Vapor-phase crystallization route to oxidized Cu foils in air as anode materials for lithium-ion batteries

2014

Funct. Mater. Lett.

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Cu-based materials, including metal Cu and semiconductors of Cu 2 O and CuO, are promising and important candidates toward practical electrochemical energy storage devices due to their abundant, low cost, easy synthesis and environmentally friendly merits. This review presents an overview of the applications of Cu-based materials in the state-of-art electrochemical energy storage, including both lithium-ion batteries and supercapacitors. The synthesis chemistry, structures and the corresponding electrochemical performances of these materials are summarized and compared. During chemical synthesis and electroactive performance measurement of Cu-based materials, we found that Cu-Cu 2 O-CuO sequence governs all related transformations. Novel water-soluble CuCl 2 supercapacitors with ultrahigh capacitance were also reviewed which can advance the understanding of intrinsic mechanism of inorganic pseudocapacitors. The major goal of this review is to highlight some recent progresses in using Cu-based materials for electrochemical energy storage.

Section: Integrated Cu Electrodes For Li-ion Batteriesmentioning

confidence: 99%

Section: Integrated Cu Electrodes For Li-ion Batteriesmentioning

confidence: 99%

Cu-based materials as high-performance electrodes toward electrochemical energy storage

2014

Funct. Mater. Lett.

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“…The direct growth of Cu-based active materials on copper foil can provide a flexible method to construct integrated electrode. With copper foil as copper source, Cu-based materials can be formed by oxidizing copper foil in vapor or solution.Recently, we reported a facile vapor-phase strategy for the crystallization of copper oxide on Cu foil substrate in air and the further fabrication of integrated Cu x O-Cu electrodes with Cu x O readily on the Cu foil current collector, without using conductive carbon and binder[58]. The integrated Cu x O-Cu electrodes can show better cycling stability and higher capability than those Cu x O-C blended electrodes.By wet chemical reaction route, CuO microsheets grown on the Cu current collector were also formed by the oxidation of metal Cu foil with (NH 4 ) 2 S 2 O 8 in alkaline aqueous solution (Fig.…”

mentioning

confidence: 96%

Searching for electrode materials with high electrochemical reactivity

2015

Journal of Materiomics

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The most key materials in electrochemical energy storage devices are electrode materials mainly including inorganic cathode and anode materials. However, inorganic electroactive materials often suffer from low conductivity, low capacity, low cycling life. In order to solve these problems, much research work focused on the design of electrode materials and the construction of novel electrode structures in the field of electrochemical energy storage. In this review, we reported the latest development of the design principles of the high-performance electrodes for lithium ion batteries and supercapacitors. We mainly discussed three kinds of examples, blended electrode, integrated electrode and in-situ formed electrode, to display the principles of electrode materials design and electrode construction. The new-developed integrated electrode and in-situ formed electrode maybe the promising candidates for next-generation high-performance energy storage devices. In addition, we conclude this review with personal perspectives on the directions toward which future research in this field might take.

“…Low temperature and in-situ electrochemical reaction routes have been designed for the synthesis of (Figure 3c-g) [35][36][37].…”

Section: +mentioning

confidence: 99%

Nanofabrication strategies for advanced electrode materials

2017

Nanofabrication

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Advanced energy storage devices, i.e., Li-ion battery, supercapacitor, need high electroactive metal oxide materials with stable structure during charging/ discharging cycling [1][2][3]. However, metal oxide electrode materials often suffer from low conductivity, and slow ion diffusion rate during electrochemical redox reaction. In recent years, lots of efforts are done to design nanostructured materials to enhance their function. When downsizing to nanosize, the electroactive areas of materials are increased and ion/electron diffusion length is shortened, and therefore specific capacitance of active materials is significantly enhanced [4][5][6]. For example, 3D holey-graphene/niobia composite architectures have been designed to show ultrahigh-rate energy storage performance [7]. The highly interconnected graphene network in the 3D architecture shows excellent electron transport properties, while its hierarchical porous structure enables rapid ion transport. Although the nanostructured materials have shown extraordinary promise for electrochemical energy storage, most of the existing synthesis techniques require multistep and laborious procedures [8,9]. The dual pressure of energy needs and environmental requirements in society demand the rapid screening of exceptional performance materials to shorten R&D of advanced energy storage devices. As shown in Figure 1a, R&D of electrode materials mainly includes structure & component design, materials synthesis and performance evaluation. During these processes, materials synthesis often need longer time and complex equipments, which increase the finding time of new electrode materials. The development of easy and fast nanofabrication strategy can accelerate finding rate of new electrode materials in laboratory (Figure 1b). Furthermore, with creative design idea, the material synthesis process can be replaced or fused into one structure-performance process (Figure 1c), which not only accelerate the finding rate of new electrode materials, but also decrease the cost of searching new electrode materials. Abstract: The development of advanced electrode materials for high-performance energy storage devices becomes more and more important for growing demand of portable electronics and electrical vehicles. To speed up this process, rapid screening of exceptional materials among various morphologies, structures and sizes of materials is urgently needed. Benefitting from the advance of nanotechnology, tremendous efforts have been devoted to the development of various nanofabrication strategies for advanced electrode materials. This review focuses on the analysis of novel nanofabrication strategies and progress in the field of fast screening advanced electrode materials. The basic design principles for chemical reaction, crystallization, electrochemical reaction to control the composition and nanostructure of final electrodes are reviewed. Novel fast nanofabrication strategies, such as burning, electrochemical exfoliation, and their basic principles are also summarized. More im...