Synthesis of ZnO tetrapods for high-performance supercapacitor applications

Luo, Qun; Xu, Pingru; Qiu, Yongfu; Cheng, Zhiyu; Chang, Xueyi; Fan, Hongsong

doi:10.1016/j.matlet.2017.04.032

Cited by 52 publications

(14 citation statements)

References 14 publications

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“…T Wurtzite; nanobelt with widths of 10-60 nm, thickness of 5-20 nm and lengths up to several hundreds of micrometers. The excellent [52] Page ZnO nanoparticles with smaller size shows better H 2 evolution rates up to 360 μmol hg −1 . It is noteworthy that ZnO nanoparticles prepared via novel green synthesis exhibits oxygen vacancies and registers enhanced photocatalytic activity as well as good photostability.…”

Section: Nanoscale Advances Accepted Manuscriptmentioning

confidence: 99%

ZnO nanostructured materials and their potential applications: progress, challenges and perspectives

2022

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Section: Nanoscale Advances Accepted Manuscriptmentioning

confidence: 99%

ZnO nanostructured materials and their potential applications: progress, challenges and perspectives

2022

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“…The ZnO tetrapods were prepared by using an oxidative‐metal‐vapor‐transport method. [ 147 ] The tetrarod‐based electrodes showed good capacitive behavior in the negative potential range in 1 m Na 2 SO 4 electrolyte [ 147 ] and good cyclic stability. Such electrodes are promising for the development of asymmetric devices.…”

Section: Co3o4 Nio and Other Oxidesmentioning

confidence: 99%

The Development of Pseudocapacitor Electrodes and Devices with High Active Mass Loading

Chen

Sahu

et al. 2020

Advanced Energy Materials

201

128

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Pseudocapacitive materials are used for supercapacitor applications due to their exceptionally high capacitance and low cost. Good capacitive performance of the pseudocapacitive materials at high active mass loadings is vital for the development of the next generation of supercapacitor devices. This review describes recent advances in materials and nanotechnologies, which allows the development of advanced pseudocapacitive devices with high active mass. An important breakthrough is the discovery of novel dispersing and capping agents for the colloidal processing of nanoparticles. Particularly important are novel co‐dispersants that exhibit enhanced adsorption on materials of different types, such as inorganic nanoparticles, carbon nanotubes, and graphene. Conceptually new strategies are designed to fabricate coated particles. Recent innovations pave the way for the development of multifunctional redox‐active dopants‐dispersants and dopants‐oxidants to manufacture conductive polymer composites. Among the most important advances in nanotechnology is the development of template methods and heterocoagulation techniques for composite manufacturing. The progress in the design of novel surface modification techniques and materials, discovery of advanced anchoring groups, and development of liquid–liquid extraction allows agglomerate‐free processing of nanomaterials and composites. This review describes fundamental aspects of novel technologies and their applications in the manufacturing of pseudocapacitive devices for energy storage.

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“…Alver et al [ 25 ] reported specific capacitance of 5.87 F g −1 , 5.35 F g −1 and 4.14 F g −1 for ZnO electrodes obtained from nitrate, acetate and chloride precursor solutions, respectively. Luo et al [ 26 ] showed maximum capacitance of 160.4 F g −1 for electrodes from ZnO tetrapods. By comparing our results with carbon nanostructures based electrode without metal oxide, it was observed that a capacitance value of 370 F g −1 at 1 A g −1 in 6 M NaOH for graphene, as reported by Xiao et al [ 9 ], is lower than that of the specific capacitance (394 F g −1 ) of our ZnO electrode.…”

Section: Resultsmentioning

confidence: 99%

“…In another work [ 25 ], ZnO particles that were prepared by hydrothermal method with various precursors nitrate, acetate and chloride produced specific capacitance of 5.87 F g −1 , 5.35 F g −1 , and 4.14 F g −1 , respectively. In recent work, Luo et al [ 26 ] showed maximum capacitance value of 160.4 F g −1 for the electrodes that were based on ZnO tetrapods structures. Though the nanocomposites of ZnO and ZnO alone have been demonstrated to exhibit a comparable specific capacitance value [ 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 ], during charge and discharge cycling, a loosely adhered layer on the current collector might be risky and detached from the surface, leading to the poor performance of ZnO electrodes [ 27 , 28 , 29 ].…”

Section: Introductionmentioning

confidence: 99%

Binder-Free Electrode Based on ZnO Nanorods Directly Grown on Aluminum Substrate for High Performance Supercapacitors

et al. 2020

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Herein, for the first time, the growth of ZnO nanorods directly on aluminum (Al) substrate via a low temperature (80 °C) wet chemical method, and used as binder-free electrode for supercapacitors were reported. XRD pattern and HRTEM images showed that high crystalline nanorods grown on Al substrate with c-axis orientation. Morphological studies revealed that the nanorods possessed well defined hexagon phase with length and diameter of ~2 µm and 100–180 nm, respectively. Raman spectrum of ZnO nanorods showed that the characteristic E2H mode corresponds to the vibration associated with the oxygen atoms of ZnO. The optical properties of ZnO nanorods studied using Room-temperature PL spectra revealed a near-band-edge (NBE) peak at ~388 nm emission and deep level (DLE) at ~507 nm. Electrochemical measurements showed that ZnO nanorods on Al substrate exhibited remarkably enhanced performance as electrode for supercapacitors with a value of specific capacitance of 394 F g−1 measured with scan rate of 20 mV s−1. This unique nanorods structures also exhibited excellent stability of >98% capacitance retention for 1000 cycles that were measured at 1A g−1. The presented easy and cost-effective method might open up the possibility for the mass production of binder-free electrodes for efficient electrochemical energy storage devices.

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Synthesis of ZnO tetrapods for high-performance supercapacitor applications

Cited by 52 publications

References 14 publications

ZnO nanostructured materials and their potential applications: progress, challenges and perspectives

ZnO nanostructured materials and their potential applications: progress, challenges and perspectives

The Development of Pseudocapacitor Electrodes and Devices with High Active Mass Loading

Binder-Free Electrode Based on ZnO Nanorods Directly Grown on Aluminum Substrate for High Performance Supercapacitors

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