Hydrothermal preparation of ZnO electrodes synthesized from different precursors for electrochemical supercapacitors

Alver, Ümit; Tanrıverdi, A.; Akgül, Özlem

doi:10.1016/j.synthmet.2015.11.008

Cited by 46 publications

(11 citation statements)

References 30 publications

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“…He et al [ 24 ] reported a value of 378.5 F g −1 for ZnO nanocones and 191.5 F g −1 for ZnO NWs. 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.…”

Section: Resultsmentioning

confidence: 99%

“…He et al [ 24 ] demonstrated the growth of ZnO nanocones that were obtained by chemically etching ZnO nanowires (NWs) and obtained a value of 378.5 F g −1 for ZnO nanocones and 191.5 F g −1 for ZnO NWs, respectively. 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.…”

Section: Introductionmentioning

confidence: 99%

“…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%

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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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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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

et al. 2020

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“…In another study, ZnO particles exhibited good specific capacitances prepared hydrothermally with nitrate (5.87 F•g −1 ), acetate (5.35 F•g −1 ), and chloride (4.14 F•g −1 ) specific capacitance at a 5 mV•s −1 . Moreover, the electrodes' cyclic performances were tested for only 200 cycles [24]. According to the above findings, despite the fact that nanocomposites with zinc and ZnO pristine had also been observed to have similar capacitance values with other metal oxides although they are not very competitive [20,25].…”

Section: Introductionmentioning

confidence: 81%

ZnO Nano-Flowers Assembled on Carbon Fiber Textile for High-Performance Supercapacitor’s Electrode

et al. 2021

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Herein, a crystalline nano-flowers structured zinc oxide (ZnO) was directly grown on carbon fiber textile (CFT) substrate via a simple hydrothermal process and fabricated with a binder-free electrode (denoted as ZnO@CFT) for supercapacitor (SC) utilization. The ZnO@CFT electrode revealed a 201 F·g−1 specific capacitance at 1 A·g−1 with admirable stability of >90% maintained after 3000 cycles at 10 A·g−1. These impressive findings are responsible for the exceedingly open channels for well-organized and efficient diffusion of effective electrolytic conduction via ZnO and CFT. Consequently, accurate and consistent structural and morphological manufacturing engineering is well regarded when increasing electrode materials’ effective surface area and intrinsic electrical conduction capability. The crystalline structure of ZnO nano-flowers could pave the way for low-cost supercapacitors.

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“…Carbon based materials, such as activated carbon, carbon nanotube and graphene are used as electrode materials for EDLCs store energy in the electrostatic field. Transition metal oxides, such as Fe 3 O 4 , Co 3 O 4 , NiO, MnO 2 , ZnO, SnO 2 , V 2 O 5 and its based sulfides are usually employed as electrode materials for pseudocapacitors that mainly rely on their fast and reversible redox reactions. Especially, binary metal oxides and its based sulfides, such as NiMoO 4 , NiWO 4 , ZnCo 2 O 4 , NiCo 2 S 4 , CuCo 2 O 4 and NiCo 2 O 4 have been reported to deliver a higher electrochemical performance than single component oxides due to their feasible oxidation state.…”

Section: Introductionmentioning

confidence: 99%

Hydrothermal Synthesis of NiCo₂O₄/Activated Carbon Composites for Supercapacitor with Enhanced Cycle Performance

Liu

Peng

et al. 2017

ChemistrySelect

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Owing to the advantages of the good conductive AC and high capacitive NiCo 2 O 4 , We prepared a series of NiCo 2 O 4 /AC composites by a hydrothermal method. The morphology of NiCo 2 O 4 /AC composites indicate the NiCo 2 O 4 nanoplates with diameters of about 0.5~1 mm and thickness of about 20 nm are coated on AC. The electrochemical investigation demonstrate that the specific capacitances of NCO-AC-3 (containing 47 % NiCo 2 O 4 ) are 273.5 F g À1 and the capacity retention still retains at 96 % (262.6 F g À1 ) after 3000 cycles at current density of 1 Ag À1 , especially, the cycling stability maintain more stable at high current density. Therefore, the low-cost NiCo 2 O 4 /AC composites can serve as a promising electrode material for high performance supercapacitors due to the synergistic effect between the electric double-layer capacitance of porous AC and the pseudocapacitance of NiCo 2 O 4 nanoplates.[a] Dr.

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Hydrothermal preparation of ZnO electrodes synthesized from different precursors for electrochemical supercapacitors

Cited by 46 publications

References 30 publications

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

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

ZnO Nano-Flowers Assembled on Carbon Fiber Textile for High-Performance Supercapacitor’s Electrode

Hydrothermal Synthesis of NiCo₂O₄/Activated Carbon Composites for Supercapacitor with Enhanced Cycle Performance

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Hydrothermal preparation of ZnO electrodes synthesized from different precursors for electrochemical supercapacitors

Cited by 46 publications

References 30 publications

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

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

ZnO Nano-Flowers Assembled on Carbon Fiber Textile for High-Performance Supercapacitor’s Electrode

Hydrothermal Synthesis of NiCo2O4/Activated Carbon Composites for Supercapacitor with Enhanced Cycle Performance

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Hydrothermal Synthesis of NiCo₂O₄/Activated Carbon Composites for Supercapacitor with Enhanced Cycle Performance