to electrodeposition that should be amenable to dynamic control. Here, we report that by charging a scaled coin-cell prototype with 1 ms pulses followed by 3 ms rest periods the average dendrite length is shortened ~2.5 times relative to those grown under continuous charging. Monte Carlo simulations dealing with Li^+ diffusion and electromigration reveal that experiments involving 20 ms pulses were ineffective because Li^+ migration in the strong electric fields converging to dendrite tips generates extended depleted layers that cannot be replenished by diffusion during rest periods. Because the application of pulses much shorter than the characteristic time τ_c~O(1 ms) for polarizing electric double layers in our system would approach DC charging, we suggest that dendrite propagation can be inhibited (albeit not suppressed) by pulse charging within appropriate frequency ranges.

Item Type:Article
Related URLs:
URLURL TypeDescription Information
Aryanfar, Asghar0000-0002-8890-077X
Merinov, Boris V.0000-0002-2783-4262
Goddard, William A., III0000-0003-0097-5716
Colussi, Agustín J.0000-0002-3400-4101
Hoffmann, Michael R.0000-0001-6495-1946
Additional Information:© 2014 American Chemical Society. Received: January 29, 2014; Accepted: April 30, 2014; Published: April 30, 2014. We thank undergraduate student Alejandro Sánchez for helping with the manufacture of cell parts. This work was sponsored by Bill and Melinda Gates Foundation Grant No. OPP1069500 on environmental sustainability and, in part, by Bosch Energy Research Network Grant No. 13.01.CC11.
Funding AgencyGrant Number
Bill and Melinda Gates FoundationOPP1069500
Bosch Energy Research Network13.01.CC11
Issue or Number:10
Record Number:CaltechAUTHORS:20140512-074246774
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Official Citation:Dynamics of Lithium Dendrite Growth and Inhibition: Pulse Charging Experiments and Monte Carlo Calculations Asghar Aryanfar, Daniel Brooks, Boris V. Merinov, William A. Goddard, III, Agustín J. Colussi, and Michael R. Hoffmann The Journal of Physical Chemistry Letters 2014 5 (10), 1721-1726
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:45658
Deposited By: Ruth Sustaita
Deposited On:12 May 2014 15:07
Last Modified:10 Nov 2021 17:15

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