A5100669129- Advancements in Battery Materials
- Conducting polymers and applications
- Advanced Battery Materials and Technologies
- Organic Electronics and Photovoltaics
- Perovskite Materials and Applications
- Advanced Sensor and Energy Harvesting Materials
- Semiconductor materials and devices
- Advanced Battery Technologies Research
- Semiconductor Quantum Structures and Devices
- Graphene research and applications
- Advanced battery technologies research
- X-ray Diffraction in Crystallography
- Electronic and Structural Properties of Oxides
- Catalytic Processes in Materials Science
- Chemical Synthesis and Reactions
- Porphyrin and Phthalocyanine Chemistry
- Crystallization and Solubility Studies
- Diamond and Carbon-based Materials Research
- Sulfur-Based Synthesis Techniques
- Quantum Dots Synthesis And Properties
- Supramolecular Chemistry and Complexes
- Advanced Memory and Neural Computing
- Nanowire Synthesis and Applications
- Semiconductor Lasers and Optical Devices
- Advanced ceramic materials synthesis
UNSW Sydney
2020-2025
Korea Advanced Institute of Science and Technology
2011-2024
Korea Institute of Science and Technology
2024
Korea University
2024
Kangwon National University
2024
Hanyang University
2002-2024
Cheongju University
2022-2023
Kyung Hee University
2020-2022
Hanbat National University
2022
Daejeon University
2015-2021
Aqueous rechargeable zinc batteries (ZBs) have received considerable attention recently for large-scale energy storage systems in terms of rate performance, cost, and safety. Nevertheless, these ZBs still remain a subject investigation, as researchers search cathode materials enabling high performance. Among the various candidate ZBs, quinone compounds stand out candidates because their specific capacity, sustainability, low cost. Quinone-based cathodes, however, suffer from critical...
The Na0.44MnO2 structure is a promising cathode material for sodium ion batteries due to high capacity (∼130 mAh/g) and good cycle performance. In this work, we present the results of density functional theory (DFT) calculations on structural electrochemical properties Na0.44MnO2, combined with experiments. Seven intermediate phases two-phase reactions among them were found, where calculated voltage profile agreed well We found that S-shaped tunnel not empty in deintercalated Na0.22MnO2 but...
Pumps and motors are essential components of the world as we know it. From complex proteins that sustain our cells, to mechanical marvels power industries, much take for granted is only possible because pumps motors. Although molecular have supported life eons, it recently chemists made progress toward designing building artificial forms microscopic machinery present in nature. The advent machines has scientists an unprecedented level control over relative motion molecules through...
We develop an effective strategy to obtain polymer solar cells with high power conversion efficiency (17%) and remarkable mechanical robustness, by design of donors aliphatic flexible spacer incorporated into a rigid backbone.
The self-healing properties and ionic sensing capabilities of the human skin offer inspiring groundwork for designs stretchable iontronic skins. However, from electronic to mechanosensitive skins, simultaneously achieving autonomously superior properties, elasticity, effective control ion dynamics in a homogeneous system is rarely feasible. Here, we report Cl-functionalized pressure sensitive material (CLiPS), designed via introduction groups into polyurethane matrix, which realizes an...
High power conversion efficiency (PCE) and stretchability are the dual requirements for wearable application of polymer solar cells (PSCs). However, most efficient photoactive films mechanically brittle. In this work, highly (PCE = 18%) robust (crack-onset strain (COS) PSCs acheived by designing block copolymer (BCP) donors, PM6-b-PDMSx (x 5k, 12k, 19k). these BCP stretchable poly(dimethylsiloxane) (PDMS) blocks covalently linked with PM6 to effectively increase stretchability. The donors...
Abstract High power conversion efficiency (PCE), long‐term stability, and mechanical robustness are prerequisites for the commercial applications of organic solar cells (OSCs). In this study, a new star‐shaped trimer acceptor (TYT‐S) is developed high‐performance OSCs with PCE 19.0%, high photo‐stability ( t 80% lifetime = 2600 h under 1‐sun illumination), crack‐onset strain (COS) 21.6% achieved. The isotropic molecular structure TYT‐S affords efficient multi‐directional charge transport...
The development of advanced materials capable autonomous self-healing and mechanical stimulus sensing in aquatic environments holds great promise for applications underwater soft electronics, robotics, water-resistant human-machine interfaces. However, achieving superior properties effective simultaneously an environment is rarely feasible. Here, we present ultrafast molecularly engineered piezo-ionic elastomer inspired by the cephalopod's suckers, which possess mechanosensitive ion...
Organic rechargeable batteries, composed of redox-active molecules, are emerging as candidates for the next generation energy storage materials because their large specific capacities, cost effectiveness, and abundance organic precursors, when compared with conventional lithium-ion batteries. Although molecules often display multiple redox states, precise control a molecule's potential, leading to single output voltage in battery, remains fundamental challenge this popular field research. By...
An aqueous sodium ion hybrid battery consisting of disodium naphthalenediimide salt (anode) and KCo0.5Cu0.5Fe(CN)6 (cathode) is reported. Both electrode materials are inexpensive exhibit appropriate operating voltages robust reversibility under neutral electrolyte conditions, delivering a full-cell voltage 1.1 V with 88% capacity retention after 100 cycles. As service to our authors readers, this journal provides supporting information supplied by the authors. Such peer reviewed may be...
Abstract Recent progress in highly efficient perovskite solar cells (PSCs) has been made by virtue of interfacial engineering on 3D surfaces for their defect control, however, the structural stability modified interface against external stimuli still remains unresolved. Herein, 4‐dimethylaminopyridine (DMAP) is introduced to develop a facile technique selectively passivating grain boundary (GB) and controlling topographical surface near GB. Through treatment DMAP, strongly bound DMAP...
Abstract Organic solar cells (OSCs) are promising wearable/stretchable power sources, but the development of high‐performance intrinsically stretchable OSCs (IS‐OSCs) has rarely been reported. Herein, IS‐OSCs exhibiting high conversion efficiencies (PCEs) (>12%) and excellent stretchability developed by constructing efficient mechanically robust active layers via addition a high‐molecular weight polymer acceptor ( P A ) to donor:small‐molecule blends. significantly enhances PCEs blends as...
Abstract Layered transition metal oxides, in particular P2‐type ones, are considered as promising cathode materials for sodium‐ion batteries on account of their high specific capacity and rate capability. Nevertheless, conventional layered compounds involve detrimental phase transformation throughout repeated cycles, which results electrochemical performance degradation. Therefore, finding structurally stable compounds, featuring minimal has been a key theme the battery research. Here...
Small-molecule acceptor (SMA)-based organic solar cells (OSCs) have achieved high power conversion efficiencies (PCEs), while their long-term stabilities remain to be improved meet the requirements for real applications. Herein, we demonstrate use of donor-acceptor alternating copolymer-type compatibilizers (DACCs) in high-performance SMA-based OSCs, enhancing PCE, thermal stability, and mechanical robustness simultaneously. Detailed experimental computational studies reveal that addition...
All-polymer solar cells (all-PSCs) possess attractive merits including superior thermal stability and mechanical flexibility for large-area roll-to-roll processing. Introducing flexible conjugation-break spacers (FCBSs) into backbones of polymer donor (PD) or acceptor (PA) has been demonstrated as an efficient approach to enhance both the photovoltaic (PV) properties all-PSCs. However, length dependency FCBS on certain all-PSC related not systematically explored. In this regard, we report a...
Artificial synapses inspired by the information processing mechanism of human neural system serve as a platform to develop low-voltage operated high performance bioelectronics and advanced health monitoring systems.
We have demonstrated that even small structural variations on the imide nitrogens of naphthalenediimides bearing identical Li-ion binding sites can cause dramatic effects in performance organic rechargeable batteries. In particular, naphthalenedimide dilithium salt showed excellent cycling with a capacity 130 mA h g−1 at potentials as high 2.5 V vs. Li/Li+.
Abstract Artificial molecular machines can be operated using either physical or chemical inputs. Light‐powered motors display clean and autonomous operations, whereas chemically driven generate waste products are intermittent in their motions. Herein, we show that controlled changes applied electrochemical potentials drive the operation of artificial pumps a semi‐autonomous manner—that is, without need for consecutive additions fuel(s). The electroanalytical approach described this...
A major challenge in the industrial use of enzymes is maintaining their stability at elevated temperatures and harsh organic solvents. In order to address this issue, we investigated nanotubes as a support material for immobilization stabilization work. SnO2 hollow with high surface area were synthesized by electrospinning SnCl2 precursor polyvinylpyrrolidone (dissolved dimethyl formamide ethanol). The electrospun product was used covalent such lipase, horseradish peroxidase, glucose...
Designing small-molecule organic redox-active materials, with potential applications in energy storage, has received considerable interest of late. Herein, we report on the synthesis, characterization, and application two rigid chiral triangles, each which consist non-identical pyromellitic diimide (PMDI) naphthalene (NDI)-based units. (1)H (13)C NMR spectroscopic investigations solution confirm lower symmetry (C2 point group) associated these isosceles triangles. Single-crystal X-ray...
A highly stretchable and tissue-adhesive multifunctional sensor based on structurally engineered islets embedded in ultra-soft hydrogel is reported for monitoring of bladder activity overactive (OAB) induced rat anesthetized pig. The use yielded a much lower modulus (1 kPa) compared to that the (300 kPa), while strong adhesiveness (adhesive strength: 260.86 N/m) allowed firm attachment onto bladder. change resistance printed liquid metal particle thin-film lines under strain were used detect...