Jianyu Chen , Tian Kang , Fanlai Zhang , Xudong Chen , Xiaoshi Wang , Yanwen Ma , Jin Zhao
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Interfacial Zn ion capture and desolvation engineering for high-performance Zn metal anode
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.
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)
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