A5046281122- Supercapacitor Materials and Fabrication
- Graphene research and applications
- Advancements in Battery Materials
- Advanced Sensor and Energy Harvesting Materials
- Conducting polymers and applications
- Advanced battery technologies research
- Carbon and Quantum Dots Applications
- Electrospun Nanofibers in Biomedical Applications
- Electrochemical sensors and biosensors
- MXene and MAX Phase Materials
- Graphene and Nanomaterials Applications
- Thermal properties of materials
- Nanomaterials for catalytic reactions
- Thermochemical Biomass Conversion Processes
- Electrochemical Analysis and Applications
- Pesticide Residue Analysis and Safety
- Advanced Battery Materials and Technologies
- Fire dynamics and safety research
- Phase Change Materials Research
- Antibiotics Pharmacokinetics and Efficacy
- Dielectric materials and actuators
- Adsorption and biosorption for pollutant removal
- Thermal and Kinetic Analysis
- Analytical chemistry methods development
- Solar-Powered Water Purification Methods
Zhuhai Fudan Innovation Research Institute
2023-2024
Tsinghua University
2022-2023
Tsinghua–Berkeley Shenzhen Institute
2022-2023
Beijing Forestry University
2017-2020
National Physical Laboratory
2019
Beijing Haidian Hospital
2018
Abstract High theoretical capacitance of MnO 2 nanoparticles were successfully electrodeposited on the conductive graphene/activated carbon (GN/AC) composite film, and urchin type microspheres controlled by adjusting electro-deposition reaction times. The GN/AC/MnO -1200s electrodes exhibited a maximum specific 1231 mF/cm (MnO loading mass 7.65 mg/cm 123 F/g) at current density 0.5 mA/cm . assembled flexible solid-state symmetric supercapacitor had good mechanical flexibility (about 88.6%...
Ball milling is a widely used method to produce graphene and other two-dimensional (2D) materials for both industry research. Conventional ball generates strong impact forces, producing small thick nanosheets that limit their applications. In this study, viscous solvent-assisted planetary has been developed large thin 2D nanosheets. The solvent simultaneously increases the exfoliation energy (Ee) lowers (Ei). Simulations show giant ratio of η = Ee/Ei, solvent, 2 orders magnitude larger than...
Aggregation of two-dimensional (2D) nanosheet fillers in a polymer matrix is prevalent problem when the filler loading high, leading to degradation physical and mechanical properties composite. To avoid aggregation, low-weight fraction 2D material (<5 wt %) usually used fabricate composite, limiting performance improvement. Here, we develop interlocking strategy where well-dispersed high filling content (up 20 boron nitride nanosheets (BNNSs) can be incorporated into polytetrafluoroethylene...
A ternary composite of graphene/activated carbon/polypyrrole (GN/AC/PPy) used as an electrode active material for supercapacitors has been synthesized <italic>via</italic> vacuum filtration and anodic constant current deposition methods.
Free-standing, binder-free and flexible activated carbon/reduced graphene oxide (AC/rGO) composite films with various ratios were fabricated <italic>via</italic> a facile vacuum-filtration process.
In this paper, litchi-like microspheres structures of NiCo2Se4@carbon (NCSC) hybrids were successfully synthesized via a simple two-step hydrothermal method. The effects the content NiCo2Se4 on structure NCSC composites are investigated. morphology and nanostructure as-obtained examined by XRD, XPS, FESEM TEM. results indicate that carbon (CM) uniformly covered with increase content, superficies also exhibits homogeneous rough nanoparticles regular spheres connect each other. Meanwhile,...
Advanced two-dimensional (2D) MXenes have been extensively researched as electrode materials for flexible supercapacitors due to their excellent electronic performance and flexibility. Herein, a facile effective approach is adopted synthesize polypyrrole@bacterial cellulose/MXene (PPy@BC/MXene) hybrid film through plunge-freezing vacuum-assisted filtration self-assembly strategy. We constructed an ordered "building frame structure" with MXene the "beam slab" cellulose (PPy@BC) "pillar."...
Waste fiberboards were used to produce N, O co-doped carbon dots (CDs) by acid etching method. The graphene hydrogels decorated with CDs (GCD) synthesized via hydrothermal method and optimized through different mass ratios. optimal composite electrode exhibited a high specific capacitance of 335.1 F g−1 at 1 A g−1, good mechanical flexibility about 90.6% retention after 500 bending/unbending cycles. Furthermore, the assembled flexible supercapacitor owned an ideal cycling stability 83.4%...
Flexible supercapacitors (FSCs) have attracted widespread attention of many researchers as a type portable energy storage devices. However, there are still challenges in preparing renewable and inexpensive electrode materials. Herein, we prepared the porous carbon (PC) by two-step process involving hydrothermal method low-temperature heat treatment using corn cob lignin source, different types for PC were obtained changing temperature low (100 °C–300 °C). The flexible film was combining...
A simple and low-cost approach toward flexible free-standing electrodes is developed.
In this work, the [email protected] Cd(2-methylimidazole)2 ([email protected]) was synthesized by two facile methods, in which original cubic Pd nanoparticles anchored on surface/interface of CdIF-8 and supported acidified activated carbon (AAC). Interestingly, exhibited sphericity under hydrothermal condition presented hexahedron mild liquid. A(B)-Pdx[email hybrids are researched FESEM, TEM, contact angle measurement, XPS, XRD BET analytical techniques. employed as nonenzymatic sensors for...
Phase change materials (PCMs) are promising in many fields related to energy utilization and thermal management. However, the low conductivity poor shape stability of PCMs restrict their direct conversion storage. The desired properties for not only high excellent stability, but also latent heat retention. In this study, boron nitride nanosheets (BNNSs) were bridged by small amounts GO successfully self-assembled into BNNS/rGO (BG) aerogels hydrothermal freeze-drying processes. BG with...
A simple and template-free method for fabrication of a modified porous graphene hydrogel electrode was developed. The involved adding natural organic phytate in the pure hydrogels. Benefiting from introduced phosphate groups positively charged metal ions, flexible magnesium phytate/graphene (Mg-P/G) showed large specific capacitance 281 F/g with small charge transfer resistance 0.3 Ω. Furthermore, supercapacitor prominent cycling stability (about 100% retention over 10000 cycles) excellent...
A graphene/activated carbon/MnO<sub>2</sub> (GAM) composite was synthesized by transferring to a hydrothermal synthesis reactor and maintained at 140 °C for 2 h.
Poplar wood pulp was adopted as both frame and precursor for the synthesis of fiber (PF)/reduced graphene oxide composite via a simple low-cost method. In this method, PF based on (PFG) film electrode prepared by vacuum filtration process with various ratios (PF: reduced (RGO) = 5:1, PF:RGO 5:2, 5:3, 5:4, 5:5). terms special structures, PFG can be used electrodes without metal-collector, adhesives, additives. The optimal ratio (PF:RGO 5:4) displayed high areal-specific capacitance 683 mF/cm2...
A simple method was developed to prepare tannic acid-decorated spongy graphene hydrogel (TAGH) as interconnected, three-dimensional (3D) porous network supercapacitor electrode materials. Tannic acid (TA) not only can be fully competent in reducing oxide and stabilizing reduced oxide, but also prevent sheets from agglomerating by suppressing the π-π stacking interactions. Such 3D TAGH electrodes with low charge transfer resistance of 0.4 Ω.cm2 displayed a maximum specific capacitance 533 F/g...
The graphene/Co<sub>3</sub>O<sub>4</sub>/activated carbon (GCA) 1 : 9 capacitor shows the best electrochemical properties with Co<sub>3</sub>O<sub>4</sub> particles that were homogeneously dispersed between graphene/Co<sub>3</sub>O<sub>4</sub> (GC) layers.
Tannin-doped activated carbon by employing tannin as the structure coupling bridge between two components could effectively tune electronic structural states and result in strong effects with NiCo<sub>2</sub>Se<sub>4</sub>.
A simple and template-free method for the fabrication of modified pulp fiber (PF)–polyacrylamide (PAM)–graphene (RGO) composite electrodes was developed.