Nanoelectrode design from microminiaturized honeycomb monolith with ultrathin and stiff nanoscaffold for high-energy micro-supercapacitors

Lei, Zhendong; Liu, Long; Zhao, Huihui; Liang, Feng; Chang, Shilei; Li, Lei; Zhang, Yong; Lin, Zhan; Kröger, J.; Lei, Yong

doi:10.1038/s41467-019-14170-6

Cited by 61 publications

(61 citation statements)

References 37 publications

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“…The high specific capacitance of 128 mF cm −2 was achieved at 0.5 mA cm −2 (Figure 28d) along with a high power and energy density of 40 mW cm −2 and 160 mW cm −2 , respectively. [ 344 ] The areal energy density of these micro‐supercapacitors is comparable to that of some state‐of‐the‐art 3D micro‐batteries but with much higher areal power density (Figure 28e). With such a performance, the micro‐supercapacitors shall have the potential for a range of applications from mobile electronics to wireless autonomous sensor networks.…”

Section: Well‐defined Nanostructures For Energy Storage (Metal‐ion Batteries and Supercapacitors)mentioning

confidence: 68%

Section: Metal Oxide-based Wdns For Supercapacitorsmentioning

confidence: 99%

“…d) GCD profiles at different current densities. e) Ragone plots of MSCs with HAN-based nanoelectrodes compared with some reported MSCs.Reproduced with permission [344]. Copyright 2020, Springer Nature.…”

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confidence: 99%

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Well‐Defined Nanostructures for Electrochemical Energy Conversion and Storage

Adekoya

et al. 2020

Advanced Energy Materials

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134

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existing energy supply systems mainly based on fossil fuels, the performance of the clean energy (conversion and storage) devices/systems has to be significantly improved. The electrochemical energy conversion and storage usually involves many intricate chemical reactions and physical interactions at the surface and inside of electrodes/electrolytes, and the kinetics and transport behaviors of different carriers (e.g., electrons, holes, ions, molecules) are closely associated with the materials selected for electrodes as well as the structures of electrodes. To this point, material design and structure design for electrodes have been the research focuses for improving the electrochemical performance of energy conversion and storage, which both have gained high attention from academia and industry.Along with researches for finding advanced electrode materials, much recent research efforts have been made for electrode structure design and engineering, especially when traditional macro-scale structured electrodes are showing limitations of achieving satisfying performance for energy conversion and storage. Among these efforts, electrode nanostructuring has been demonstrated as a promising way for realizing highperformance electrochemical energy conversion and storage, which attributes the distinct features of nanostructured materials differing from their bulk material counterparts. The high surface-to-volume ratios of nanostructures give large electrochemical surface areas with much more exposed atoms and hence improve the performance per unit electrode area and/or Electrochemical energy conversion and storage play crucial roles in meeting the increasing demand for renewable, portable, and affordable power supplies for society. The rapid development of nanostructured materials provides an alternative route by virtue of their unique and promising effects emerging at nanoscale. In addition to finding advanced materials, structure design and engineering of electrodes improves the electrochemical performance and the resultant commercial competitivity. Regarding the structural engineering, controlling the geometrical parameters (i.e., size, shape, heteroarchitecture, and spatial arrangement) of nanostructures and thus forming well-defined nanostructure (WDN) electrodes have been the central aspects of investigations and practical applications. This review discusses the fundamental aspects and concept of WDNs for energy conversion and storage, with a strong emphasis on illuminating the relationship between the structural characteristics and the resultant electrochemical superiorities. Key strategies for actualizing well-defined features in nanostructures are summarized. Electrocatalysis and photoelectrocatalysis (for energy conversion) as well as metal-ion batteries and supercapacitors (for energy storage) are selected to illustrate the superiorities of WDNs in electrochemical reactions and charge carrier transportation. Finally, conclusions and perspectives regarding future research, development, and applications of WDNs...

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Section: Well‐defined Nanostructures For Energy Storage (Metal‐ion Batteries and Supercapacitors)mentioning

confidence: 68%

Section: Metal Oxide-based Wdns For Supercapacitorsmentioning

confidence: 99%

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Well‐Defined Nanostructures for Electrochemical Energy Conversion and Storage

Adekoya

et al. 2020

Advanced Energy Materials

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134

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“…Another effective strategy is to promote the penetration and diffusion of electrolyte ions by reasonable structure and morphology design similar to the optimization of carbon-based materials. For example, Lei et al 106 prepared a microminiaturized honeycomb alumina nanoscaffold. Based on this structure, high performance MSCs with a capacitance of 128 mF cm −2 at 0.5 mA cm −2 was prepared.…”

Section: Pseudo Mscsmentioning

confidence: 99%

Recent developments of advanced micro-supercapacitors: design, fabrication and applications

et al. 2020

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The rapid development of wearable, highly integrated, and flexible electronics has stimulated great demand for on-chip and miniaturized energy storage devices. By virtue of their high power density and long cycle life, micro-supercapacitors (MSCs), especially those with interdigital structures, have attracted considerable attention. In recent years, tremendous theoretical and experimental explorations have been carried out on the structures and electrode materials of MSCs, aiming to obtain better mechanical and electrochemical properties. The high-performance MSCs can be used in many fields, such as energy storage and medical assistant examination. Here, this review focuses on the recent progress of advanced MSCs in fabrication strategies, structural design, electrode materials design and function, and integrated applications, where typical examples are highlighted and analyzed. Furthermore, the current challenges and future development directions of advanced MSCs are also discussed.

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“…The rapid spread and development of the internet of things (IoT) and wearable/implantable medical devices have propelled the miniaturization of electronic devices and achieved great success. [ 1–7 ] However, the common power supply for electronic devices, the battery, has not followed this transformative success. The limited performance of batteries with constrained volumes cannot match the energy demand of miniaturized electronic devices because the energy density declines dramatically as the battery volume decreases.…”

Section: Figurementioning

confidence: 99%

Stress‐Actuated Spiral Microelectrode for High‐Performance Lithium‐Ion Microbatteries

Hong-mei

Karnaushenko²,

Neu³

et al. 2020

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Miniaturization of batteries lags behind the success of modern electronic devices. Neither the device volume nor the energy density of microbatteries meets the requirement of microscale electronic devices. The main limitation for pushing the energy density of microbatteries arises from the low mass loading of active materials. However, merely pushing the mass loading through increased electrode thickness is accompanied by the long charge transfer pathway and inferior mechanical properties for long‐term operation. Here, a new spiral microelectrode upon stress‐actuation accomplishes high mass loading but short charge transfer pathways. At a small footprint area of around 1 mm2, a 21‐fold increase of the mass loading is achieved while featuring fast charge transfer at the nanoscale. The spiral microelectrode delivers a maximum area capacity of 1053 µAh cm−2 with a retention of 67% over 50 cycles. Moreover, the energy density of the cylinder microbattery using the spiral microelectrode as the anode reaches 12.6 mWh cm−3 at an ultrasmall volume of 3 mm3. In terms of the device volume and energy density, the cylinder microbattery outperforms most of the current microbattery technologies, and hence provides a new strategy to develop high‐performance microbatteries that can be integrated with miniaturized electronic devices.

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Nanoelectrode design from microminiaturized honeycomb monolith with ultrathin and stiff nanoscaffold for high-energy micro-supercapacitors

Cited by 61 publications

References 37 publications

Well‐Defined Nanostructures for Electrochemical Energy Conversion and Storage

Well‐Defined Nanostructures for Electrochemical Energy Conversion and Storage

Recent developments of advanced micro-supercapacitors: design, fabrication and applications

Stress‐Actuated Spiral Microelectrode for High‐Performance Lithium‐Ion Microbatteries

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