超稳定锌电池的高产量碳点中间层

IF 24.4 1区 材料科学 Q1 CHEMISTRY, PHYSICAL
Hao Zhang, Shuo Li, Laiqiang Xu, Roya Momen, Wengtao Deng, Jiugang Hu, Guoqiang Zou, Hongshuai Hou, Xiaobo Ji
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引用次数: 86

摘要

枝晶生长及其伴随的界面寄生反应严重影响了高容量锌金属阳极的实际应用。,高产碳点(CDs)与充裕的极性官能团(和曹CN),作为一种功能性人工界面层,设计合理优化电解液/锌接口与大规模的可行性。特别值得注意的是,具有强Zn亲和力的量子级CDs可以有效改善电场分布,保证更多的Zn2+吸附在整个电极上,有利于降低Zn2+成核的势垒,诱导均匀的Zn沉积,从而形成无枝晶的Zn阳极,这一点得到了原位光学显微镜观察和有限元模拟的广泛证实。同时,致密的不溶性涂层具有丰富的极性官能团,有利于激发斥力效应,有利于屏蔽活性水和SO42−,从而消除水介导的寄生反应,提高Zn2+反应动力学。更重要的是,电化学稳定的CDs层使锌阳极在1ma cm−2下的寿命延长了3000小时。这种可行而高效的功能CDs层的制备为制备稳定的无枝晶金属阳极开辟了新的途径。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
High-Yield Carbon Dots Interlayer for Ultra-Stable Zinc Batteries

The practical implementation of Zn metal anodes with high volumetric capacity is seriously plagued by the dendritic growth and accompanying interfacial parasitic reactions. Herein, high yield carbon dots (CDs) with abundant polar functional groups (CHO and CN), as a functional artificial interface layer, are rationally designed to optimize electrolyte/Zn interfaces with large-scale viability. Of particular note, the quantum-sized CDs with strong Zn affinity can effectively ameliorate the electric field distribution and ensure that more Zn2+ is adsorbed onto the whole electrode, which are beneficial for lowering the barrier of Zn2+ nucleation and inducing homogeneous Zn deposition, thus rendering a dendrite-free Zn anode, as extensively confirmed by in situ optical microscope observation and finite element simulation. Meanwhile, the dense and insoluble coating layer with abundant polar functional groups is conducive to arousing the repulsion effect, which is good for shielding the active water and SO42−, thus eliminating the water-mediated parasitic reactions and improving Zn2+ reaction kinetics. More importantly, the electrochemically stable CDs layer endows the Zn anode with a prolonged lifespan of 3000 h at 1 mA cm−2. This feasible and efficient fabrication of functional CDs layer opens a new avenue for stable dendrite-free metal anodes.

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来源期刊
Advanced Energy Materials
Advanced Energy Materials CHEMISTRY, PHYSICAL-ENERGY & FUELS
CiteScore
41.90
自引率
4.00%
发文量
889
审稿时长
1.4 months
期刊介绍: Established in 2011, Advanced Energy Materials is an international, interdisciplinary, English-language journal that focuses on materials used in energy harvesting, conversion, and storage. It is regarded as a top-quality journal alongside Advanced Materials, Advanced Functional Materials, and Small. With a 2022 Impact Factor of 27.8, Advanced Energy Materials is considered a prime source for the best energy-related research. The journal covers a wide range of topics in energy-related research, including organic and inorganic photovoltaics, batteries and supercapacitors, fuel cells, hydrogen generation and storage, thermoelectrics, water splitting and photocatalysis, solar fuels and thermosolar power, magnetocalorics, and piezoelectronics. The readership of Advanced Energy Materials includes materials scientists, chemists, physicists, and engineers in both academia and industry. The journal is indexed in various databases and collections, such as Advanced Technologies & Aerospace Database, FIZ Karlsruhe, INSPEC (IET), Science Citation Index Expanded, Technology Collection, and Web of Science, among others.
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