Article
Chemistry, Physical
Abdulhadi H. Almarri
Summary: This article presents a new approach to synthesize and stabilize titanium dioxide using polyol synthesis, and investigates the electrochromic properties of titanium dioxide thin films. The addition of a PEDOT:PSS hybrid composite film enhances the electrochromic performance of titanium dioxide. A flexible electrochromic device is successfully built, demonstrating reversible electrochromic properties.
Article
Chemistry, Applied
Keon-Woo Kim, Jae Kyeong Lee, Xiaowu Tang, Yujeong Lee, Jihyeon Yeo, Hong Chul Moon, Seung Woo Lee, Se Hyun Kim
Summary: EC materials, particularly EC polymers, show promise for applications in smart windows and information displays due to their color tuning capabilities. A new EC polymer with redox-active triphenylamine and viologen was synthesized and utilized in ECDs, demonstrating multiple colors based on applied voltage. Additionally, voltage-tunable multicolor EC displays were successfully created using EFAD printing.
Article
Chemistry, Multidisciplinary
Bin Deng, Yanan Zhu, Xiaowei Wang, Jinlin Zhu, Manyu Liu, Mingqiang Liu, Yaowu He, Caizhen Zhu, Chaohong Zhang, Hong Meng
Summary: This project aims to design a smart window that responds to both electricity and heat, achieving energy efficiency, privacy preservation, and enhanced decorative attributes. By using a novel electrochromic material design and optimizing electrochromic devices, high-performance ECDs with fast color-switching speed and significant transmittance modulation are obtained. Additionally, a thermochromic gel electrolyte is created to provide excellent thermal insulation and further enhance the window's performance. Overall, this work showcases a prospective design pathway for the development of next-generation ultrafast-switching, and energy-efficient intelligent windows.
ADVANCED MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Michael Lerond, A. Mohan Raj, Veronica Wu, W. G. Skene, Fabio Cicoira
Summary: Stretchable electrochromic devices were fabricated using electrospun PEDOT:PSS fibers, replacing the conventional ITO-glass electrodes. The devices could be stretched and bent, with improved color switching and contrast during operation.
Article
Polymer Science
Christopher Johannes, Sven Macher, Lukas Niklaus, Marco Schott, Hartmut Hillmer, Michael Hartung, Hans-Peter Heim
Summary: Electrochromic (EC) windows are widely used for thermal and glare protection in buildings, and are being developed for plastic-based applications. In this study, an EC film on a polycarbonate (PC) substrate was successfully fabricated and characterized. The film used poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS) as the working electrode and titanium dioxide (TiO2) as the counter electrode material, and showed promising optical and electrochemical properties.
Article
Chemistry, Applied
Yuewei Zhang, Xuchao Jin, Weiran Zhang, Chang Gu, Xuesong Liu, Yu-Mo Zhang
Summary: A bistable electrochromic device based on poly(viologen)s is demonstrated to have good overall performance, including long bistability, low switch-on voltage, and high reversibility. These results indicate that controlling the diffusivity of viologens is an effective approach to achieve excellent bistability and low energy consumption.
Article
Chemistry, Physical
Abdulhadi H. Almarri
Summary: The study developed highly conductive and transparent composite thin film-based PEDOT:PSS + BC by incorporating black carbon (BC) into PEDOT:PSS. The thin films made from the composite inks exhibited good durability, high transmittance modulations, and high coloration efficiency. The symmetric composite electrochromic devices based on this new method showed good stability, reversibility, and reversible color change from dark blue to transparent.
Article
Materials Science, Multidisciplinary
Suchita Kandpal, Ilya Ezhov, Manushree Tanwar, Denis Nazarov, Denis Olkhovskii, Leonid Filatov, Maxim Yu. Maximov, Rajesh Kumar
Summary: In order to design solid state hybrid or all-inorganic electrochromic devices, alternative methods for depositing electrochromic metal oxide thin films need to be explored. The electrochromic performance of a hybrid device using plasma assisted atomic layer deposition (ALD) grown nickel oxide (NiO) thin film and viologen was studied. The films of NiO with a thickness of a few tens of nanometers were first deposited on silicon, and then on Fluorine-doped Tin Oxide (FTO)/glass substrates to fabricate the device. The as-prepared films were analyzed for their structural and morphological properties, and a solid state organic-inorganic hybrid electrochromic device was fabricated. The device demonstrated impressive electrochromic behavior with high coloration efficiency, contrast ratio, and cycle life/stability. The ALD grown films showed advantage over other methods in terms of the smoothness and crack-free nature, allowing for proper power utilization in color switching. These results provide a new way to fabricate high-performance hybrid solid state electrochromic devices.
Article
Chemistry, Multidisciplinary
Xilu Wu, Qingchao Fan, Zhiyuan Bai, Qinghong Zhang, Weizhong Jiang, Yaogang Li, Chengyi Hou, Kerui Li, Hongzhi Wang
Summary: The cycling stability of viologens-based EC devices is improved using semi-interpenetrating dual-polymer network (DPN) organogels. The primary cross-linked poly(ionic liquid)s (PILs) anchor viologens to suppress irreversible aggregation. The secondary poly(vinylidenefluoride-co-hexafluoropropylene) (PVDF-HFP) chains confine viologens electrostatically and enhance mechanical performance. Large-area EC devices and EC fibers based on organogels demonstrate promising applications in green buildings and wearable electronics.
Article
Chemistry, Multidisciplinary
Tian Tan, Shaowei He, Guomei He, Jiangxi Chen
Summary: In this study, a viologen-containing polyurethane was synthesized and used to prepare an electrochromic device and a paper-based amine detector. The results showed that the polyurethane exhibited excellent electrochromic performance and the paper-based amine detector exhibited a highly sensitive color-change response to amine compounds.
NEW JOURNAL OF CHEMISTRY
(2023)
Article
Energy & Fuels
Marivone Gusatti, Daniel A. R. Souza, Sidney J. L. Ribeiro, Marcelo Nalin
Summary: In this study, a novel all-solid-state electrochromic device (ECD) was prepared using a cost-effective and industrially applicable spray coating technique, eliminating the use of indium tin oxide (ITO), tungsten(VI) oxide (WO3), and Li+ or any other liquid/gel electrolytes. The fabricated ECD demonstrated a reversible color change between a light-blue (off) and darkblue (on) state, with good and homogeneous contrast. The device exhibited a coloration efficiency of 174.62 cm2/C and cycle stability for at least 150 times.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2023)
Article
Nanoscience & Nanotechnology
Tanushree Ghosh, Suchita Kandpal, Chanchal Rani, Love Bansal, Manushree Tanwar, Rajesh Kumar
Summary: In this study, a versatile and easily processible electrochromic device based on polyaniline-Viologen (PANI-EV) was reported. The electrodes were individually characterized and the device showed improved electrochromic performance with fast switching time and good cycle life. The device could switch in visible, IR, and NIR regions with low bias voltage.
ADVANCED ELECTRONIC MATERIALS
(2023)
Article
Energy & Fuels
Rambabu Sydam, Manoranjan Ojha, Melepurath Deepa
Summary: The addition of a disodium salt of ethylenediamine tetra acetic acid (EDTA) to the ionogel electrolyte addresses the issue of poor efficiency and undesirable stacking in Heptyl viologen (HV) based electrochromic devices, resulting in improved performance metrics and thermal robustness.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2021)
Article
Materials Science, Multidisciplinary
Jun Hong Choi, Gopal Balamurugan, Gaurav K. Pande, Yu Seon Eom, Hyun-Kyung Kim, Dong Eun Cha, Jong S. Park
Summary: This study presents fully spray-coated electrochromic devices (ECDs) containing octa-viologen substituted polyhedral oligomeric silsesquioxane (OHV-POSS). Transmissive and reflective ECDs were fabricated on polyester and polycarbonate substrates, respectively, using different compositions and layer configurations. The electrodes were made of a mixture of silver nanowires and poly(3,4-ethylenedioxythiophene):poly (styrenesulfonate), and divinyl sulfone was used. The spray-coated plastic ECDs exhibited a low redox potential and reversible color changes.
Article
Energy & Fuels
Cyril Perie, Valentin Mary, Brandon Faceira, Aline Rougier
Summary: This study investigates a novel approach of color modulation: electrolyte coloration. By adding pigments in the electrolyte, color tuning can be achieved, providing endless possibilities. The results show that the switching times and capacities are similar between different colored electrolytes, demonstrating that this method does not compromise the stability of electrochromic devices.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2022)
Article
Chemistry, Multidisciplinary
Kyeong Eun Song, Sung Hun Woo, Seung Wook Baek, Hyunil Kang, Won Seok Choi, Jun Young Park, Jung Hyun Kim
Summary: In the SmBa1-xCaxCo2O5+d oxide systems, different compositions exhibited various electrical conductivity and metal-insulator transition behaviors. Among them, SBCCO-0.8 showed the highest electrical conductivity, while SBCCO-0.9 demonstrated excellent ASR characteristic at high temperature. The crystal structures of SBCCO were identified as orthorhombic, with unique X-ray diffraction peaks.
FRONTIERS IN CHEMISTRY
(2021)
Article
Engineering, Chemical
Shammya Afroze, Hidayatul Qayyimah Hj Hairul Absah, Md Sumon Reza, Mahendra Rao Somalu, Jun-Young Park, Saeed Nekoonam, Alibek Issakhov, Abul Kalam Azad
Summary: By employing the solid-state reaction method, lanthanum silicate apatite with high oxide ion conductivity and oxygen transportation at solid oxide fuel cells (SOFC) can be achieved. The structural and electrochemical properties of doped La10Si6-x-0.2AlxZn0.2O27-delta (x = 0.2 and 0.4) were characterized using XRD, SEM, EDX, and EIS techniques, revealing the highest total oxide ion conductivity and activation energy for La10Si5.6Al0.2Zn0.2O26.7 at 800 degrees C.
INTERNATIONAL JOURNAL OF CHEMICAL ENGINEERING
(2021)
Article
Materials Science, Ceramics
You-Dong Kim, Ja-Yoon Yang, Muhammad Saqib, Kwangho Park, Ji-seop Shin, Minkyoung Jo, Kwang Min Park, Hyung-Tae Lim, Sun-Ju Song, Jun-Young Park
Summary: The study focuses on Ba1-xNdxFeO3-delta as a potential air electrode material for reversible solid oxide cells. Doping Nd3+ into Ba-sites enhances electronic conductivity and reduces impurity phases, resulting in a material suitable for application in RSOCs. The lower doping concentration of Nd3+ leads to higher catalytic activity due to the creation of additional oxygen vacancies.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Physical
Sung Hun Woo, Seung-Wook Baek, Dae Soo Park, Kyeong Eun Song, Harald Schlegl, Jun-Young Park, Jung Hyun Kim
Summary: This study investigated the microstructural and electrochemical properties of two types of anode materials, showing that LSTM samples impregnated on Ni(R)/8YSZ exhibited higher electrical conductivity under dry H-2 conditions. XPS analysis revealed the presence of metallic titanium peaks on the surface of LSTM samples on Ni (R)/8YSZ, contributing to improved catalytic reaction. Additionally, LSTM samples on Ni (R)/8YSZ maintained stable electrical conductivity even after prolonged exposure to dry CH4 at 900 degrees C.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Ceramics
Ki Sang Baek, Seung-Wook Baek, Hyunil Kang, Wonseok Choi, Jun-Young Park, Stefan Saxin, Shin Ku Lee, Jung Hyun Kim
Summary: This study reports the electrical conductivity characteristics of SmBa0.5Sr0.5Co2O5+delta (SBSCO) and finds that sintering temperature and current range have an impact on its conductivity. Higher sintering temperature and lower current range result in higher electrical conductivity.
CERAMICS INTERNATIONAL
(2022)
Article
Energy & Fuels
Sung Hun Woo, Kyeong Eun Song, Seung-Wook Baek, Hyunil Kang, Wonseok Choi, Tae Ho Shin, Jun-Young Park, Jung Hyun Kim
Summary: This study investigated the phase synthesis and electrochemical properties of layered perovskites with Pr and Sm substitution at the A-site for cathode materials in Intermediate Temperature-Operating Solid Oxide Fuel Cells (IT-SOFC). Different compositions showed varying crystalline structures and conductivities, with Pr0.5Sm0.5Ba0.5Sr0.5Co2O5+d (PSBSCO55) exhibiting the lowest conductivity but the lowest Area-Specific Resistance (ASR) at 700 degrees C.
Article
Chemistry, Physical
John-In Lee, Ka-Young Park, Hyunyoung Park, Hohan Bae, Muhammad Saqib, Kwangho Park, Ji-Seop Shin, Minkyeong Jo, Jongsoon Kim, Sun-Ju Song, Eric D. Wachsman, Jun-Young Park
Summary: The use of highly defective material NBCFM in RPCCs' oxygen electrode achieves exceptional performance with high peak power densities and stability, helping to maximize the concentration of protons and oxygen vacancies.
JOURNAL OF POWER SOURCES
(2021)
Article
Chemistry, Physical
Atif Khan Niaz, Young Je Kim, Anil V. Virkar, Jun-Young Park, Hyung-Tae Lim
Summary: A bilayer composite electrolyte is designed to improve the stability of co-ionic conducting solid oxide fuel cells (SOFCs) in a cell imbalanced stack. Local electronic conduction is identified as a crucial factor for the durability of co-ionic SOFCs under negative voltage operation. The bilayer configuration is suggested as a practical solution to protect the cells in a cell-imbalanced stack.
JOURNAL OF POWER SOURCES
(2021)
Article
Electrochemistry
Ahmed Afif, Nikdalila Radenahmad, Seikh Mohammad Habibur Rahman, Nico Torino, Muhammad Saqib, Shahzad Hossain, Jun-Young Park, Abul Kalam Azad
Summary: Protonic ceramic fuel cells show high power output at intermediate temperature range, with electrolyte materials demonstrating high stability and conductivity. The new BCZYYbZn05 material exhibits high stability and conductivity, performing well at 700 degrees C.
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
(2022)
Article
Infectious Diseases
Seok-Chan Park, Jun Young Park, Jin Young Choi, Byungkwan Oh, Myeon-Sik Yang, Sook-Young Lee, Jong-Won Kim, Seong Kug Eo, Joon-Seok Chae, Chae Woong Lim, Jae-Ku Oem, Dong-Seob Tark, Bumseok Kim
Summary: Intramuscular inoculation with SFTSV induced minor clinical symptoms in dogs with immunocompetence, while immunosuppressed dogs showed high fever and weight loss. Thrombocytopenia was observed in immunocompromised SFTSV-infected dogs. Intraspecies SFTSV transmission in dogs was confirmed to occur by contact.
TRANSBOUNDARY AND EMERGING DISEASES
(2022)
Article
Chemistry, Physical
Sung Ryul Choi, Munwon Lim, Dong Yeong Kim, Won Young An, Sung Won Lee, Sungyong Choi, Suk Joo Bae, Sung-Dae Yim, Jun-Young Park
Summary: This study proposes a method to accurately predict the lifetime of membrane electrode assembly (MEA) through empirical modeling using accelerated degradation tests (ADTs). It addresses the potential bias in lifetime prediction caused by combined stressors in ADTs, and offers insights into resolving durability issues of MEAs.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Engineering, Environmental
Yeong Seon Oh, Minhyung Kim, Sung Kang, Jun-Young Park, Hyung-Tae Lim
Summary: This study investigates the effect of LPS redox activity on the chemo-mechanical stability of all-solid-state batteries. The results show that the batteries can be stably cycled when operated within the practical stability window, but exhibit unstable charging behaviors and voltage noise when operated beyond the stability window. This instability is attributed to the oxidative decomposition of LPS, which leads to cathode degradation, micro-short circuits, and capacity loss.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Physical
Dong Yeong Kim, Hyungwoo Lee, Sung Ryul Choi, Sungyong Choi, Won Young An, Hyun-Seok Cho, Minseok Choi, Jun-Young Park
Summary: This study presents a facile and reproducible synthesis process for hierarchically porous Ni3S2 arrays on nickel foam as a catalyst for oxygen evolution reaction (OER) in alkaline medium. The synthesized catalyst exhibits excellent OER performance, stable potential behavior, and durability.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Inorganic & Nuclear
Hohan Bae, In-Ho Kim, Hyun-Kuk Park, Jun-Young Park, Sun-Ju Song
Summary: This study measured the oxygen nonstoichiometry, electrical conductivity, and thermal expansion of misfit cobalt oxide at various temperatures and oxygen partial pressures. The results showed a positive deviation from the ideal defect structure, which can be accurately explained by the nonideal defect structure and degenerate holes.
JOURNAL OF SOLID STATE CHEMISTRY
(2022)
Article
Chemistry, Physical
Mi Young Park, Sun-Young Park, Haewon Seo, Jin-Mook Jung, Hyo Ki Hwang, Jongsup Hong, Jun-Young Park, Insung Lee, Kyung Joong Yoon
Summary: We developed a highly efficient, reliable, and cost-competitive cathode current collector using Cu-Mn foam. The foam offers adequate mechanical properties for stack assembly and transforms into a conductive spinel oxide during high-temperature operation, providing the desired electrical and structural characteristics. Our tests showed that the Cu-Mn foam was stable, performed comparably to a noble metal mesh, and demonstrated excellent durability in a 1 kW-class full-size stack.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
