A5038139289- Supercapacitor Materials and Fabrication
- Advancements in Battery Materials
- Advanced battery technologies research
- Conducting polymers and applications
- Graphene research and applications
- Advanced Battery Materials and Technologies
- Advanced Sensor and Energy Harvesting Materials
- Membrane-based Ion Separation Techniques
- Advanced Battery Technologies Research
- Fuel Cells and Related Materials
- Carbon Nanotubes in Composites
- Electrocatalysts for Energy Conversion
- Thermal properties of materials
- Membrane Separation Technologies
- Additive Manufacturing and 3D Printing Technologies
- ZnO doping and properties
- MXene and MAX Phase Materials
- Metal-Organic Frameworks: Synthesis and Applications
- Electric and Hybrid Vehicle Technologies
- Tribology and Wear Analysis
- Catalytic Processes in Materials Science
- Copper-based nanomaterials and applications
- Transition Metal Oxide Nanomaterials
- Anodic Oxide Films and Nanostructures
- Catalysis and Hydrodesulfurization Studies
Korea Institute of Energy Research
2013-2024
Daejeon University
2015-2017
Government of the Republic of Korea
2017
Hanbat National University
2013
Korea Advanced Institute of Science and Technology
2007-2011
Rice University
2011
With the advent of atomically thin and flat layers conducting materials such as graphene, new designs for film energy storage devices with good performance have become possible. Here, we report an “in-plane” fabrication approach ultrathin supercapacitors based on electrodes comprised pristine graphene multilayer reduced oxide. The in-plane design is straightforward to implement exploits efficiently surface each layer storage. open architecture effect edges enable even thinnest devices, made...
For incompletely reduced graphene oxides (RGOs), an effect of oxygen functional groups such as carboxyl, phenol, carbonyl, and quinone on electrochemical capacitive behavior was studied. To prepare RGO thin-film electrodes, a simple fabrication process by (i) dropping evaporating the oxide (GO) solution, (ii) irradiating pulsed light, (iii) heat-treating at 200 ∼ 360 °C applied. It notable that light irradiation effective to prevent disfiguring deposited GO during thermal reduction. From XRD...
Carbon materials derived from biomass offer promising prospects for energy storage due to their eco-friendly nature, abundance, and distinctive porous structures. In this study, starch powder was used synthesise activated biocarbon supercapacitor electrodes. Spherical carbon particles with an average diameter of 250 nm were obtained using hydrothermal synthesis followed by chemical activation KOH solution. Physical properties analysed scanning electron microscopy, X-ray diffraction, Raman...
Microsupercapacitors are microscale rechargeable energy storage devices that can support or replace batteries in ultrasmall electronic devices. Although the use of high-capacitive, two-dimensional materials is promising, other methods needed to reach a high capacitance and density, which cannot be achieved by fully utilizing surface electrode materials. Here, we introduce an effective strategy control geometry interdigital microelectrodes for achieving ultrahigh edge effect in-plane...
Developing of high-energy, high-power-density energy storage devices is challenging. Despite being promising electrode materials for these devices, metal–organic frameworks (MOFs) have poor electrical conductivity and weak ligand–metal coordination. Here, the highly conductive MOF, Ni3(HITP)2, which comprises radially oriented microspheres, adopted as anode Li-ion capacitors (LICs). The half-cell demonstrates high reversible capacity (834 mAh g−1) at 50 mA g−1 with minimal reduction,...
Abstract Rechargeable aqueous zinc (Zn) ion batteries (AZIBs) are gaining popularity in large‐scale energy storage due to their low cost, high safety, and environmental friendliness; however, dendrite growth side reactions Zn metal anodes limit practical applications. Additionally, the difficulty of developing successful passivation anodes, combined with large‐area coating protective layers, remains a major limitation commercialization AZIBs. Here, we introduce two‐dimensional (2D)...
We report a high-performance redox flow capacitor by using redox-active hydroquinone-based pseudocapacitive slurry electrodes.
Capacitive deionization (CDI) using a flow-electrode primarily composed of porous materials and an aqueous electrolyte, exhibits continuous high desalting efficiency. The development flow-electrodes with capacitance low resistance is essential for achieving efficient capacitive (FCDI) system energy consumption. For this purpose, studies on conductive additives (CAs) that do not clog the flow-channel must be conducted. Here, we evaluated performance spherical plate-type having sizes between 1...
The mussel-inspired surface modification for high-performance electrochemical capacitors is demonstrated.
Abstract The piezoelectric nanogenerator (PENG) has the potential to become a promising power supply for monitoring and sensors in Internet of Things (IoT) systems through wireless networks. In order further increase utilization energy harvesters an IoT system, we introduce novel approach that greatly enhances output performances by employing layer-by-layer (LbL) method. Poly(vinylidenefluoride-co-trifluoroethylene) (PVDF-TrFE) polymer film, which properties mechanical flexibility, was used...
Abstract By introducing a graphene oxide (GO) sheet as phase stabilizer and mechanical supporter, MoS 2 /GO hybrid films consisting of high concentration distorted 1T‐MoS are successfully fabricated through post‐annealing process in air with the form restacked film. After annealing process, nanosheets undergo direct binding oxygen functional groups GO, maintaining their highly conducting 1T leading to or 1T′‐MoS . A film‐based supercapacitor reveals significantly enhanced electrochemical...
Reduced graphene oxide (rGO)-based micro-supercapacitors (MSCs) have emerged as a new type of micro-energy storage device. However, the low volumetric energy density rGO hampers application MSCs in miniaturized devices. Hybridization pseudocapacitive materials with is potential approach to increase MSCs. Herein, densely packed hybrid film birnessite-type manganese (K-MnOx) supported by developed, and hybrid-film-based are found show high capacitance (490 F/cm3) that ∼ 1.2 19 times greater...
A novel 1D fluoro-thianthrene (TATH)-based redox-active metal–organic frameworks (denoted as SKIER-5) was introduced a highly stable wide-range temperature anode material for lithium storage.
Commercial carbon paper was coated with polyaniline (PANI) using in situ polymerization of aniline. Prior to the PANI coating, acid treatment performed carboxylate surface for enhancing adhesion by sonication a mixture concentrated sulfuric and nitric acids. The loading mass density on acid-treated increased more than three times compared that without treatment. specific capacitance also from 112 174 F/g two-electrode system (calculated total PANI) due better coating paper. simple provides...
Abstract Novel Li‐ion battery inks are integral elements to increase mechanical integrity and energy density of 3D printable batteries. Conventional have been limited the Polyvinylidene fluoride (PVdF) N‐methyl‐2 pyrrolidon (NMP) solvent that unpleasant long drying process environmentally hazard solvent. As a novel ink for highly densified batteries, we developed acrylate‐based curable which demonstrate fast process, cross‐linked polymerization more eco‐friend suspension. Here, report...
6M KOH 수계 전해액에 potassium poly(acrylate) (PAAK)를 3 wt% 포함시켜 제조한 하이드로겔을 poly(acrylonitrile)부직포 분리막에 코팅하고, 이를 활성탄 수퍼커패시터의 분리막 및 전해질로 사용하여 고율특성 향상을 시도하였다. 이 전해질은전자현미경 관찰 결과 PAAK 하이드로겔이 부직포의 표면기공에 균일하게 코팅되어 있으며, 24일 동안 하이드로겔의 합습도가 230% 이상으로 유지되었고, 6 M 전해액을 사용한 경우(<TEX>$3.6{\times}10^{-2}Scm^{-1}$</TEX>)보다 약간 낮은 <TEX>$2.9{\times}10^{-2}Scm^{-1}$</TEX>의 이온전도도를 나타내었다. 활성탄을 활물질로 대칭형 수퍼커패시터에 전해질을 채택한 경우 사이클릭볼타메트리 시험에서 <TEX>$1000mVs^{-1}$</TEX>의 고속스캔 조건에서도 <TEX>$27Fg^{-1}$</TEX> 이상의 높은 비축전용량과 1000 사이클...
We fabricated nanocomposite films comprising multi-walled carbon nanotubes (MWCNTs, diameter 10 ∼ 40 nm, length ≫ 1 μm) and nanocrystalline copper using a low cost electrochemical method. Owing to pulse deposition with several additives, MWCNTs were well-dispersed in the through thickness showed dense structure without any voids. For purpose of evaluation as candidate for electronic interconnection, elastic modulus, hardness, electrical resistivity, thermal conductivity MWCNT/Cu measured...