Il‐Doo Kim 교수

Abstract Hierarchical SnO 2 fibers assembled from wrinkled thin tubes are synthesized by controlling the microphase separation between tin precursors and polymers, by varying flow rates during electrospinning and a subsequent heat treatment. The inner and outer SnO 2 tubes have a number of elongated open pores ranging from 10 nm to 500 nm in length along the fiber direction, enabling fast transport of gas molecules to the entire thin‐walled sensing layers. These features admit exhaled gases such

Abstract Designing energy storage devices from thick carbon electrodes with high areal/volumetric energy density via a simple and green way is very attractive but still challenging. Cellulose, as an excellent precursor for thick carbon electrodes with abundant sources and low cost, is usually activated by a chemical activator and pyrolysis route to achieve high electrochemical performance. However, there are still some problems to be addressed, such as the harsh activation conditions, easy colla

A concise review discussing four molecular engineering strategies for a rational design of carbonyl electrodes is provided, encompassing key fundamentals, recent advances, and challenges for practical organic batteries.

The use of Ti 3 C 2 T x MXenes/polyaniline composite tremendously improved the electrokinetic energy conversion efficiencies of nano-hydroelectric generators, demonstrating a power output sufficient to charge a commercial battery for the very first time.

For the proliferation of the supercapacitor technology, it is essential to attain superior areal and volumetric performance. Nevertheless, maintaining stable areal/volumetric capacitance and rate capability, especially for thick electrodes, remains a fundamental challenge. Here, for the first time, a rationally designed porous monolithic electrode is reported with high thickness of 800 µm (46.74 mg cm^-2 , with high areal mass loading of NiCo₂ S₄ 6.9 mg cm<sup>-2<

Safe and long cycle life electrode materials for lithium-ion batteries are significantly important to meet the increasing demands of rechargeable batteries. Niobium pentoxide (Nb₂ O₅ ) is one of the highly promising candidates for stable electrodes due to its safety and minimal volume expansion. Nevertheless, pulverization and low conductivity of Nb₂ O₅ have remained as inherent challenges for its practical use as viable electrodes. A highly facile met

Graphene/silver nanowire (AgNWs) stacked electrodes, i.e., graphene/AgNWs, are fabricated on a glass substrate by air-spray coating of AgNWs followed by subsequent encapsulation via a wet transfer of single-layer graphene (SLG) and multilayer graphene (MLG, reference specimen) sheets. Here, graphene is introduced to improve the optical sintering efficiency of a xenon flash lamp by controlling optical transparency and light absorbing yield in stacked graphene/AgNW electrodes, facilitating the fus

A lithographic strategy to fabricate a 3D periodic nano-network of multi-electron redox-active polyimide is proposed, realizing ultrahigh rates up to 400C for lithium-ion storage of organic anodes.

Nanoscale materials offer enormous opportunities for catalysis, sensing, energy storage, and so on, along with their superior surface activity and extremely large surface area. Unfortunately, their strong reactivity causes severe degradation and oxidation even under ambient conditions and thereby deteriorates long-term usability. Here superlative stable graphene-encapsulated nanoparticles with a narrow diameter distribution prepared via in situ chemical vapor deposition (CVD) are presented. The

Graphene oxide (GO) doping and reduction allow for physicochemical property modification to suit practical application needs. Herein, the challenge of simultaneous low-thermal-budget heteroatom doping of GO and its reduction in ambient air is addressed through the synthesis of B-doped reduced GO (B@rGO) by flash irradiation of boric acid loaded onto a GO support with intense pulsed light (IPL). The effects of light power and number of shots on the in-depth sequential doping and reduction mechani

We systematically study the explicit roles of noble metal catalysts in steering the gas selectivity of metal oxides toward specific target analytes by using highly dispersed catalysts on In 2 O 3 nanofibers as a consistent synthetic platform.

Ni-rich cathode-electrolyte interface is stabilized by using an ultra-thin Al 2 O 3 protective layer deposited by face-to-face target sputtering (FTS) for high-performance lithium-ion batteries.

La 0.5 Sr 0.5 CoO 3 (LSCO) and LaNi 0.6 Co 0.4 O 3 (LNCO) thin films were deposited on Pt/Ti/SiO 2 /Si substrates by DC reactive sputtering at 450°C and were annealed at temperatures ranging from 550°C to 750°C for 30 min in an O 2 ambient to improve the crystallinity of the films and to reduce their resistivity. LSCO and LNCO thin films were successfully prepared at temperatures as low as 450°C. Pb(Zr 0.48 Ti 0.52 )O 3 (PZT) thin films of 150 nm thickness were deposited on the LSCO and LNCO ele

This work presents the synthesis of LaFeO 3 /SnO 2 nanotubes (NTs) based on the GRR process, with perovskite LaFeO 3 NTs prepared by electrospun nanofibers as the starting material resulting in a significantly enhanced catalytic activity.