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2D inorganic nanosheets as versatile building blocks for hybrid electrode materials for supercapacitor
Coordination Chemistry Reviews ( IF 20.3 ) Pub Date : 2020-07-01 , DOI: 10.1016/j.ccr.2020.213439
Tae-Ha Gu , Nam Hee Kwon , Kang-Gyu Lee , Xiaoyan Jin , Seong-Ju Hwang

Among many classes of nanostructured inorganic solids, two-dimensional (2D) inorganic nanosheets (NSs) have attracted intense research activities because of their unique advantages as versatile building blocks for efficient hybrid electrodes for energy storage technologies like supercapacitors and secondary batteries. The highly anisotropic morphology, greatly expanded surface area with presence of many active sites, and tunable chemical composition with large concentration of redoxable component ions provide 2D inorganic NSs with high electrochemical activity. The hybridization with 2D inorganic NSs can provide effective synthetic ways to explore high-performance supercapacitor electrode materials with expanded surface area, enlarged voltage window, improved electrical conductivity, and enhanced specific capacitance. In this review, wide spectrum of 2D inorganic NS-based electrodes are presented with respect to their synthetic strategies and chemical compositions. The 2D inorganic NS-based electrodes can be synthesized by several synthetic strategies like intercalative hybridization, stacking control, core–shell architecture, surface anchoring, and defect control. Lots of promising supercapacitor electrodes are developed with diverse 2D inorganic NS including metal oxide, metal chalcogenide, metal hydroxide, metal carbide, metal pnictogenide, metal–organic framework, and carbonaceous compounds. The in-depth discussions about advanced approaches for elucidating the operation mechanism of supercapacitor electrodes are discussed on the basis of up-to-date characterization techniques such as spectroscopic and diffraction analyses, theoretical calculation, and in-situ characterization techniques. The great diversity and controllability of the chemical composition, surface property, and defect structure of inorganic NSs can offer valuable opportunity to optimize the supercapacitor electrode performance of 2D NS-based hybrid materials via the fine-tuning of conductivity, electrochemical kinetics, ion absorption affinity, and interfacial electronic interaction. Future directions and challenges in the researches for 2D inorganic NS-based hybrid electrodes for supercapacitors are discussed to offer insight for the exploration of next-generation supercapacitor electrode materials.



中文翻译:

二维无机纳米片作为超级电容器混合电极材料的通用构建基块

在许多种类的纳米结构无机固体中,二维(2D)无机纳米片(NSs)吸引了广泛的研究活动,这是因为它们作为用于超级电容器和二次电池等储能技术的高效混合电极的通用构建块,具有独特的优势。高度各向异性的形态,具有许多活性位点的存在大大扩展的表面积以及具有高浓度的可氧化成分离子的可调谐化学组成为二维无机NS提供了高电化学活性。与2D无机NSs的杂交可提供有效的合成方法,以探索具有扩大的表面积,扩大的电压窗口,改善的电导率和增强的比电容的高性能超级电容器电极材料。在这篇评论中 关于其合成策略和化学组成,提出了基于2D无机NS的二维宽电极。二维基于无机NS的电极可以通过几种合成策略进行合成,例如插层杂交,堆叠控制,核壳结构,表面锚固和缺陷控制。许多有前途的超级电容器电极都是用多种2D无机NS制成的,包括金属氧化物,金属硫属元素化物,金属氢氧化物,金属碳化物,金属碳素化物,金属有机骨架和含碳化合物。基于最新的表征技术,如光谱分析和衍射分析,理论计算和分析,对阐明超级电容器电极工作机理的高级方法进行了深入讨论。二维基于无机NS的电极可以通过几种合成策略进行合成,例如插层杂交,堆叠控制,核壳结构,表面锚固和缺陷控制。许多有前途的超级电容器电极都是用多种2D无机NS制成的,包括金属氧化物,金属硫属元素化物,金属氢氧化物,金属碳化物,金属碳素化物,金属有机骨架和含碳化合物。在阐述光谱和衍射分析,理论计算和分析等最新表征技术的基础上,对阐明超级电容器电极操作机理的高级方法进行了深入讨论。二维基于无机NS的电极可以通过几种合成策略进行合成,例如插层杂交,堆叠控制,核壳结构,表面锚固和缺陷控制。许多有前途的超级电容器电极都是用多种2D无机NS制成的,包括金属氧化物,金属硫属元素化物,金属氢氧化物,金属碳化物,金属碳素化物,金属有机骨架和含碳化合物。在阐述光谱和衍射分析,理论计算和分析等最新表征技术的基础上,对阐明超级电容器电极操作机理的高级方法进行了深入讨论。许多有前途的超级电容器电极都是用多种2D无机NS制成的,包括金属氧化物,金属硫属元素化物,金属氢氧化物,金属碳化物,金属碳素化物,金属有机骨架和含碳化合物。基于最新的表征技术,如光谱分析和衍射分析,理论计算和分析,对阐明超级电容器电极工作机理的高级方法进行了深入讨论。许多有前途的超级电容器电极都是用多种2D无机NS制成的,包括金属氧化物,金属硫属元素化物,金属氢氧化物,金属碳化物,金属碳素化物,金属有机骨架和含碳化合物。在阐述光谱和衍射分析,理论计算和分析等最新表征技术的基础上,对阐明超级电容器电极操作机理的高级方法进行了深入讨论。原位表征技术。无机NSs的化学组成,表面性质和缺陷结构的多样性和可控性可为通过基于电导率,电化学动力学,离子吸收亲和力的微调来优化基于2D NS的混合材料的超级电容器电极性能提供宝贵的机会以及界面电子交互。讨论了用于超级电容器的基于2D无机NS的混合电极的研究的未来方向和挑战,为探索下一代超级电容器电极材料提供了见识。

更新日期:2020-07-02
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