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Metal Anode - Europe PMC

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Last Updated: 06 May 2022

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Advanced Anode Materials for Sodium-Ion Batteries: Confining Polyoxometalates in Flexible Metal-Organic Frameworks by the "Breathing Effect".

Polyoxometalates have demonstrated tremendous promise in sodium-ion batteries due to their reversible multielectron redox property and high ionic conductivity. For the first time, herein, a line of POMs/metal-organic frameworks/graphene oxide composites are produced as SIB anode materials. Unlike MIL-101 with large pore structures, the pores in MIL-53 and MIL-88B's floppy MIL-53 and MIL-88B swell spontaneously on PMo 12's accommodation. The PMo 12 /MIL-88B/GO composites have an outstanding specific capacity of 214. 2 mAh -1 for 600 cycles at 2. 0 A g -1, with a high initial Coulombic yield of 51%.

Source link: https://europepmc.org/article/MED/35510903


Molecular Insights into the Structure and Property Variation of the Pressure-Induced Solid Electrolyte Interphase on a Lithium Metal Anode.

SEI growth and properties are dependent on the inevitable strain posed by the Li-metal anode expansion/contraction and battery encapsulation. Also, a phase diagram is developed to ensure the proper trade-off between SEI mechanical and transport properties can be achieved by the high salt concentration when Young's modulus increases at the same time as the pressure and salt concentration increases. The results not only provide molecular insight into the SEI structure variation, but also provide recommendations and recommendations for maximizing the pressure-induced SEI properties toward high-performance LMBs.

Source link: https://europepmc.org/article/MED/35500233


Room-temperature–low-pressure-operating high-energy lithium metal batteries employing garnet-type solid electrolytes and anode interlayers

Lithium metal batteries are considered the most promising next-generation battery system due to their high energy density and safety. We also showed that the interlayer-to-solid electrolyte interface condition is crucial, and that an efficient approach to achieve an optimal interface. Overall, our garnet-type oxide-based LMB had a high energy density of 680 Wh/L for over 800 cycles at room temperature without using external pressure.

Source link: https://europepmc.org/article/PPR/PPR488427


Dual-Layered Interfacial Evolution of Lithium Metal Anode: SEI Analysis via TOF-SIMS Technology.

Due to its high energy density, Lithium metal battery has been chosen as one of the most promising candidates for the next generation of energy storage systems. The solid electrolyte interface layer was found to influence the lithium metal anode's interface stability; the actual structure of SEI could not be accurately evaluated so far. Due to its excellent sensitivity, time-of-flight secondary ion mass spectrometry has been widely used to perform three-dimensional analysis and structural reconstruction at a high-resolution nanoscale, as well as detect ionized elements and molecule fragments at a ppb scale. Following electrochemical cycles, we employed TOF-SIMS to investigate the chemical composition of SEI at the surface of the lithium metal anode. However, TOF-SIMS can determine the change degree of SEI by analyzing lithium salt distribution.

Source link: https://europepmc.org/article/MED/35470659


One-Pot Preparation of Lithium Compensation Layer, Lithiophilic Layer, and Artificial Solid Electrolyte Interphase for Lean-Lithium Metal Anode.

Lithium metal, which is a common anode for high-density batteries, is a popular anode for high-energy-density batteries. During deposition, the optimized anode could properly stimulate homogeneous reversible lithium deposition under the synergistic effect of multilayer films while still maintaining the morphological structure that was unbroken during deposition. The presence of the lithium compensation layer allows the half-cell to achieve a maximum initial CE of 158. 9%, and the LiF layer and lithophilic layer maintains an average CE of 98. 8% over 160 cycles, which further illustrates the structure's stability.

Source link: https://europepmc.org/article/MED/35451826


Amine-Wetting-Enabled Dendrite-Free Potassium Metal Anode.

The potassium metal battery, which is considered as a viable alternative to the commercial LiFePO 4 battery, has a large supply of potassium, low cost, low standard redox potential, and a high abundance of potassium. The potassium dendrite growth, large volume rise, and a turbulent solid electrolyte interphase on the potassium metal anode have, however, hampered its use. Herein, we suggest a quick and cost-effective method to produce dendrite-free and useful carbon-based potassium composite anodes by amine functionalization of the carbon scaffolds, which allows quick molten potassium infusion within seconds. For a high current of 1 A g -1, the fabricated K 0. 7 Mn 0. 7 Ni 0. 3 O 2 |K@CC full cell has excellent rate stability and an extremely long life over 8000 cycles.

Source link: https://europepmc.org/article/MED/35445597


Cyclohexanedodecol-Assisted Interfacial Engineering for Robust and High-Performance Zinc Metal Anode.

Aqueous zinc-ion batteries can be one of the most commonly used electrochemical energy storage units for being non-flammable, low-cost, and environmentally friendly. To solve these challenges, we firstly established [Zn 5 ] 2+ complicated ion in aqueous Zn electrolyte and then build a robust protective layer on the Zn surface to solve these problems. The resultant AZIB full cell with the CHD-modified electrolyte has a high capacity of 175 mAh g -1 after 1992 cycles under 2 A g -1. Such a result could result in the commercialization of AZIBs for use in grid energy storage and industrial energy storage.

Source link: https://europepmc.org/article/MED/35441329


Co-Solvent Electrolyte Engineering for Stable Anode-Free Zinc Metal Batteries.

Anode-free metal batteries may have higher energy density in principle, but they must have extraordinary Coulombic efficiency in order to achieve this. Although Zn-based metal batteries are intended for stationary storage, the parasitic component reactions make anode-free batteries difficult to obtain in practice. And at a low salt concentration, it has been shown that triflate anions are involved in the Zn 2+ solvation sheath structure in the presence of propylene carbonate, according to the report. With reduced water content in the hybrid electrolyte, the waterproof interphase effectively eliminates side reactions, assuaging a stable Zn anode with unprecedented Coulombic efficiency.

Source link: https://europepmc.org/article/MED/35436108


A Dendrite-Free Lithium Metal Anode Enabled by Designed Ultra-Thin MgF 2 Nanosheets Encapsulated inside Nitrogen-Doped Graphene-Like Hollow Nanospheres.

Uncontrolled lithium dendrite growth and rapid volume change during cycling have long hampered Li metal's practical uses as the ultimate anode. To solve these problems by a perfect blend of atomic layer deposition and chemical vapor deposition, we ingeniously produce ultra-thin MgF 2 nanosheets encapsulated inside nitrogen-doped graphene-like hollow nanospheres herein. The MgF 2 nanosheet's consistent and consistent inner layer can reduce the nucleation overpotential and promote selective deposition of Li in NGHS cavities.

Source link: https://europepmc.org/article/MED/35417929


Confined Lithium Deposition Triggered by an Integrated Gradient Scaffold for a Lithium-Metal Anode.

Constructing a robust lithium anode with a modular framework has been deemed as a cost-effective way to control and solve the tense problems of a new Li anode's elusive problems. The danger that Li deposition at the surface of the framework's structure has yet to be addressed due to the possibility of short circuits. Significant changes in the morphological stability and electrochemical results have been made by the triple-gradient structure of modified porous copper with electrical passivation and chemical activation. In addition, in situ Li 2 Se fabrication can be used to produce homogeneous Li plating/stripping.

Source link: https://europepmc.org/article/MED/35403422

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions

* Please keep in mind that all text is summarized by machine, we do not bear any responsibility, and you should always check original source before taking any actions