The effects of current density and amount of discharge on dendrite formation in the lithium powder anode electrode

Seong, Il Won; Hong, Chang Hyun; Kim, Bok Ki; Yoon, Woo Young

doi:10.1016/j.jpowsour.2007.12.062

Cited by 136 publications

(112 citation statements)

References 12 publications

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“…Other methods include the use of powder electrodes [17] and adhesive polymers [18] and describing concentration variations [19,20]. Existing useful dendrite characterizations naturally involve simplifying assumptions such as one dimensional cell geometry that may have fallen short of capturing the comprehensive essentials of dendrite growth in realistic systems [8,21].…”

Section: Introductionmentioning

confidence: 99%

Lithium Dendrite Growth Control Using Local Temperature Variation

2014

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We have quantified lithium dendrite growth in an optically accessible symmetric Limetal cell, charged under imposed temperatures on the electrode surface. We have found that the dendrite length measure is reduced up to 43% upon increasing anodic temperature of about 50 0 C. We have deduced that imposing higher temperature on the electrode surface will augment the reduction rate relative to dendritic peaks and therefore lithium holes can draw near with the sharp deposited tips. We have addressed this mechanism via fundamentals of electrochemical transport.

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Section: Introductionmentioning

confidence: 99%

Lithium Dendrite Growth Control Using Local Temperature Variation

2014

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“…9,[16][17] Numerous empirical and semi-empirical strategies were employed for mitigating the formation of Li 0 dendrites, mostly based on variations of electrode materials and morphologies, and operational conditions. 2 Thus, there are reports on the effect of current density, [18][19][20] electrode surface morphology, 10 solvent and electrolyte composition, [21][22][23][24] electrolyte concentration, 18 evolution time, 25 the use of powder electrodes, 26 and adhesive lamellar block copolymer barriers 27 on dendrite growth. Conceivably, further progress in this field could accrue from the deeper insights on the mechanism of dendrite propagation gained by increasingly realistic, and…”

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confidence: 99%

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

Aryanfar

Brooks

Merinov

et al. 2014

J. Phys. Chem. Lett.

192

155

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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 τc ∼ 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.

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“…Therefore, its commercialization has been limited. To suppress the dendrite formation and improve the cycle life and the safety properties, much research efforts have been conducted, e.g., surface pretreatment on lithium metal to form better solid electrolyte interface [5,6], improvement on the interfacial compatibility by applying new electrolyte systems [7,8], supplement of additives in electrolyte to improve the surface properties [4] and optimization of the lithium electrode fabrication process [9].…”

Section: Introductionmentioning

confidence: 99%