Theoretical investigation of lithium ions’ nucleation performance on metal-doped Cu surfaces

Fan, Yanchen; Wang, Tianshuai; Legut, Dominik; Zhang, Qianfan

doi:10.1016/j.jechem.2019.01.021

Cited by 23 publications

(10 citation statements)

References 62 publications

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“…In order to yield high-quality results, the model is built by using ultrafine grid division and the maximum grid size is 0.015 µm. Dirichlet boundary conditions are used to solve Equations ( 14)- (22). The simulation for the growth process of the Li in a 2D model is conducted with model of 10 µm × 5 µm.…”

Section: Field-phase Simulation Sectionmentioning

confidence: 99%

Insight into the Critical Role of Exchange Current Density on Electrodeposition Behavior of Lithium Metal

et al. 2021

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Due to an ultrahigh theoretical specific capacity of 3860 mAh g−1, lithium (Li) is regarded as the ultimate anode for high‐energy‐density batteries. However, the practical application of Li metal anode is hindered by safety concerns and low Coulombic efficiency both of which are resulted fromunavoidable dendrite growth during electrodeposition. This study focuses on a critical parameter for electrodeposition, the exchange current density, which has attracted only little attention in research on Li metal batteries. A phase‐field model is presented to show the effect of exchange current density on electrodeposition behavior of Li. The results show that a uniform distribution of cathodic current density, hence uniform electrodeposition, on electrode is obtained with lower exchange current density. Furthermore, it is demonstrated that lower exchange current density contributes to form a larger critical radius of nucleation in the initial electrocrystallization that results in a dense deposition of Li, which is a foundation for improved Coulombic efficiency and dendrite‐free morphology. The findings not only pave the way to practical rechargeable Li metal batteries but can also be translated to the design of stable metal anodes, e.g., for sodium (Na), magnesium (Mg), and zinc (Zn) batteries.

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Section: Field-phase Simulation Sectionmentioning

confidence: 99%

Insight into the Critical Role of Exchange Current Density on Electrodeposition Behavior of Lithium Metal

et al. 2021

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“…So modifying Li metal anode is quite necessary to realize its practical application in Li metal batteries. To date, many methods have been put forward by researchers to improve the stability of Li metal anodes. − These methods can be summarized as designing three-dimensional (3D) current collectors or hosts, − varying the constituents of liquid electrolytes, − replacing corrosive liquid electrolytes by robust solid-state electrolyte, − designing artificial SEI, − coating a protective layer, − improving the lithiophilicity of substrates, − decorating separators, − using less-reactive Li-based alloy instead of pure Li metal, − developing detection tools, , combining theoretical and experimental study, , optimizing the working environment, − controlling the crystallinity of Li deposition, and so on . The detailed description and analysis about these strategies can be found in our previous review …”

Section: Metal Anodementioning

confidence: 99%

Covalent Organic Frameworks and Their Derivatives for Better Metal Anodes in Rechargeable Batteries

et al. 2021

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Metal anodes based on a plating/stripping electrochemistry such as metallic Li, Na, K, Zn, Ca, Mg, Fe, and Al are recognized as promising anode materials for constructing next-generation high-energy-density rechargeable metal batteries owing to their low electrochemical potential, high theoretical specific capacity, superior electronic conductivity, etc. However, inherent issues such as high chemical reactivity, severe growth of dendrites, huge volume changes, and unstable interface largely impede their practical application. Covalent organic frameworks (COFs) and their derivatives as emerging multifunctional materials have already well addressed the inherent issues of metal anodes in the past several years due to their abundant metallophilic functional groups, special inner channels, and controllable structures. COFs and their derivatives can solve the issues of metal anodes by interfacial modification, homogenizing ion flux, acting as nucleation seeds, reducing the corrosion of metal anodes, and so on. Nevertheless, related reviews are still absent. Here we present a detailed review of multifunctional COFs and their derivatives in metal anodes for rechargeable metal batteries. Meanwhile, some outlooks and opinions are put forward. We believe the review can catch the eyes of relevant researchers and supply some inspiration for future research.

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“…By contrast, a low nucleation overpotential of 10 mV is observed on MGH electrode at 0.1 mA/cm 2 . The nucleation difference between these two electrodes can be attributed to their surface properties [45][46][47][48]. The ultrahigh specific surface area of MGH (2090 m 2 /g) compared with that of flat Cu foil effectively decreases the local current density of the electrode at the same bulk current density.…”

Section: Nucleation and Deposition Behavior On Mgh Electrodementioning

confidence: 99%

Mesoporous Graphene Hosts for Dendrite-Free Lithium Metal Anode in Working Rechargeable Batteries

Cheng

Zhang

et al. 2020

Trans. Tianjin Univ.

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Lithium (Li) metal anode has received extensive attentions due to its ultrahigh theoretical capacity and the most negative electrode potential. However, dendrite growth severely impedes the practical applications of the Li metal anode in rechargeable batteries. In this contribution, a mesoporous graphene with a high specific surface area was synthesized to host the Li metal anode. The mesoporous graphene host (MGH) has a high specific surface area (2090 m 2 /g), which affords free space and an interconnected conductive pathway for Li plating and stripping, thus alleviating the volume variation and reducing the generation of dead Li during repeated cycles. More importantly, the high specific surface area of MGH efficiently reduces the local current density of the electrode, which favors a uniform Li nucleation and plating behavior, rendering a dendritefree deposition morphology at a low overpotential. These factors synergistically boost the Li utilization (90.1% vs. 70.1% for Cu foil) and life span (150 cycles vs. 100 cycles for Cu foil) with a low polarization of MGH electrode at an ultrahigh current of 15.0 mA/cm 2 . The as-prepared MGH can provide fresh insights into the electrode design of the Li metal anode operating at high rates.

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Theoretical investigation of lithium ions’ nucleation performance on metal-doped Cu surfaces

Cited by 23 publications

References 62 publications

Insight into the Critical Role of Exchange Current Density on Electrodeposition Behavior of Lithium Metal

Insight into the Critical Role of Exchange Current Density on Electrodeposition Behavior of Lithium Metal

Covalent Organic Frameworks and Their Derivatives for Better Metal Anodes in Rechargeable Batteries

Mesoporous Graphene Hosts for Dendrite-Free Lithium Metal Anode in Working Rechargeable Batteries

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