Lithium Electrode Morphology during Cycling in Lithium Cells

Yoshimatsu, Isamu; Hirai, Toshiro; Yamaki, Jun‐ichi

doi:10.1149/1.2095351

Cited by 240 publications

(228 citation statements)

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“…6 in fact reflect how the morphology and connectivity of deposits change along charging periods. 4,34 Fig. 2a, which is a plot of the voltage V(t) required to maintain constant current i 0 during charge and discharge periods, View Article Online provides revealing insights into the evolution of electrodeposits.…”

Section: Discussionmentioning

confidence: 99%

“…DLCs represent an irreversible loss of battery capacity. 4,5 This drawback not only compromises the reliability but ultimately decreases the capacity of Li 0 batteries. 2,[6][7][8][9][10] Work on dendrite growth has mainly focused on the effects of charging protocol, 11,12 current density, 13,14 electrode surface morphology, 15,16 temperature, 17,18 solvent and electrolyte chemical composition, [19][20][21] electrolyte concentration 22,23 and evolution time 24,25 on dendrite growth.…”

Section: Introductionmentioning

confidence: 99%

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Quantifying the dependence of dead lithium losses on the cycling period in lithium metal batteries

Aryanfar

Brooks

Colussi

et al. 2014

Phys. Chem. Chem. Phys.

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We quantify the effects of the duration of the charge-discharge cycling period on the irreversible loss of anode material in rechargeable lithium metal batteries. We have developed a unique quantification method for the amount of dead lithium crystals (DLCs) produced by sequences of galvanostatic charge-discharge periods of variable duration t in a coin battery of novel design. We found that the cumulative amount of dead lithium lost after 144 Coulombs circulated through the battery decreases sevenfold as t shortens from 16 to 2 hours. We ascribe this outcome to the faster electrodissolution of the thinner dendrite necks formed in the later stages of long charging periods. This phenomenon is associated with the increased inaccessibility of the inner voids of the peripheral, late generation dendritic structures to incoming Li + .

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Quantifying the dependence of dead lithium losses on the cycling period in lithium metal batteries

Aryanfar

Brooks

Colussi

et al. 2014

Phys. Chem. Chem. Phys.

View full text Add to dashboard Cite

show abstract

“…The reaction of the dendrites with the electrolyte as well as with various impurities results in corrosion and the subsequent isolation of lithium (so-called dead Li), which in turn produces a gradual loss of cycling capacity. 5,6 In addition, the loss of Li to the solid-electrolyte interphase (SEI) is thought to be the most common and fundamental source of capacity loss in Li metal batteries. The SEI layer is initially advantageous since it protects the Li metal from decomposition by the solvent.…”

Section: ¹1mentioning

confidence: 99%

“…Some researchers have tried to examine the efficiency of lithium usage in a Li metal battery. 5,6 Because Li-O 2 battery usually showed extremely excess amount of Li based capacity; the amount of Li metal for the capacity will be much larger than other battery systems and the utilization of Li is generally less than 20% in the conventional study. Therefore, influence of Li utilization on discharge capacity and cycle stability of Li-O 2 battery is required to be studied.…”

Section: ¹1mentioning

confidence: 99%

“…Although lithium has the advantage of possessing a very high theoretical specific capacity, there are some problems associated with dendrite (that is, needle-like shape lithium) growth on Li metal surfaces during charge and discharge cycles. 5,6,16,17 These dendrites are electrochemically the same as Li metal but if the connection to the anode is cut during discharge, it is reasonable to expect that the capacity will decrease over subsequent cycles due to the lack of electrical connection. Since the dendrites are partially inactive during the following discharge cycle, this reduces the efficiency of the cell during Li dissolution/deposition cycles.…”

Section: Electrochemistry 82(4) 267-272 (2014)mentioning

confidence: 99%

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Li Utilization and Cyclability of Li-O2 Rechargeable Batteries Incorporating a Mesoporous Pd/^|^beta;-MnO2 Air Electrode

2014

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The effects of Li utilization on the capacity and cycle stability of Li-O 2 batteries were studied by investigating the performance of cells incorporating varying ratio of Li metal to air electrode catalyst. The quantity of Li metal was found to affect the overall discharge capacity, such that the capacity decreased with decreasing amounts of Li in the anode. Although a capacity of only 354 mAh g −1 (cathode) was obtained when the anode contained 0.9 mg Li, almost 100% of the Li in the cell was consumed during discharge, which corresponds to a capacity of 3932 mAh g −1 (Li). The cycle stability of cells operating under high Li utilization conditions was, however, significantly reduced. Detailed analysis of the Li distribution in the cell suggests that decreased usage of Li within the first few cycles is the cause of the poor cycle stability. The results of this study suggest that low cycle stability in a Li-O 2 battery may be attributed to the formation of a surface passivation layer on the Li metal composed primarily of Li 2 CO 3 and ROCO 2 Li and generated by reaction with the electrolyte.

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Lithium Metal Anode

Liu

Yang

Lü

2019

Encyclopedia of Inorganic and Bioinorganic Chemistry

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Lithium metal batteries (LMBs) are among the most sought‐after battery chemistries for high‐energy storage devices. However, LMBs always undergo uncontrollable lithium deposition, relatively lower Coulombic efficiency (CE), severe side reactions, and limited power output, which impede their practical applications. In the last 40 years, numerous efforts have been made to solve these issues, ranging from theoretically modeling the lithium dendrite growth behavior to experimentally modifying the lithium metal anode. This article provides an overview of LMBs and its main challenge—dendritic lithium growth. First, the advantages and disadvantages of LMBs are discussed compared with the state‐of‐the‐art lithium‐ion batteries, in which the lithium dendrite growth and fast CE decay are extensively considered. Specific characterization techniques are also summarized to understand the growing behavior of dendritic lithium and anode surface chemistry. To understand the fading mechanisms of LMBs, numerous models and hypotheses are carried out to predict the solid electrolyte interphase (SEI) formation, ionic electromigration, and finally dendritic growth behavior. From the insights of the abovementioned theoretical basis, methods concerning on suppressing lithium dendrites and improving the cell CE are categorized as the electrolyte additives, structural electrolyte development, new battery operation mode, multidimensional composite electrode design, and so on. Finally, future directions are given that are expected to drive progress in the development of LMBs.

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Lithium Electrode Morphology during Cycling in Lithium Cells

Cited by 240 publications

References 1 publication

Quantifying the dependence of dead lithium losses on the cycling period in lithium metal batteries

Quantifying the dependence of dead lithium losses on the cycling period in lithium metal batteries

Li Utilization and Cyclability of Li-O2 Rechargeable Batteries Incorporating a Mesoporous Pd/^|^beta;-MnO2 Air Electrode

Lithium Metal Anode

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