Flexible Co(OH)2/NiOxHy@Ni hybrid electrodes for high energy density supercapacitors

Zhao, Feng; Zheng, Donghui; Liu, Yang; Pan, Fengda; Deng, Qibo; Qin, Chunling; Li, Yongyan; Wang, Zhifeng

doi:10.1016/j.cej.2021.128871

Cited by 64 publications

(39 citation statements)

References 65 publications

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“…Furthermore, the highest capacitance of CPCC@CuO@Mn(OH) 2 can reach 8140 mF cm –2 (mean: 1879.9 F g –1 ) under 0.5 mA cm –2 (amount to 115.5 mA g –1 ). The maximum capacitance, exhibited in Table S1, is overwhelming high in comparison to the foregone research maximum value of Mn(OH) 2 specimens, even most Mn-based materials, ,− proving that the CPCC@CuO@Mn(OH) 2 material has excellent electrochemical performance.…”

Section: Resultsmentioning

confidence: 97%

In Situ Growth of 3D Lamellar Mn(OH)₂ on CuO-Coated Carbon Cloth for Flexible Asymmetric Supercapacitors with a High Working Voltage of 2.4 V

Gong

Shi

et al. 2021

ACS Sustainable Chem. Eng.

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Flexible asymmetric supercapacitor (FASC) systems are expected to exhibit not only excellent energy storage properties and safety but also satisfactory flexibility and robust integration. However, tremendous issues such as low capacitance, narrow voltage window, and poor mechanical properties still exist. In this paper, a novel kind of 3D lamellar Mn(OH) 2 nanosheets on Cu-plated carbon cloth with a core-shell integrated framework (CPCC@CuO@Mn(OH) 2 ) is fabricated to obtain the flexible material in the FASC. In this unique CPCC@CuO@Mn(OH) 2 electrode material, the high theoretical specific capacity of CuO and Mn(OH) 2 brings superior energy storage properties. Meanwhile, as the shell part, the deposited Mn(OH) 2 layer and coated CuO layer work as both capacity contributors and substrate protectors, simultaneously maintaining the high capacitance and satisfactory flexibility of the electrodes. Therefore, the capacitance successfully achieves around 8140 mF cm −2 under 0.5 mA cm −2 . Significantly, the assembled FASC (named as CPCC@CuO@Mn(OH) 2 //CC@AC) achieves a working voltage of up to 2.4 V. In the case of a high-power density close to 34.31 mW cm −3 , its energy density reaches around 6.29 mW h cm −3 . Moreover, the capacity holds 88.9% even after 10,000 cycles, showing its great application potential in the field of wearable electronics.

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Section: Resultsmentioning

confidence: 97%

In Situ Growth of 3D Lamellar Mn(OH)₂ on CuO-Coated Carbon Cloth for Flexible Asymmetric Supercapacitors with a High Working Voltage of 2.4 V

Gong

Shi

et al. 2021

ACS Sustainable Chem. Eng.

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“…When the charge storage mechanism was evaluated based on the equation in the literature, i = av b , where i is the current density of the redox peak, v is the scan rate, and a and b are adjustment values. The value of b is important, representing diffusion-controlled battery behavior for b = 0.5 or a surface-controlled capacitive process when b = 1.…”

Section: Resultsmentioning

confidence: 99%

Nitrate Precursor Driven High Performance Ni/Co-MOF Nanosheets for Supercapacitors

Yang

Hong

et al. 2022

ACS Appl. Nano Mater.

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The precursor influences on Ni/Co metal−organic frameworks' (Ni/Co-MOFs') structure and electrochemical performances were studied, and highly enhanced Ni/Co-MOF nanosheets was obtained from a nitrate precursor and named as MN. Compared with the Ni/Co-MOF nanosheets obtained from a chloride precursor under the same concentration (labeled as MC), the nitrate developed MN exhibited a much thinner and crossarranged nanosheets' structure, which contained a higher Ni/Co ratio (MN, 1.82; MC, 1.47). These structural differences led to totally different electrochemical behaviors. At 1 A/g, the MN thinner nanosheets showed a superior specific capacitance of 2860 F/g, which remained above 90% after 2000 cycles. On the contrary, the MC thicker nanosheets had a maximum specific capacitance of 1350 F/g at 1 A/g, and it decreased to around 47% after 500 cycles. With an energy density of 88.84 Wh/kg and a power density of 750.89 W/kg, the MN thinner nanosheets also performed well in asymmetric solid-state supercapacitors.

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“…Dealloying was also used for preparing a flexible Co(OH) 2 /NiO x H y @Ni hybrid [101] with interwoven Co(OH) 2 nanopetals electrochemically deposited on the skeleton surface of np-NiO x H y electrodes. This was achieved by electrodeposition, using a three electrode cell immersed in a Co(NO 3 ) 2 •6H 2 O aqueous solution, where np-NiO x H y @Ni substrate acts as working electrode, a platinum plate is used as counter electrode and Ag/AgCl as reference electrode.…”

Section: Nio-plastisol Electrodesmentioning

confidence: 99%

NiO-Based Electronic Flexible Devices

Carbone

2022

Applied Sciences

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Personal, portable, and wearable electronics have become items of extensive use in daily life. Their fabrication requires flexible electronic components with high storage capability or with continuous power supplies (such as solar cells). In addition, formerly rigid tools such as electrochromic windows find new utilizations if they are fabricated with flexible characteristics. Flexibility and performances are determined by the material composition and fabrication procedures. In this regard, low-cost, easy-to-handle materials and processes are an asset in the overall production processes and items fruition. In the present mini-review, the most recent approaches are described in the production of flexible electronic devices based on NiO as low-cost material enhancing the overall performances. In particular, flexible NiO-based all-solid-state supercapacitors, electrodes electrochromic devices, temperature devices, and ReRAM are discussed, thus showing the potential of NiO as material for future developments in opto-electronic devices.

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Flexible Co(OH)2/NiOxHy@Ni hybrid electrodes for high energy density supercapacitors

Cited by 64 publications

References 65 publications

In Situ Growth of 3D Lamellar Mn(OH)₂ on CuO-Coated Carbon Cloth for Flexible Asymmetric Supercapacitors with a High Working Voltage of 2.4 V

In Situ Growth of 3D Lamellar Mn(OH)₂ on CuO-Coated Carbon Cloth for Flexible Asymmetric Supercapacitors with a High Working Voltage of 2.4 V

Nitrate Precursor Driven High Performance Ni/Co-MOF Nanosheets for Supercapacitors

NiO-Based Electronic Flexible Devices

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Flexible Co(OH)2/NiOxHy@Ni hybrid electrodes for high energy density supercapacitors

Cited by 64 publications

References 65 publications

In Situ Growth of 3D Lamellar Mn(OH)2 on CuO-Coated Carbon Cloth for Flexible Asymmetric Supercapacitors with a High Working Voltage of 2.4 V

In Situ Growth of 3D Lamellar Mn(OH)2 on CuO-Coated Carbon Cloth for Flexible Asymmetric Supercapacitors with a High Working Voltage of 2.4 V

Nitrate Precursor Driven High Performance Ni/Co-MOF Nanosheets for Supercapacitors

NiO-Based Electronic Flexible Devices

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Product

Resources

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In Situ Growth of 3D Lamellar Mn(OH)₂ on CuO-Coated Carbon Cloth for Flexible Asymmetric Supercapacitors with a High Working Voltage of 2.4 V

In Situ Growth of 3D Lamellar Mn(OH)₂ on CuO-Coated Carbon Cloth for Flexible Asymmetric Supercapacitors with a High Working Voltage of 2.4 V