Silver sites guide spatially homogeneous plating of lithium metal in 3D host

Lithium‐metal batteries (LMBs) are regarded as one of the best choices for next‐generation energy storage devices. However, the low Coulombic efficiency, lithium dendrite growth, and volume expansion of lithium‐metal anodes are dragging LMBs out of successful commercialization. Herein, the application of various porous materials in LMBs is focused on. First, several representative works are summarized to highlight the recent key progress of porous materials in LMBs, categorized into current collectors, thin 3D “hosts,” protection layers, and separators. Then, the existing challenges are discussed and future research needs to present more thorough characterizations of porous materials are advocated for, such as their porosity, electric conductivity, specific surface area, and mass density, to elaborate on their positive influence on electrochemical performance. Finally, future strategies with porous materials to build long‐cycle‐life, high‐energy‐density lithium‐metal full cells toward realistic performance targets are envisioned.

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“…Later, similar research was published about establishing a porous Cu current collector in LMBs. [ 72–88 ]…”

Section: Porous Current Collectorsmentioning

confidence: 99%

Recent Progress of Porous Materials in Lithium‐Metal Batteries

et al. 2021

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“…The positive effects of Au, Ag, or ZnO nanoparticles introduced onto the surface of 3D metal current collectors were confirmed in terms of both nucleation overpotentials and CEs. [46][47][48] Accordingly, more advanced nanostructures were developed using lithiated NiCo 2 O 4 nanorods grown on Ni foam to effectively reduce the average current in the electrode (Figure 2a). In addition, the conformal Li 2 O coating produced in situ on lithiated NiCo 2 O 4 nanorods provided a high effective surface area and surface lithiophilicity, thereby enabling stable Li plating/stripping without Li dendrite growth even at a high current density of 5 mA cm −2 .…”

Section: Introduction Of Lithiophilic Inorganic Nanoparticles Onto 3dmentioning

confidence: 99%

Advances in the Design of 3D‐Structured Electrode Materials for Lithium‐Metal Anodes

2020

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In view of their high energy densities, absence of memory effects, and high round-trip energy efficiencies, conventional lithium-ion batteries (LIBs) are widely used on scales ranging from compact electronic devices to grid systems [8,9] but are currently reaching their maximal capacity, as their specific/volumetric energy densities are limited by the use of heavy metal-based active host materials. [10,11] The use of Li as a high-energy active anode material is a possible solution to this problem, as this metal exhibits a high theoretical capacity of ≈3860 mAh g −1 and a low redox potential (−3.040 V vs the standard hydrogen electrode). [12,13] However, the Li-metal anode (LMA) has some fatal drawbacks originating from highaspect-ratio metal growth, e.g., continuous electrolyte consumption, Coulombic efficiency (CE) reduction, elevated cell polarization due to side reactions producing dead Li, and safety issues caused by electrode short-circuiting. [14,15] Recently, these drawbacks have been addressed by several approaches such as electrode design and electrolyte engineering. [16-21] Metal growth can be described by a first-order linear equation as Although the lithium-metal anode (LMA) can deliver a high theoretical capacity of ≈3860 mAh g −1 at a low redox potential of −3.040 V (vs the standard hydrogen electrode), its application in rechargeable batteries is hindered by the poor Coulombic efficiency and safety issues caused by dendritic metal growth. Consequently, careful electrode design, electrolyte engineering, solid-electrolyte interface control, protective layer introduction, and other strategies are suggested as possible solutions. In particular, one should note the great potential of 3D-structured electrode materials, which feature high active specific surface areas and stereoscopic structures with multitudinous lithiophilic sites and can therefore facilitate rapid Li-ion flux and metal nucleation as well as mitigate Li dendrite formation through the kinetic control of metal deposition even at high local current densities. This progress report reviews the design of 3D-structured electrode materials for LMA according to their categories, namely 1) metal-based materials, 2) carbon-based materials, and 3) their hybrids, and allows the results obtained under different experimental conditions to be seen at a single glance, thus being helpful for researchers working in related fields.

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“…All the substrates reported by the previous literature theoretically could serve as the carrier for zinc deposition, while the major difference among them is the intrinsic zinc nucleation overpotentials (abbreviated as ZNO in the following) . Lower ZNO represents lower energy barrier for zinc deposition and a more uniform deposition behavior, ,, which could effectively guarantee the highly reversible plating/stripping behavior and minimize the adverse influences of zinc dendrites or other byproducts. − To effectively enhance the inferior and irreversible plating/stripping behavior of the Zn metal anode, selecting a suitable current collector with low ZNO and highly reversible behavior is the first key point. Meanwhile, depositing metallic zinc on the optimized current collector could be an effective way to prepare Zn@current collector anodes with negligible formation of zinc dendrites and byproducts.…”

Section: Introductionmentioning

confidence: 99%

Homogeneous Deposition of Zinc on Three-Dimensional Porous Copper Foam as a Superior Zinc Metal Anode

Shi

Gong

Liang

et al. 2019

ACS Sustainable Chem. Eng.

172

126

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Metal zinc, with the advantages of low cost, low redox potential, and high capacity, is an ideal anode for aqueous zinc-ion batteries. Nonetheless, the inferior plating/stripping Coulombic efficiency and poor reversibility hinder its practical applications. To address the drawbacks, the zinc nucleation overpotential of different substrates is systematically investigated in asymmetric cells for the first time to confirm the suitable substrate with highly reversible plating/stripping behavior. As a result, Cu foam presents the low zinc nucleation overpotential of 65.2 mV and superior plating/stripping Coulombic efficiency close to 100%. Meanwhile, Cu foam is optimized as the carrier for the deposition of metallic zinc and the preparation of the Zn@Cu foam anode through the electrochemical deposition method. Besides, the Zn@Cu foam anode holds the low initial polarization voltage and stable voltage hysteresis profile with negligible voltage polarization in the symmetric cell. Furthermore, coupled with the β-MnO2 cathode, it could exhibit an outstanding cycling ability with a capacity of 172.8 mA h g–1 after 600 cycles at 1 A g–1 in the full cell, corresponding to an extremely low decay rate of 0.0218% per cycle.

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Silver sites guide spatially homogeneous plating of lithium metal in 3D host

Cited by 37 publications

References 25 publications

Recent Progress of Porous Materials in Lithium‐Metal Batteries

Recent Progress of Porous Materials in Lithium‐Metal Batteries

Advances in the Design of 3D‐Structured Electrode Materials for Lithium‐Metal Anodes

Homogeneous Deposition of Zinc on Three-Dimensional Porous Copper Foam as a Superior Zinc Metal Anode

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