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Article
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Summary: The controllable adjustment of layered double hydroxide layer spacing has enabled its use as an electrode material for energy storage and electrochemical hydrogen evolution. However, lower conductivity and agglomeration have limited its large-scale application. In this study, sodium dodecyl sulfate (SDS) intercalation modification was used to construct LDH derivatives with vertically grown CoNi-SDS-LDH nanosheets on a nickel foam surface, resulting in a layered structure supported by nanowires which improved ion transport efficiency and reduced agglomeration. The electrode material demonstrated good electrochemical performance, with a cycling stability of 91% after 10,000 cycles and 98.1% performance retention after 10 hours of hydrogen evolution test. This anionic modification offers the potential for large-scale applications of LDH in flexible supercapacitors and electrocatalytic hydrogen evolution.
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V. Madhav Kumar et al.
Summary: A method for fabricating binder-free supercapacitor electrodes of NiO petals templated by vertical graphene nanosheets (VGN) was reported in this study. The morphology, microstructure, and stoichiometry of the NiO petals were greatly influenced by the background O2 pressure and deposition temperature. The VGN templated growth facilitated NiO with high surface area, resulting in a approximately 2.5 times higher areal capacitance compared to NiO directly grown on carbon paper substrate without VGN.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
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Atika et al.
Summary: Nanoscale layered Ni(OH)2 batches were synthesized via a simple thermal decomposition method, without using precipitating or hydrolyzing agents. By controlling the types of solvent and intercalating agent, the morphology and specific capacity of Ni(OH)2 can be tuned. A quasi-solid-state symmetric supercapacitor device was constructed to achieve higher energy density.
JOURNAL OF ALLOYS AND COMPOUNDS
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Hongbo Li et al.
Summary: Ni-Co binary hydroxide with nanostructure was prepared by electrochemical deposition, showing remarkable electrochemical performance, especially excellent rate capability and cycling stability of Ni0.5Co0.5(OH)(2).
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Xuan Wei et al.
Summary: In this study, a novel strategy was developed to fabricate carbon nanotubes-incorporated oxygen vacancy NixCo1-xO nanocages for high-performance supercapacitors. The resulting composite showed high capacitance, excellent energy density, and good cycling stability.
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Summary: This study presents a dual-strategy to enhance the performance of cellulose-derived carbon electrodes by combining free-standing nitrogen-doped carbon nano-wire array coating and pore engineering. The designed electrodes possess high specific capacitance and stable performance, making it a promising breakthrough in the field of biomass-based electrodes for supercapacitors.
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Summary: Compared to traditional transition metal layered double hydroxides, transition metal layered carbonate double hydroxides (TMC-LDHs) have superior electrochemical performance and show great potential for practical application in advanced solid-state supercapacitors. This study successfully synthesized a flower-like TMC-LDH material with high specific capacity and excellent cycle stability using a hydrothermal method. The assembled solid-state hybrid supercapacitor device based on this material delivers high specific energy and retains a significant portion of its initial specific capacity after a large number of cycles.
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Xiao-Lu Wang et al.
Summary: In this work, controllable morphology Co/Ni Basic Carbonate Composites (CNBCC) were synthesized and exhibited remarkable electrochemical performance and cycling stability. Furthermore, a solid-state asymmetric supercapacitor with high energy density, good flexibility, and reliable charge-discharge performance was constructed.
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Thi Toan Nguyen et al.
Summary: Binary cobalt-manganese fluoride hydroxide CoMn(OH)F was successfully assembled with the assistance of ammonium fluoride and hexamethylenetetramine, demonstrating high specific capacitance and cyclic stability in a three-electrode system, as well as remarkable capacitive performance and cycling stability in a two-electrode system when paired with activated carbon. These results highlight the considerable potential of CoMn(OH)F for supercapacitor applications.
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Summary: In this study, a novel electrochromic MOFs-based hierarchical nanosheets (EV-HNSs) were successfully synthesized and used as negative electrodes for supercapacitors. The EV-HNSs showed high capacity, excellent cycling stability, and potential-correlated electrochromic feature. The EV-HNSs//MnO2 ASCs achieved satisfactory operating voltage and high energy density, outperforming most reported ASCs devices. This work provides insights into developing multifunctional negative electrodes based on hierarchical MOFs nanosheets.
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Liu Wan et al.
Summary: Transitional metal phosphide-based heterojunctions were constructed by fabricating heterostructured NiAlP@cobalt substituted nickel carbonate hydroxide (Co-NiCH) nanosheet arrays. The resulting NiAlP@Co-NiCH electrode exhibited a large specific capacity, excellent rate capability, and long lifespan. Additionally, an aqueous asymmetric supercapacitor device constructed with NiAlP@Co-NiCH showed high energy density and cycle stability.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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Summary: Transition metal oxide-based magnetic nanocomposites have unique properties and applications in the field of energy storage. In this study, CuFe2O4 and CuFe2O4 incorporated with reduced graphene oxide were synthesized as potential electrode materials for hybrid supercapacitors. The electrochemical performance of these materials was investigated and compared. The results showed that CuFe2O4 incorporated with reduced graphene oxide exhibited higher specific capacity and cycling stability compared to CuFe2O4 alone.
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Huijie Zhou et al.
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Caiwang Mao et al.
Summary: The realization of carbon peak and carbon neutralization depends on the efficient utilization of renewable energy sources. Aqueous zinc-ion batteries (AZIBs) have received extensive attention due to their material abundance, high capacity, safety, and environmental friendliness. However, the irreversible issues of Zn anode significantly hinder the commercialization of high-performance AZIBs. Carbon materials provide solutions for improving the comprehensive performance of Zn anodes. This review presents the fundamentals, issues, and research progress of Zn anodes with functional carbon materials. Various strategies, including using carbon materials as substrates, protective coating layers, and electrolyte additives, are discussed. The remaining challenges and future perspectives of carbon materials in high-performance AZIBs are outlined.
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Niraj Kumar et al.
Summary: This paper discusses the development and applications of supercapacitors in recent years, as well as the advantages and limitations of materials used as electrodes. It reviews three types of supercapacitors - electrochemical double-layer capacitors, pseudocapacitors, and hybrid supercapacitors - and provides an overview of the latest research progress in material preparation and modification. Feasible solutions to the problems encountered in the development of supercapacitors are proposed, and the future development direction of supercapacitors is also discussed.
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Yifei Geng et al.
Summary: Aqueous Zn ion batteries (AZIBs) are a promising electrochemical energy storage device. Additive engineering is an innovative and flexible technology that effectively solves the challenges faced by AZIBs cathode and anode. This review summarizes the effects of additive engineering on cathode and anode, as well as the influence on charge storage mechanism and kinetic characteristics of AZIBs.
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Bing Yan et al.
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DIAMOND AND RELATED MATERIALS
(2022)
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Chemistry, Inorganic & Nuclear
Bing Yan et al.
Summary: In this study, the researchers designed a thick carbon electrode to improve the performance of electrical double-layer supercapacitors under harsh conditions. By utilizing an ultrahigh mass loading from carbonization and activation of basswood, the supercapacitor was able to operate at fast charge/discharge rates, ultralong cycle life, and ultralow temperature. The carbon electrodes inherited the vertical channels of basswood, enhanced ion penetration and mass transport, and possessed rational micro/meso-sized pores and oxygen-containing functional groups induced by H2O2 activation. As a result, the supercapacitor achieved appreciable capacitive performance even with an ultrahigh mass loading and at ultralow temperatures.
INORGANIC CHEMISTRY FRONTIERS
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Environmental Sciences
Bing Yan et al.
Summary: Developing commercial-level high active mass-loading electrodes is crucial for the practical application of supercapacitors. This study presents a self-standing biochar electrode with high active mass-loading, which exhibits excellent capacitive performance due to its conductive carbon skeleton, abundant N/O dopant, and 3D porous structure. The electrode shows promising potential for practical application, as demonstrated by its ability to power various electronic devices.
Review
Chemistry, Multidisciplinary
Qian Zhang et al.
Summary: Porous carbon nanomaterials (PCNs) are widely used in energy storage devices. Traditional synthesis methods of PCNs are time-consuming, tedious, corrosive, and costly. Organic potassium salts (OPSs) have emerged as versatile reagents for synthesizing PCNs, which can avoid the use of large amounts of corrosive chemical agents. OPS-based synthesis of PCNs utilizes in-situ generated potassium carbonate as a green activation agent and water-removable template, resulting in highly porous architecture. The carbon-rich organic moiety in OPSs acts as a carbon precursor and chemical blowing agent. This review summarizes recent progress on the capacitive performance of PCNs synthesized from OPSs, providing constructive viewpoints for cost-effective and green synthesis of PCNs for supercapacitor applications.
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Ang Li et al.
Summary: Rational construction of heterostructures can compensate for the property shortfalls of a single component. This article reports a unique CuCo carbonate hydroxide nanowires@FeCo-layered double hydroxide hexagonal nanosheets material and demonstrates its superior electrochemical performance.
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S. Nandhini et al.
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ELECTROCHIMICA ACTA
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Shang Wu et al.
Summary: The tubular-like NiS/Mo2S3 microspheres designed and synthesized by solvothermal method enhance the specific energy and cycle life of asymmetric supercapacitors, contributing to the development of material systems related to nickel-molybdenum bimetal for SCs.
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Chenxu Miao et al.
Summary: A binder-free ultrathin alpha-MnSe nanosheets electrode was prepared and exhibited high capacity, good rate capability, and long-term durability. Moreover, an asymmetric supercapacitor fabricated by alpha-MnSe anode and active carbon cathode showed high energy density and satisfying cycle performance.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
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Qiang Hu et al.
Summary: In this study, porous Ni/Co hydroxide nanosheets were synthesized using an electrochemical anion-exchanged method, with the application of an electric field in alkaline solution to accelerate nucleation and improve charge and discharge performance. The optimized material showed a high specific capacitance and energy density, along with improved power density and cyclic stability, demonstrating the potential for use in low-cost, high-performance supercapacitors.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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Jiangyu Hao et al.
Summary: Metal metaphosphates, especially those with a core-shell structure, have shown great potential in energy storage applications. The core-shell structured Ni(OH)(2)/Ni(PO3)(2) (NNP) hybrid electrode exhibited superior specific capacitance and excellent stability in supercapacitor application. The porous nanoflake and hierarchical core-shell structure of NNP hybrid composite contribute to the outstanding electrochemical performance.
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Guanhua Zhang et al.
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