Interfacial Zn ion capture and desolvation engineering for high-performance Zn metal anode

IF 5.9 3区材料科学 Q2 CHEMISTRY, PHYSICAL

FlatChem Pub Date : 2024-06-10 DOI:10.1016/j.flatc.2024.100695

Jianyu Chen , Tian Kang , Fanlai Zhang , Xudong Chen , Xiaoshi Wang , Yanwen Ma , Jin Zhao

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Abstract

The uneven surface of planar zinc (Zn) metal anodes fundamentally reduces the electrochemical reversibility of aqueous Zn metal batteries due to dendritic growth. Herein, an interphase protection layer engineering is formed on the surface of the Zn metal anode through a solution-processed coating method. This interesting carbon layer, composed of carbon nanoparticles obtained from outer flame-derived candle soot (OFCS), exhibits excellent Zn ion capturing and storage capabilities, effectively reducing the accumulation of charge density on the Zn metal surface, providing a homogeneous Zn ion flux and inducing even Zn metal deposition. The OFCS@Zn can promote the desolvation of [Zn(H₂O)₆]²⁺ through strong interaction with Zn ions, mitigating corrosion and hydrogen evolution reactions. The multifunctional integration of the OFCS layer synergistically induces uniform Zn metal plating and inhibits side reactions. Consequently, in the OFCS @Zn | OFCS @Zn symmetric-cell tests, high-rate performance and deep charge/discharge capabilities are demonstrated. The OFCS@Zn anode-based pouch cell exhibits a high discharge capacity of 156.2 mAh g^-1 and maintains a significant capacity retention rate of 95.4 % for 200 cycles at the current density of 1 A g^-1, indicating its potential for enhanced battery stability and efficiency.

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用于高性能锌金属阳极的界面锌离子捕获和脱溶工程

由于树枝状生长，平面锌（Zn）金属阳极凹凸不平的表面从根本上降低了水溶液锌金属电池的电化学可逆性。在这里，通过一种溶液加工涂层方法，在锌金属阳极表面形成了一种相间保护层工程。这种有趣的碳层由从外焰烛烟（OFCS）中获得的碳纳米颗粒组成，具有出色的锌离子捕获和存储能力，可有效降低锌金属表面的电荷密度积累，提供均匀的锌离子通量，并诱导锌金属均匀沉积。OFCS@Zn 能通过与 Zn 离子的强相互作用促进 [Zn(H2O)6]2+ 的脱溶，缓解腐蚀和氢演化反应。OFCS 层的多功能集成协同诱导了均匀的锌金属镀层，并抑制了副反应。因此，在 OFCS @Zn | OFCS @Zn 对称电池测试中，显示出了高倍率性能和深度充放电能力。基于 OFCS@Zn 阳极的袋式电池显示出 156.2 mAh g-1 的高放电容量，并且在 1 A g-1 的电流密度下循环 200 次仍能保持 95.4% 的显著容量保持率，这表明它具有提高电池稳定性和效率的潜力。

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来源期刊

FlatChem Multiple-

CiteScore

8.40

自引率

6.50%

发文量

104

审稿时长

26 days

期刊介绍： FlatChem - Chemistry of Flat Materials, a new voice in the community, publishes original and significant, cutting-edge research related to the chemistry of graphene and related 2D & layered materials. The overall aim of the journal is to combine the chemistry and applications of these materials, where the submission of communications, full papers, and concepts should contain chemistry in a materials context, which can be both experimental and/or theoretical. In addition to original research articles, FlatChem also offers reviews, minireviews, highlights and perspectives on the future of this research area with the scientific leaders in fields related to Flat Materials. Topics of interest include, but are not limited to, the following: -Design, synthesis, applications and investigation of graphene, graphene related materials and other 2D & layered materials (for example Silicene, Germanene, Phosphorene, MXenes, Boron nitride, Transition metal dichalcogenides) -Characterization of these materials using all forms of spectroscopy and microscopy techniques -Chemical modification or functionalization and dispersion of these materials, as well as interactions with other materials -Exploring the surface chemistry of these materials for applications in: Sensors or detectors in electrochemical/Lab on a Chip devices, Composite materials, Membranes, Environment technology, Catalysis for energy storage and conversion (for example fuel cells, supercapacitors, batteries, hydrogen storage), Biomedical technology (drug delivery, biosensing, bioimaging)