Integrated System of Solar Cells with Hierarchical NiCo2O4 Battery-Supercapacitor Hybrid Devices for Self-Driving Light-Emitting Diodes

Yuan, Yuliang; Lu, Yuexiang; Jia, Bei‐Er; Tang, Haichao; Chen, Lingxiang; Zeng, Yu‐Jia; Hou, Yang; Zhang, Qinghua; He, Qinggang; Lei, Jiao; Leng, Jianxing; Ye, Zhizhen; Lü, Jianguo

doi:10.1007/s40820-019-0274-0

Cited by 71 publications

(33 citation statements)

References 57 publications

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“…In general, a practical supercapacitor device tends to self-discharge over time due to thermodynamic effects which include ohmic leakage, side reactions, and overcharging. It was reported that a NiCo 2 O 4 hybrid supercapacitor device exhibited low self-discharge which had a very little voltage drop from 1.6 to 1.594 V after 5 s and unchanged voltage over 24 h. 31 This suggests that the NCO/NCS/NF electrode will also provide such a low selfdischarge property when integrated to a hybrid system. 1.…”

Section: Resultsmentioning

confidence: 98%

Hierarchical Architectured Dahlia Flower-Like NiCo₂O₄/NiCoSe₂ as a Bifunctional Electrode for High-Energy Supercapacitor and Methanol Fuel Cell Application

Gopalakrishnan

Badhulika

2021

Energy Fuels

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We report unique hierarchical dahlia flower-like NiCo 2 O 4 nanograss/NiCoSe 2 nanosheets on Ni foam (NCO/NCS/NF) as bifunctional binder-free electrodes for high energy density hybrid supercapacitors and methanol electro-oxidation applications. NCO/ NCS/NF is synthesized by a facile hydrothermal method followed by an electrodeposition process. As a supercapacitor electrode, NCO/NCS/NF exhibits a superior specific capacitance of 2045.5 F g −1 (227 mAh g −1 or 818 C g −1 ) at 1.8 A g −1 . The assembly of a hybrid NCO/ NCS/NF//AC device delivers impressive specific energy of 54.5 Wh kg −1 at 350 W kg −1 with durable cyclic stability of 82.5% after 10,000 charge−discharge cycles. NCO/NCS/NF as an electrocatalyst toward methanol oxidation yields a high current density of 130 mA cm −2 at 0.5 V and a low onset potential of 0.13 V, in comparison to other reported catalysts. Such high electrochemical performance of a binder-free NCO/NCS/NF electrode is attributed to the synergistic effect between the bimetallic oxides and selenides, core−shell nanostructure, hierarchically aligned architectures of nanograss/nanosheets, and conductive coatings of NCS to provide rapid charge transfer reactions. To the best of author's knowledge, this is the first report of a 3D hierarchical NCO/NCS/NF 1D/2D nanostructure toward a bifunctional binder-free electrode for energy storage and conversion technologies.

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Section: Resultsmentioning

confidence: 98%

Hierarchical Architectured Dahlia Flower-Like NiCo₂O₄/NiCoSe₂ as a Bifunctional Electrode for High-Energy Supercapacitor and Methanol Fuel Cell Application

Gopalakrishnan

Badhulika

2021

Energy Fuels

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“…In general, the energy density of HSCs mainly depends on the electrochemical performances of battery-type electrodes. Thus, considerable efforts have been channeled into designing and exploiting the high-performance electrode materials, especially in the transition metal compounds [17][18][19]. Emerging as a new category of crystalline porous materials with ultrahigh porosity and abundant metal active sites, metal-organic frameworks (MOFs) are assembled by the coordination bond between metal ions and organic ligands, giving the enormous application prospects [20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Ultrathin 2D Metal–Organic Framework Nanosheets In situ Interpenetrated by Functional CNTs for Hybrid Energy Storage Device

Ran¹,

Xu²,

Pan

et al. 2020

Nano-Micro Lett.

128

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HIGHLIGHTS • The ultrathin nickel metal-organic framework (MOF) nanosheets in situ interpenetrated by functional carboxylated carbon nanotubes (C-CNTs) were successfully constructed. The incorporated C-CNTs effectively adjust the layer thickness of Ni-MOF nanosheets. • The integrated hybrid MOF nanosheets delivered the boosted electrochemical performances and exhibited superior specific capacity of 680 C g −1 at 1 A g −1 .

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“…Previously, batteries were used to integrate PV cells, but due to some inadequacies, such as slow charge/discharge capability and short life cycles, supercapacitors are preferred for integration with PV cells. This is attributed to its rapid charging/discharging ability since, first, there is no chemical reaction required, and second, the energy density is reported to be about ten times higher than batteries with the same weight [4,5]. Figure 1 depicts a comparison between batteries, capacitors, supercapacitors and other energy storage devices in terms of specific energy, specific power and the charge/discharge time.…”

Section: Introductionmentioning

confidence: 99%

“…Since the concept of PV cell-supercapacitor integration was introduced in the year 2004, it has sparked interest in many researchers to carry out experimental and simulation work on the fabrication of this device and assess its performance. For instance, a study by [5] integrated hydrogenated amorphous silicon (a-Si/H) solar cells, NiCo 2 O 4 battery supercapacitor hybrids (BSHs) and f light emission diodes (LEDs) into one system. The whole system could work independently with an overall efficiency of 8.1% and the storage efficiency reached 74.24%.…”

Section: Introductionmentioning

confidence: 99%

Integrating Photovoltaic (PV) Solar Cells and Supercapacitors for Sustainable Energy Devices: A Review

et al. 2021

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Hybrid systems have gained significant attention among researchers and scientists worldwide due to their ability to integrate solar cells and supercapacitors. Subsequently, this has led to rising demands for green energy, miniaturization and mini-electronic wearable devices. These hybrid devices will lead to sustainable energy becoming viable and fossil-fuel-based sources of energy gradually being replaced. A solar photovoltaic (SPV) system is an electronic device that mainly functions to convert photon energy to electrical energy using a solar power source. It has been widely used in developed countries given that they have advanced photovoltaic (PV) technology that reduces dependence on fossil fuels for energy generation. Furthermore, a supercapacitor is an alternative solution for replacing heavy batteries and it is a system with a prominent high power density and a long life cycle. Its unique properties of high capacitance with low voltage limits lead to this highly in-demand material being incorporated into goods and services that are produced by the electrical and electronics industries. It is another option for grid-based power or large batteries. Since supercapacitors have the ability to store huge amounts of energy, they allow for a novel system that integrates supercapacitors with solar cells in which energy generation and energy storage are combined into one system. This paper explores the common materials that are used for solar cells and supercapacitors, the working mechanisms, the effectiveness of the integrated device and the technical challenges that are encountered when refining this device. Hence, this review serves as a guide for choosing the right materials and methods in order to produce an integrated PV solar cell–energy storage device for various applications.

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Integrated System of Solar Cells with Hierarchical NiCo2O4 Battery-Supercapacitor Hybrid Devices for Self-Driving Light-Emitting Diodes

Cited by 71 publications

References 57 publications

Hierarchical Architectured Dahlia Flower-Like NiCo₂O₄/NiCoSe₂ as a Bifunctional Electrode for High-Energy Supercapacitor and Methanol Fuel Cell Application

Hierarchical Architectured Dahlia Flower-Like NiCo₂O₄/NiCoSe₂ as a Bifunctional Electrode for High-Energy Supercapacitor and Methanol Fuel Cell Application

Ultrathin 2D Metal–Organic Framework Nanosheets In situ Interpenetrated by Functional CNTs for Hybrid Energy Storage Device

Integrating Photovoltaic (PV) Solar Cells and Supercapacitors for Sustainable Energy Devices: A Review

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Integrated System of Solar Cells with Hierarchical NiCo2O4 Battery-Supercapacitor Hybrid Devices for Self-Driving Light-Emitting Diodes

Cited by 71 publications

References 57 publications

Hierarchical Architectured Dahlia Flower-Like NiCo2O4/NiCoSe2 as a Bifunctional Electrode for High-Energy Supercapacitor and Methanol Fuel Cell Application

Hierarchical Architectured Dahlia Flower-Like NiCo2O4/NiCoSe2 as a Bifunctional Electrode for High-Energy Supercapacitor and Methanol Fuel Cell Application

Ultrathin 2D Metal–Organic Framework Nanosheets In situ Interpenetrated by Functional CNTs for Hybrid Energy Storage Device

Integrating Photovoltaic (PV) Solar Cells and Supercapacitors for Sustainable Energy Devices: A Review

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Hierarchical Architectured Dahlia Flower-Like NiCo₂O₄/NiCoSe₂ as a Bifunctional Electrode for High-Energy Supercapacitor and Methanol Fuel Cell Application

Hierarchical Architectured Dahlia Flower-Like NiCo₂O₄/NiCoSe₂ as a Bifunctional Electrode for High-Energy Supercapacitor and Methanol Fuel Cell Application