Showing papers on "Capacitance published in 2022"
114 citations
TL;DR: In this paper , the most recent improvements in vastly used electrode materials, with significant capacity as well as long cyclic life for high-performance supercapattery devices, are discussed.
Abstract: Supercapattery devices have grasped attention due to their remarkable specific energy (Es) without affecting their specific power (Ps), which is significantly higher compared to batteries and supercapacitors (SCs). In contrast to the traditional electric double layer capacitors (EDLCs) and pseudocapacitors (PCs), supercapattery devices have shown larger specific capacitance. Metal oxides, sulfides, phosphates, and metal-organic frameworks (MOFs) based materials have been extensively utilized for the advancement of hybrid energy storage devices (HESDs). Currently the challenges faced by this technology, is to improve the energy density without compromising the power density. The advantage of two merged technologies (battery and supercapacitor (SC)) into a single system, delivered tremendous power from capacitive components while high specific energy from battery grade material (BGM). This review covers the most recent improvements in vastly used electrode materials, with significant capacity as well as long cyclic life for high-performance supercapattery devices. Furthermore, this study aims to elaborate the electrochemical performance of the metal oxides, sulfides, phosphates, and MOFs for energy storage applications.
92 citations
TL;DR: In this paper , the influence of polymer film thickness on the dielectric properties, film quality issues in thinner polymer films with different filler contents, and major processing methods in decreasing polymeric film thickness are discussed.
91 citations
TL;DR: In this paper, the influence of polymer film thickness on the dielectric properties, film quality issues in thinner polymer films with different filler contents, and major processing methods in decreasing polymeric film thickness are discussed.
91 citations
TL;DR: In this paper, a flexible and conductive PEDOTPSS/CNF nanopaper (PEDOT:PSS,/CNP) was used for supercapacitors.
90 citations
TL;DR: In this article , the main challenges facing in recent years and the most significant results obtained from the integration of photovoltaic cells, supercapacitors and batteries are discussed, as well as the designs of integration, the impact of nanostructured materials, the possibility of developing electrodes shared between several parts of the devices and the possibility to achieving important objectives in the field of portable electronics.
86 citations
TL;DR: In this article, the authors developed a facile synchronization strategy to prepare a N-doped and oxygen vacancy-rich NiCo2O4 microporous nanograss (N-Ov-NCO MiNG), with adjustable superficial nanoporous architecture and electronic structure.
83 citations
81 citations
TL;DR: An eco-friendly, new, and controllable approach for the preparation of manganese oxide (α-MnO2) nanorods has been introduced using hydrothermal reaction for supercapacitor application as mentioned in this paper.
80 citations
TL;DR: Li et al. as discussed by the authors exploited hierarchical nanohybrids via ionic hetero-assembly of 3D FeNi-LDH arrays on 2D Ti3C2Tx-based MXene nanosheets through mutual coupling synergy.
80 citations
TL;DR: Li et al. as discussed by the authors exploited hierarchical nanohybrids via ionic hetero-assembly of 3D FeNi-LDH arrays on 2D Ti3C2Tx-based MXene nanosheets through mutual coupling synergy.
TL;DR: In this paper , a flexible and conductive PEDOTPSS/CNF nanopaper (PEDOT:PSS, CNP) was used for supercapacitors.
TL;DR: In this article, 1D carbon nanotube (CNT) was introduced to construct a highly conductive net structure, tightly anchoring PC on MXene flakes, thus ensuring fast electron delivery by increasing the contact area between MXene and PC.
TL;DR: In this paper, metal-organic frameworks (MOFs) derived hollow rod-like NiCoMn ternary metal sulfides nanosheets are successfully synthesized by the etching/ion exchange reaction and additional sulfurization.
TL;DR: In this paper , the authors developed a facile synchronization strategy to prepare a N-doped and oxygen vacancy-rich NiCo 2 O 4 microporous nanograss (N-Ov-NCO MiNG), with adjustable superficial nanoporous architecture and electronic structure.
TL;DR: In this article , a review delves into theoretical methods to describe the equilibrium and dynamic responses of the electric double layer (EDL) structure and capacitance for electrochemical systems commonly deployed for capacitive energy storage.
Abstract: Significant progress has been made in recent years in theoretical modeling of the electric double layer (EDL), a key concept in electrochemistry important for energy storage, electrocatalysis, and multitudes of other technological applications. However, major challenges remain in understanding the microscopic details of the electrochemical interface and charging mechanisms under realistic conditions. This review delves into theoretical methods to describe the equilibrium and dynamic responses of the EDL structure and capacitance for electrochemical systems commonly deployed for capacitive energy storage. Special emphasis is given to recent advances that intend to capture the nonclassical EDL behavior such as oscillatory ion distributions, polarization of nonmetallic electrodes, charge transfer, and various forms of phase transitions in the micropores of electrodes interfacing with an organic electrolyte or ionic liquid. This comprehensive analysis highlights theoretical insights into predictable relationships between materials characteristics and electrochemical performance and offers a perspective on opportunities for further development toward rational design and optimization of electrochemical systems.
TL;DR: An eco-friendly, new, and controllable approach for the preparation of manganese oxide (α-MnO2) nanorods has been introduced using hydrothermal reaction for supercapacitor application as mentioned in this paper .
TL;DR: In this paper , metal-organic frameworks (MOFs) derived hollow rod-like NiCoMn ternary metal sulfides nanosheets are successfully synthesized by the etching/ion exchange reaction and additional sulfurization.
TL;DR: In this article , 1D carbon nanotube (CNT) was introduced to construct a highly conductive net structure, tightly anchoring PC on MXene flakes, thus ensuring fast electron delivery by increasing the contact area between MXene and PC.
TL;DR: In this article , a flexible asymmetric supercapacitor device is designed and fabricated by combining MXene/carbon fabric (CF) as the negative electrode and CF/MnO2 as the positive electrode in neutral electrolyte.
Abstract: As a newly emerging 2D materials, MXene as electrode materials can be widely used in supercapacitors. However, symmetric supercapacitors based on MXene have a narrow voltage window due to oxidation occurs at a high anode potential. In this study, flexible asymmetric supercapacitor device is designed and fabricated by combining MXene/carbon fabric (CF) as the negative electrode and CF/MnO2 as the positive electrode in neutral electrolyte. The voltage window of the asymmetric device is successfully increased to 1.5 V, which is more than twice wider than that of the symmetric device. The maximum specific capacitance is 20.5 F g−1 at 1.5 A g−1. The specific capacitance remains at 84% after 3000 charge-discharge cycles at 1.5 A g−1. Furthermore, two asymmetric devices after bending 1000 times greater than 90° connected in series can easily power a 3 V LED for 90 min. The energy density of the asymmetric device is 6.4 W h kg−1 at 1107.7 W kg−1 power density. The work presented here shows that the asymmetric device based on MXene//MnO2 have excellent application prospects for the next generation of electrochemical energy storage devices.
TL;DR: In this article, the authors developed a simple, effective and innovative strategy, namely, introducing both polymerized polypyrrole (PPy) particles and ionic liquid (ILs)-based microemulsion particles as "dual spacers" to fabricate functionalized Ti3C2-MXene composite films for highperformance and wide-temperature application in supercapacitors.
TL;DR: Li et al. as mentioned in this paper proposed a zinc-ion hybrid micro-supercapacitor (ZIHMSC) by designing a Ti3C2Tx MXene based electrode as capacitor-type anode and vanadium pentoxide (V2O5)-based electrode as battery-type cathode.
TL;DR: In this article, a novel core/sell architecture was successfully designed from aluminum-doped cobalt sulfide encapsulated by nitrogen-decomposed graphene, which achieved a supreme specific capacity of about 736 C/g at an applied current density of 1 A/g, ultra-long cycle stability of 92% after performing 10,000 cycles, and remarkable retention rate (∼71%).
TL;DR: In this paper , a chitosan-based porous carbon microsphere (CPCM) was used to construct a sandwich-like structure for supercapacitors.
Abstract: The application of porous carbon microspheres derived from pure biomass in supercapacitors is restricted due to their limited reactive groups. MXene owns a combination of redox Faradic surface with good metallic conductivity and hydrophilicity, which assists to obtain high pseudocapacitance and energy density. Herein, Ti3C2Tx MXene was introduced to chitosan-based porous carbon microsphere (CPCM) to fabricated sandwich-like structure (CPCM/MXene) through electrostatic interaction. The Ti3C2Tx protected the spherical structure of CPCM. Meanwhile, CPCM hindered the reaggregation of Ti3C2Tx by inserting in the Ti3C2Tx layers, promoting the electrolyte migration kinetics. The synergistic effect endowed CPCM/MXene high specific capacitance of 362 F/g at current density of 0.5 A/g and acceptable cycling stability with 93.87% capacitance retention at a high current density of 10 A/g after 10,000 cycles. Furthermore, CPCM/MXene displayed a high energy density of 27.8 W/(h•kg) at 500.0 W/kg of power density. These satisfactory performances prove that combining Ti3C2Tx MXene nanosheets with porous carbon microspheres is a considering method to construct a new generation electrode material of supercapacitor.
TL;DR: In this paper, a well-design structure MOF derived ZnO/C@(Ni,Co)Se2 core-shell nanostructure on carbon cloth was prepared for the first time.
TL;DR: In this article , NiCo-LDH hollow spheres are assembled with frizzy NiCoLDH nanosheets, where the hollow structure can inhibit agglomeration of the LDH nano-heets to expose more active sites and shorten the diffusion path of electrolyte ions.
TL;DR: In this article, the NiCo-LDH hollow spheres are assembled with frizzy NiCo -LDH nanosheets, where the hollow structure can inhibit agglomeration of the LDH nano-heets to expose more active sites and shorten the diffusion path of electrolyte ions.
TL;DR: In this article , a novel core/sell architecture was successfully designed from aluminum-doped cobalt sulfide encapsulated by nitrogen-decomposed graphene, which achieved a supreme specific capacity of about 736 C/g at an applied current density of 1 A/g, ultra-long cycle stability of 92% after performing 10,000 cycles, and remarkable retention rate (∼71%).
TL;DR: In this article, two 3D 3d-4f bimetal organic frameworks (ZnCe-MOF and CuCe -MOF) were created through hydrothermal method.