Mixing solvothermal synthesis nickel selenide on the surface of graphene for high-efficiency asymmetric supercapacitors

Wu, Shang; Cui, Tao; Hu, Qinzheng; Yin, Fenping; Feng, Qiaoliang; Zhou, Sheng Gang; Su, Qiong; Wu, Lan; Yang, Quanlu

doi:10.1016/j.synthmet.2020.116490

Cited by 34 publications

(9 citation statements)

References 48 publications

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“…6 Co 0 . 4 Se 2 (42.1 Wh kg −1 at 716 W kg −1 ), [ 41 ] Ni 3 Se 2 NSs@CF (32.8 Wh kg −1 at 677.03 W kg −1 ), [ 42 ] NiSe/rGO (50.1 Wh kg −1 at 816 W kg −1 ), [ 7 ] NiSe 2 /rGO (33.13 Wh kg −1 at 850 W kg −1 ), [ 43 ] and NiSe‐Ni 0 . 85 Se (38 Wh kg −1 at 939 W kg −1) .…”

Section: Resultsmentioning

confidence: 99%

Interface Engineering of Nickel Selenide and Graphene Nanocomposite for Hybrid Supercapacitor

Khaladkar

Gund²,

Maurya

et al. 2023

Adv Energy and Sustain Res

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The progressive lifestyle and technologically driven economic growth have considerably increased the energy demand across the globe. This has stressed the existing energy resources and adversely affected the environment. To address increased energy demands, it is indispensable to go for a clean carbon-neutral energy source and highly efficient energy storage solutions. Among the different energy storage systems, supercapacitors (SCs) are promising due to their ultrahigh power densities, higher coulombic efficiencies, stable cycling performances, cost-effectiveness, and environment-friendliness. [1][2][3][4] However, their lower energy densities compared to other electrochemical energy technologies like batteries and fuel cells, limit their further applications. Different strategies have been employed for improving the electrochemical properties of SC and an encouraging outlook is to assemble hybrid supercapacitors (HSCs). It consists of two distinct electrodes working via Faradaic, pseudocapacitive, and electric double-layer capacitive (EDLC) charge storage mechanisms. The electrochemistry of two electrode materials in one SC device offers a synergy of high energy storage capacity (Faradaic materials, also known as batterytype materials) and high rate (non-Faradaic materials). However, due to a significant mismatch in the charge dynamics between non-Faradaic and battery-type electrodes, these devices frequently fail to achieve their expected performance. To solve this issue, a double hybridization perspective is envisaged wherein one electrode is EDLC type while the other should be EDLC/battery-type or pseudocapacitor hybrid electrode. [2,5,6] The choice of electrode material thus becomes critical for high-performing energy storage devices. The other factors that are crucial in electrochemical properties are structure, morphology, and composition. Nanostructurization of such electrode materials leads to atomic/molecular level interaction, decreased diffusion pathways, stability in phase changes, etc., and offers improved electrochemical activity. Transition metal selenides have recently attracted much attention over sulfides due to their high electrical conductivity, interesting chemical behavior, and formation of variety of stable selenides such as nickel selenides (NiSe) in terms of stoichiometric and nonstoichiometric compounds. [1] The small difference in electronegativity between Ni (1.9 eV) and Se (2.4 eV), valence electronic configuration of Ni

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Section: Resultsmentioning

confidence: 99%

Interface Engineering of Nickel Selenide and Graphene Nanocomposite for Hybrid Supercapacitor

Khaladkar

Gund²,

Maurya

et al. 2023

Adv Energy and Sustain Res

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“…The synthesized materials’ physical and chemical natures are dependent on their solvent properties, with the supercritical phase allowing particle formation due to the fast reaction kinetics. When water is replaced by another solvent, the same process becomes solvothermal [ 51 ]. Although pristine TiN offers excellent electrical conductivity and rapid charge–discharge rates, the poor cyclability and inferior capacitance are the major drawbacks [ 32 ].…”

Section: Synthesis Techniques For Nanostructured Titanium Nitridementioning

confidence: 99%

Nanostructured Titanium Nitride and Its Composites as High-Performance Supercapacitor Electrode Material

Parveen

Ansari

et al. 2022

Nanomaterials

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Electrochemical supercapacitors as an energy storage device have become trademark in current electronic, medical and industrial applications, as they are sources of impressive power output. Supercapacitors supply fast power output, suitable to cover the energy demand of future electronic devices. Electrode material design is a subject of intense research in the area of energy development and advancement, due to its essential role in the electrochemical process of charge storage and the cost of capacitors. The nano-dimensions allow for more electroactive sites, different pore size distributions, and a large specific surface area, making nanostructured electrode materials more promising. Electrode materials based on metal oxides, metal nitrides, and metal carbides are considered ideal for highly efficient electrochemical supercapacitors. Recently, much effort has been devoted to metal nitride-based electrodes and their diverse compositions as they possess higher electrical conductivity and better corrosion resistance, electrochemical stability, and chemical reactivity. Among these, titanium nitride (TiN), possesses high electrochemical stability, outstanding electrical conductivity, and a unique electronic structure. Nanocomposites based on titanium nitrides are known to deliver higher electrochemical performance than pristine nanostructured TiNs due to potential synergetic effects from both the materials. In this paper, recent advancements made in the field of nanostructural TiN electrode materials for SCs are reviewed along with their challenges and future opportunities. Additionally, some of the major techniques involved in the synthesis process are discussed, along with some basic concepts.

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“…Moreover, it is difficult to improve the purity due to residual chemical substances in the particles. In addition, it has the disadvantage of low crystallinity, since it is synthesized at low a temperature [7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Conductive Powder Synthesis Technology for Improving Electrical Conductivity by One-Pot Ultrasonic Spray Pyrolysis Process

Koo¹,

Park²

2023

New Advances in Powder Technology

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In this chapter, we will study the spray pyrolysis process, which is a bottom-up process, and examine the composite electrode powder synthesis process and properties of the core-shell structure. Generally, it is difficult to produce fine particles from metal powders using the top-down method. Thus, the liquid phase method, which is a bottom-up process, is mainly used. However, the liquid phase method has a problem in that impurities exist in the particles. In addition, it is difficult to control the precipitation when synthesizing powder using a solution containing several types of metal salts. The spray pyrolysis process introduced here made it possible to produce composite particles in a one-pot manner without any additional processes for synthesizing the core-shell structure. In the case of core-shell structure of Ag-glass composite powder, the specific resistance of the composite electrode was significantly lowered, compared to the electrode formed by mixing glass frits individually, which improved the dispersibility of the glass. In the case of Cu composite particles with a coating layer, both Ag and glass coating layers formed a passivation layer to improve atmospheric stability, and the introduction of a coating material also improved electrical properties.

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Mixing solvothermal synthesis nickel selenide on the surface of graphene for high-efficiency asymmetric supercapacitors

Cited by 34 publications

References 48 publications

Interface Engineering of Nickel Selenide and Graphene Nanocomposite for Hybrid Supercapacitor

Interface Engineering of Nickel Selenide and Graphene Nanocomposite for Hybrid Supercapacitor

Nanostructured Titanium Nitride and Its Composites as High-Performance Supercapacitor Electrode Material

Conductive Powder Synthesis Technology for Improving Electrical Conductivity by One-Pot Ultrasonic Spray Pyrolysis Process

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