Inorganic–Organic Coating via Molecular Layer Deposition Enables Long Life Sodium Metal Anode

Zhao, Yang; Гончарова, Л. В.; Zhang, Qian; Kaghazchi, Payam; Sun, Qian; Wang, Biqiong; Li, Ruying; Sun, Xueliang

doi:10.1021/acs.nanolett.7b02464

Cited by 254 publications

(189 citation statements)

References 31 publications

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“…Communications 736 www.angewandte.org and feasible approach to suppress undesirable gas evolution than searching for a" stable" solvent. [9,16] In conclusion, the concept of ion-solvent complexes promoting gas evolution from electrolytes on alkali metal anodes is theoretically and experimentally verified. Ioncontaining solutions suffer from much more violent gas evolution on Na than in pure solvents,w hich is attributed to the lower LUMO level of the ion-solvent complex than that of the corresponding solvent.…”

Section: Angewandte Chemiementioning

confidence: 81%

Ion–Solvent Complexes Promote Gas Evolution from Electrolytes on a Sodium Metal Anode

et al. 2017

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Lithium and sodium metal batteries are considered as promising next-generation energy storage devices due to their ultrahigh energy densities. The high reactivity of alkali metal toward organic solvents and salts results in side reactions, which further lead to undesirable electrolyte depletion, cell failure, and evolution of flammable gas. Herein, first-principles calculations and in situ optical microscopy are used to study the mechanism of organic electrolyte decomposition and gas evolution on a sodium metal anode. Once complexed with sodium ions, solvent molecules show a reduced LUMO, which facilitates the electrolyte decomposition and gas evolution. Such a general mechanism is also applicable to lithium and other metal anodes. We uncover the critical role of ion-solvent complexation for the stability of alkali metal anodes, reveal the mechanism of electrolyte gassing, and provide a mechanistic guidance to electrolyte and lithium/sodium anode design for safe rechargeable batteries.

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Section: Angewandte Chemiementioning

confidence: 81%

Ion–Solvent Complexes Promote Gas Evolution from Electrolytes on a Sodium Metal Anode

et al. 2017

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“…The application of MLD alucone protective coating on Na metal anodes also achieved similar improvements in the electrolyte of NaPF 6 in EC/PC ( Figure 6F). 102 Compared with pristine Na foil, Na@25alucone showed significantly enhanced electrochemical stripping/ plating performance under different current densities from 1 to 3 mA cm À2 . With 25 cycles of alucone coating, Na dendrite growth was effectively reduced.…”

Section: Ald/mld To Address Interfacial Problems In Ssbsmentioning

confidence: 96%

Addressing Interfacial Issues in Liquid-Based and Solid-State Batteries by Atomic and Molecular Layer Deposition

Zhao

Zheng

Sun

2018

Joule

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Solid-state batteries (SSBs) have attracted increasing attention as one of the most promising next-generation batteries. However, various challenges remain for SSBs toward practical applications. Particularly, the interfacial issues between solid-state electrolyte (SSEs) and electrodes are critical factors affecting the performances of SSBs. Atomic and molecular layer deposition (ALD and MLD) are considered as ideal strategies for overcoming the interfacial issues facing SSBs. In the past years, promising progress has been reported using ALD/MLD to overcome the interfacial drawbacks in SSBs. In this Review, we summarize the recent progress of ALD/MLD techniques in the application of Li batteries, with a special focus on current progress in the shift from liquid to solid cells. Different sections, including the fabrication of interfacial materials, interfacial engineering on SSEs and electrodes, and thinfilm/3D SSBs, are discussed in detail. Moreover, the future directions and perspectives of ALD/MLD in interface engineering for SSBs are disclosed.

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“…Molecular layer deposition (MLD), as an analogy of ALD, can be employed to produce pure polymeric thin films or inorganic–organic hybrid thin films, which can hold many advantages such, as lower growth temperatures, tunable thermal stability, and improved mechanical properties . Furthermore, the toughness and flexibility of polymeric metal thin films by MLD are strengthened with the introduction of CC and CO bonds in this system, which is expected to accommodate its huge volume expansion and dendrite growth of Li metal anode …”

Section: Introductionmentioning

confidence: 99%

Robust Metallic Lithium Anode Protection by the Molecular‐Layer‐Deposition Technique

et al. 2018

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The Li metal anode is considered as a promising alternative candidate for next‐generation Li metal batteries with high specific capacity, low potential, and light weight. However, the crucial problem for the Li metal anode is one of the biggest challenges. Mossy or dendritic growth of Li occurs in the repetitive Li stripping/plating process with an unstable solid electrolyte interphase (SEI) layer of nonuniform ionic flux, which can not only lead to low Coulombic efficiency, but can also create the risk of a short‐circuit, resulting in possible burning or explosion. Here, an advanced molecular‐layer‐deposition (MLD) Alucone protective layer is first demonstrated for Li metal anodes. By protecting Li foil with a controllable Alucone layer, the dendrites and mossy Li formation are effectively suppressed and the lifetime is significantly improved in different electrolytes (carbonate‐based and ether‐based). Furthermore, the detailed surface changes are studied by the advanced characterization technique of Rutherford backscattering spectrometry. The novel design of the MLD‐protected Li metal anode may bring in new opportunities to the realization of the next‐generation high‐energy‐density Li metal batteries.

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Inorganic–Organic Coating via Molecular Layer Deposition Enables Long Life Sodium Metal Anode

Cited by 254 publications

References 31 publications

Ion–Solvent Complexes Promote Gas Evolution from Electrolytes on a Sodium Metal Anode

Ion–Solvent Complexes Promote Gas Evolution from Electrolytes on a Sodium Metal Anode

Addressing Interfacial Issues in Liquid-Based and Solid-State Batteries by Atomic and Molecular Layer Deposition

Robust Metallic Lithium Anode Protection by the Molecular‐Layer‐Deposition Technique

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