synthesizing-gel-polymer-electrolyte-for-supercapacitors-assembling

Synthesizing a Gel Polymer Electrolyte for Supercapacitors, Assembling a Supercapacitor Using a Coin Cell, and Measuring Gel Electrolyte Performance

Supercapacitors (SC) have attracted attention as energy storage devices due to their high density and long cycle performance. SCs used in devices ...

elaborate-control-inkjet-printer-for-fabrication-chip-based

Elaborate Control of Inkjet Printer for Fabrication of Chip-based Supercapacitors

There are tremendous efforts in various fields to apply the inkjet printing method for the fabrication of wearable devices, displays, and energy storage ...

evaluating-electrochemical-properties-supercapacitors-using-three

Evaluating the Electrochemical Properties of Supercapacitors using the Three-Electrode System

The three-electrode system is a basic and general analytical platform for investigating the electrochemical performance and characteristics of energy ...

chung-ang university

Chung-Ang University

A Gram-stain-negative, aerobic, short rod-shaped, pale yellow-pigmented, non-motile and gentamycin-resistant bacterial strain designated CJ210 was isolated from the Han River, Republic of Korea. Strain CJ210 grew optimally at 30 °C and pH 7.0 in the absence of NaCl on tryptic soy agar. Flexirubin-type pigments were not produced. Phylogenetic analysis based on 16S rRNA gene sequence similarity showed that strain CJ210 belonged to the genus  within the family  and was most closely related to  KACC 14347 (98.1 % similarity), followed by  KCTC 23367 (95.3 % similarity). The average nucleotide identity values between strain CJ210 and two closely related type strains  KACC 14347 and  KCTC 23367 were 83.7 and 73.8 %, respectively. The digital DNA-DNA hybridization results between strain CJ210 and the related type strains were 27.5 and 20.2 %, respectively. Strain CJ210 contained menaquinone 6 (MK-6) as the predominant menaquinone. The predominant polar lipids were phosphatidylethanolamine, two unidentified aminolipids and two unidentified lipids. The major fatty acids of strain CJ210 were iso-C, iso-C 3-OH and summed feature 9 (comprising iso-C 9 and/or C 10-methyl). Whole genome sequencing revealed that strain CJ210 had a genome of 3.8 Mbp with 36.5 % DNA G+C content. The genome contained several antimicrobial resistance genes including an aminoglycoside-resistant gene. On the basis of the polyphasic taxonomic study, strain CJ210 represents a novel species in the genus , for which name  sp. nov. is proposed. The type strain is CJ210 (=KACC 19954=JCM 33306).

 sp. nov., isolated from the Han River, Republic of Korea.

The spread of wearable and flexible electronics devices has been accelerating in recent years for a wide range of applications. Development of an appropriate flexible power source to operate these flexible devices is a key challenge. Supercapacitors are attractive for powering portable lightweight consumer devices due to their long cycle stability, fast charge-discharge cycle, outstanding power density, wide operating temperatures and safety. Much effort has been devoted to ensure high mechanical and electrochemical stability upon bending, folding or stretching and to develop flexible electrodes, substrates and overall geometrically-flexible structures. Supercapacitors have attracted considerable attention and shown many applications on various scales. In this review, we focus on flexible structural design under six categories: paper-like, textile-like, wire-like, origami, biomimetics based design and micro-supercapacitors. Finally, we present our perspective of flexible supercapacitors and emphasize current technical difficulties to stimulate further research.

Methodologies for Fabricating Flexible Supercapacitors.

Despite its importance for the establishment of a carbon-neutral society, the electrochemical reduction of CO  to value-added products has not been commercialized yet because of its sluggish kinetics and low selectivity. The present work reports the fabrication of a low-crystalline trimetallic (AuCuIn) CO  electroreduction catalyst and demonstrates its high performance in a gaseous CO  electrolyzer. The high Faradaic efficiency (FE) of CO formation observed at a low overpotential in a half-cell test is ascribed to the controlled crystallinity and composition of this catalyst as well as to its faster charge transfer, downshifted d-band center, and low oxophilicity. The gaseous CO  electrolyzer with the optimal catalyst as the cathode exhibits superior cell performance with a high CO FE and production rate, outperforming state-of-the-art analogs. Thus, the obtained results pave the way to the commercialization of CO  electrolyzers and promote the establishment of a greener society.

Low-Crystalline AuCuIn Catalyst for Gaseous CO  Electrolyzer.

We assemble a film of a phosphocholine-based lipid and a crystalline conjugated polymer using hydrophobic interactions between the alkyl tails of the lipid and alkyl side chains of the polymer, and demonstrated its selective gas adsorption properties and the polymer's improved light absorption properties. We show that a strong attractive interaction between the polar lipid heads and CO was responsible for 6 times more CO being adsorbed onto the assembly than N, and that with repeated CO adsorption and vacuuming procedures, the assembly structures of the lipid-polymer assembly were irreversibly changed, as demonstrated by  grazing-incidence X-ray diffraction during the gas adsorption and desorption. Despite the disruption of the lipid structure caused by adsorbed polar gas molecules on polar head groups, gas adsorption could promote orderly alkyl chain packing by inducing compressive strain, resulting in enhanced electron delocalization of conjugated backbones and bathochromic light absorption. The findings suggest that merging the structures of the crystalline functional polymer and lipid bilayer is a viable option for solar energy-converting systems that use conjugated polymers as a light harvester and the polar heads as CO-capturing sites.

Seohyeon Jang

chung-ang university

Synthesizing a Gel Polymer Electrolyte for Supercapacitors, Assembling a Supercapacitor Using a Coin Cell, and Measuring Gel Electrolyte Performance

Elaborate Control of Inkjet Printer for Fabrication of Chip-based Supercapacitors

Evaluating the Electrochemical Properties of Supercapacitors using the Three-Electrode System