Article
Chemistry, Physical
C. Justin Raj, Ramu Manikandan, Murugesan Rajesh, Periyasamy Sivakumar, Hyun Jung, S. Jerome Das, Byung Chul Kim
Summary: In this study, a supercapacitor utilizing activated carbon from cornhusk and seawater as the electrolyte was designed, with the Ti-based electrode showing the best electrochemical performance and stability. The supercapacitor exhibited high specific capacitance, energy density, and stability in seawater electrolyte.
JOURNAL OF POWER SOURCES
(2021)
Article
Electrochemistry
Ahmed Elsonbaty, A. M. Elshaer, Mohamed Harb, Moataz Soliman, Shaker Ebrahim, Ayman Eltahan
Summary: Nanoflakes of bimetal metal-organic framework (MOF) with different multiwall carbon nanotubes (MWCNTs) contents decorated by layer double hydroxide (LDH) were synthesized as supercapacitor electrodes, exhibiting high specific capacitance, excellent stability, and electrochemical performance. Various characterization techniques were used to study the structure, morphology, and properties of the nanocomposites.
ELECTROCHIMICA ACTA
(2021)
Article
Nanoscience & Nanotechnology
Zongchen Zhao, Lili Zheng, Haoran Li, Zeyin He, Dong Han, Jing Shi, Bin Xu, Huanlei Wang
Summary: A novel electrode of Cu@CuCo2O4@polypyrrole nanoflowers is fabricated to improve the performance of CuCo2O4 electrodes. The in situ grown CuCo2O4@polypyrrole shows a much higher pseudocapacitance compared to pristine CuCo2O4. Furthermore, an asymmetric supercapacitor assembled with CuCo2O4@polypyrrole as cathode and active carbon as anode exhibits excellent performance in terms of energy density and cycling stability.
Article
Chemistry, Physical
Haibin Guo, Jing Ning, Boyu Wang, Xin Feng, Maoyang Xia, Dong Wang, Yanqing Jia, Jincheng Zhang, Yue Hao
Summary: This study demonstrates a sodium-intercalated electrode based on nanoflower 1T-2H MoSe2-graphene, showing ultrahigh electrochemical performance for highly efficient energy storage applications. The insertion of sodium ions into the material increases the probability of ion insertion/extraction reactions, expanding the distance between layers and increasing conductivity. The composite electrode exhibits ultrahigh capacity and power density, achieving enhanced and efficient energy storage.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Ceramics
Yajun Huang, Xiaolong Zhao, Minghao Fan, Song He, Junling Wang
Summary: Research findings show that high dosages of organic flame retardants are often required to achieve favorable flame retardancy in epoxy resin, which causes serious aggregation and compromises mechanical properties. In this study, a nano-microarchitecture of MoS2 nanoflowers on polypyrrole microtubes were used as flame retardants in EP, resulting in significant reductions in heat release rate and toxicants emission. Additionally, the storage modulus of the EP composite was enhanced by 20.9% with the addition of only 1.0 wt% P-Mo.
CERAMICS INTERNATIONAL
(2023)
Article
Nanoscience & Nanotechnology
Farkhod Azimov, Jinseok Lee, Subin Park, Hyun Min Jung
Summary: In order to overcome the energy density limitation of supercapacitors, a high specific capacitance material was achieved by manipulating the nanostructure of FeS2. Nanosheet-assembled FeS2 (NSA-FeS2) was fabricated using a novel method. The as-prepared NSA-FeS2 and NSA-FeS2/polyaniline (PANI) composites showed specific capacitances of 763 and 976 Fg(-1), respectively, at a current density of 0.5 Ag-1. The capacitance retention of the NSA-FeS2/PANI composites was 49% when the current density was increased to 5 Ag-1. The obtained specific capacitances demonstrated the highest values in pure FeS2 and FeS2-based composites.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Materials Science, Multidisciplinary
Elumalai Dhandapani, Navaneethan Duraisamy, Ramesh Rajedran
Summary: This study reports a carbon-quantum-dots-anchored poly(aniline-co-indole) composite thin film fabricated by the hybrid electrospray deposition method. The composite film exhibits outstanding electrochemical performance, with a highest specific capacity of 185.1 C/g and excellent cyclability of 79.4% after 10000 charge-discharge cycles. By using this electrode, a hybrid solid-state supercapacitor (PAPI@CQDs//rGO) with a specific capacity of 84.2 C/g, an ultrahigh energy density of 26.22 Wh/kg, and a power density of 1125 W/kg is achieved. The solid-state supercapacitor also shows outstanding cyclability with a retention of 72.3% after 5000 cycles. This study provides an effective approach for conducting polymer-based composite electrodes in supercapacitors and extends their application in the field of flexible electronics.
ACS APPLIED POLYMER MATERIALS
(2023)
Article
Chemistry, Physical
Yuling Zhuo, Eric Prestat, Ian A. Kinloch, Mark A. Bissett
Summary: Two-dimensional materials such as graphene and MoS2 have potential applications in energy storage, but their performance is limited by restacking and poor electrical conductivity. In this study, a true composite electrode was formed by chemically modifying graphene to self-assemble with MoS2, resulting in an alternating layer structure. This composite electrode exhibited improved energy storage properties and stability.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Chemistry, Physical
Pengfei Li, Min Zhang, Hongfei Yin, Jiacheng Yao, Xiaoheng Liu, Shenming Chen
Summary: Transitional metal phosphides have been extensively studied for their superior electrical conductivity, rich valences, and high electrochemical activity. The hierarchical mesoporous NiCoP hollow nanocubes electrode material shows great potential as a novel battery-type electrode for super-capacitors due to its high specific capacity, ultra-high rate capability, and cycling stability. Additionally, a hybrid super-capacitor assembled with NiCoP and activated carbon achieves high energy density and power density with exceptional cycling stability.
APPLIED SURFACE SCIENCE
(2021)
Article
Energy & Fuels
Sherief A. Al Kiey, A. A. Menazea, A. M. Ismail
Summary: Free-standing PVC/PVDF/Au NPs composite films were synthesized and irradiated with laser for different times. The films were characterized by FTIR, XRD, FESEM, UV, DSC, and TGA, confirming the complexation between PVC/PVDF and Au NPs and the improved optical and thermal properties. The composite films were used as flexible substrates for supercapacitor applications, demonstrating high specific capacitance and improved rate capacitance.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Chemistry, Physical
Zhimin Shen, Juan Du, Yahui Mo, Aibing Chen
Summary: A nitrogen-doped mesoporous carbon layer-modified reduced graphene oxide (rGONC) material was prepared with high energy storage performance, showing excellent reversible capacity, cycling life, and rate capability in potassium ion batteries and supercapacitors.
Article
Engineering, Environmental
Jianying Liang, Shuang Luo, Die Pan, Pengfei Xu, Feng Zhan, Jien Li
Summary: Metal-organic frameworks (MOFs) are excellent electrode materials for supercapacitors due to their high porosity, large surface area, and versatile structures. However, their electrochemical energy storage performance is limited by low electrical conductivity and difficulties in growing uniformly on carbon cloth conductive substrates. This study presents a novel approach to anchor CoNi-MOF nanorods on carbon cloth by growing Ni (OH) (2) nanosheets as precursors and converting them into porous hollow CoNiOOH nanorods. The resulting CoNiOOH-2 electrode exhibits an ultrahigh area specific capacitance of 11.6F/cm (2) at 2 mA/cm (2). In addition, the CoNiOOH-2// NAC ASC device, assembled with nitrogen-doped activated carbon cloth (NAC) as the negative electrode, demonstrates a high energy density of 0.732 mWh/cm (2) at 1.6 mW/cm (2) and excellent cycling stability with 98.59% capacitance retention after 10,000 cycles.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Shi Nee Lou, Melvin Choon Heng See, Sean Lim, Neeraj Sharma, Jason Scott, Da-Wei Wang, Rose Amal, Yun Hau Ng
Summary: A direct thin film approach was used to fabricate large-surface MoS2 nanosheet thin film supercapacitors. The charge storage performances of the thin films exhibited an unusual increase in capacitance on extended cycling. This enhancement in capacitance was attributed to the nucleation of a new MoS2-xOx phase during cycling, shifting the charge storage process from diffusion-limited to capacitive-dominant.
Article
Energy & Fuels
Ravindra N. Bulakhe, Su Cheol Shin, Jung Bin In, Insik In
Summary: A facile, inexpensive, and template-free strategy was used to synthesize nickel cobaltite with high specific surface area and specific capacities for supercapacitor applications. The study showed excellent cyclic stability and high performance of the synthesized materials.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Materials Science, Multidisciplinary
Muharrem Kunduraci, Dogan Cirmi, Selda Dogan Calhan, Ugur Caglayan
Summary: In this study, nickel-based thin film electrodes were electrodeposited onto copper substrate using a deep eutectic solvent, and their supercapacitor performance in alkaline KOH solution was greatly enhanced by altering the surface roughness of coatings. Two approaches were taken to create a rougher surface: preparing Ni-only coatings at different deposition potentials and electrodepositing Ni-Zn binary coatings with varying zinc concentration. Both approaches led to noticeable improvements in the capacitance of nickel electrodes. The linear relationship discovered between cathodic peak currents and polarization values in cyclic voltammetry scans of electrodes suggests a potential novel finding in the literature.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2021)
Article
Energy & Fuels
Dianyuan Zheng, Chengxiang Sun, Wenxia Pan, Gengtao Guo, Yuhang Zheng, Cheng Liu, Jianhong Zhu
Summary: This study introduces a cost-effective high-performance asymmetric supercapacitor utilizing functionalized carbon nanotube film and Fe2O3@C nanocomposite grown on carbon paper. The device shows a wide working potential window and excellent electrochemical properties, making it suitable for applications in electrical vehicles, smart power grids, and intermittent renewable energy sources.
Article
Chemistry, Multidisciplinary
Dianyuan Zheng, Chengxiang Sun, Rongbin Yao, Jinli Li, Yuhang Zheng, Jianhong Zhu, Cheng Liu
Summary: In this work, a binary composite of La(OH)(3)@Ni(OH)(2) on carboxyl graphene (La@Ni/CG) was synthesized as an electrode material. The La@Ni/CG composite exhibited improved electrochemical properties, including high specific capacitance (1334.7 F g(-1) at 1.4 A g(-1)), capacity retention of 90.6% even after 3000 cycles, and excellent rate capability. These improvements can be attributed to the synergistic effect of surface adsorption and conductive pathways provided by the multiple active species in the composite.
Article
Chemistry, Multidisciplinary
Chengxiang Sun, Wenxia Pan, Dianyuan Zheng, Gengtao Guo, Yuhang Zheng, Jianhong Zhu, Cheng Liu
Summary: A squirrel cage structure Fe3O4@carbon nanocomposite was prepared through a facile chemical precipitation method, with carbon playing critical roles in maintaining structural stability and facilitating electron transportation. The iron oxide nanoparticles exhibited superior reversible redox characteristics, leading to increased supercapacitor performance. Assembling an aqueous asymmetric supercapacitor using CNT@Ni(OH)(2) positive electrode and Fe3O4@carbon negative electrode resulted in high energy density and power density.
Article
Energy & Fuels
Chengxiang Sun, Wenxia Pan, Dianyuan Zheng, Rongbin Yao, Yuhang Zheng, Jianhong Zhu, Daiwen Jia
Article
Chemistry, Analytical
Chengxiang Sun, Wenxia Pan, Dianyuan Zheng, Yuhang Zheng, Jianhong Zhu
ANALYTICAL METHODS
(2019)