Article
Chemistry, Inorganic & Nuclear
Tong Xia, Ying Liu, Meizhen Dai, Qing Xia, Xiang Wu
Summary: In this study, NiCo2S4 nanowire bundles were synthesized on a nickel foam via hydrothermal routes, which possess excellent specific surface area as an electrode material, shortening the diffusion channel of ions. The assembled asymmetric supercapacitor demonstrates high energy density and excellent mechanical stability even at different bending angles.
DALTON TRANSACTIONS
(2021)
Article
Chemistry, Physical
Hui Sun, Shiyu Chen, Wensheng Tian, Yuan Liu, Jie Chen, Mingming Chen, Dawei Cao
Summary: Researchers have developed a universal method to prepare free-standing hierarchical graphene-based composite electrodes, which can effectively distribute active materials, improve ion diffusion, and increase charge transfer, thus enhancing device performance.
JOURNAL OF POWER SOURCES
(2023)
Article
Chemistry, Multidisciplinary
Azusa Kamiyama, Kei Kubota, Daisuke Igarashi, Yong Youn, Yoshitaka Tateyama, Hideka Ando, Kazuma Gotoh, Shinichi Komaba
Summary: High-capacity hard carbon with a reversible capacity of 478 mAh g(-1) is successfully synthesized using MgO-template technique, with nanostructures and synthetic conditions optimized to maximize Na storage properties. Leaching of MgO and carbonization at high temperature result in a large reversible capacity and high Coulombic efficiency of 88% in the first cycle.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Analytical
Bala Krishnan Ganesan, Higgins M. Wilson, Sangho Park, Sang Joon Lee, Yun-Sung Lee
Summary: In recent years, hybrid capacitors have proven to be an efficient technology in energy storage by using a renewable source. This study demonstrates the use of diesel soot derived from automobile exhausts as a carbon source for hybrid capacitors. The activated diesel soot carbon shows significantly improved charge storing capabilities. The resulting hybrid capacitor with activated diesel soot carbon exhibits high charge storage capacity, rate performance, and cycle stability.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2023)
Article
Chemistry, Physical
Boya Sun, Ning Wang, Mingming Li, Yan Fang, Jiajun Gu, Wei Sun, Wang Zhang, Di Zhang, Qinglei Liu
Summary: This study reports an electrode framework matching strategy that improves the energy density and power density of lithium-ion capacitors (LICs) by optimizing the design and fabrication of the electrodes. The assembled LICs achieved high energy densities and power densities, surpassing previous LIC counterparts. This work provides important insights for the design and fabrication of high-performance LICs.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Hyun-Su Lim, Jung-Min Oh, Jong-Woong Kim
Summary: MXenes based on titanium carbide show promise as next-generation transparent electrode materials due to their high conductivity and optical transparency, and have gained popularity in flexible electrode materials. A continuous deposition technology was successfully developed to form high-quality MXene nanosheet-based transparent electrodes on both sides of a polymer film.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Analytical
Zhijie Chen, Zhiwei Li, Wenjie He, Yufeng An, Laifa Shen, Hui Dou, Xiaogang Zhang
Summary: By taking advantage of the unique features of Li4Ti5O12, this study evaluated the electrochemical performance of LTO MS using a lithium/sodium mixed organic solvent as electrolyte, effectively broadening its potential window and constructing a lithium/sodium mixed electrolyte system with high specific capacity, rate performance, and cycling stability. The charge storage mechanism was systematically analyzed, and a lithium-sodium hybrid ion capacitor was successfully constructed, providing high energy density, cycling stability, and low self-discharge rate.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2021)
Article
Nanoscience & Nanotechnology
Wenliang Feng, Venkata Sai Avvaru, Rudi Ruben Maca, Steven J. Hinder, Miguel Castillo Rodriguez, Vinodkumar Etacheri
Summary: A high energy density sodium-ion hybrid capacitor (SHC) based on a highly pseudocapacitive interface-engineered 3D-CoO-NrGO anode is reported, showcasing exceptional pseudocapacitive charge storage and capacity retention. The performance of the anode and SHC is attributed to the synergistic effect of CoO conversion reaction, pseudocapacitive sodium-ion storage, and efficient strain relaxation and charge-transfer facilitated by Co-O-C bonds and the 3D microstructure.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Review
Energy & Fuels
Yanzhi Cai, Yuhan Wang, Laifei Cheng, Siyu Guo, Tingting Liu, Zhongyi Hu, Haiming Yu, Dengpeng Chen, Yanjun Li, Hudie Yuan
Summary: This paper summarizes the application of carbon nanotubes (CNTs) in the field of flexible electrodes, including the use of CNTs as active materials growing in situ in other flexible substrates and as flexible skeletons to grow other active materials. The effects of composition and structure on the flexible electrode materials are discussed, and the design and assembly modes of different structures of flexible supercapacitors (FSCs) are introduced. In addition, the future development of CNT flexible electrodes and FSCs composed of CNT composite flexible electrodes is discussed.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Energy & Fuels
Debasish Mandal, Jong Yeob Jeong, Bal Sydulu Singu, Seojun Lee, Woo Jin Mun, Hansung Kim
Summary: In this study, a flexible solid-state lithium-ion hybrid capacitor (LIHC) enabled by a thin graphite-layer-coated adhesive tape-based flexible current collector is reported. The LIHC demonstrates high specific capacity, excellent cyclic stability, high capacitance, high energy density, and high power density, making it suitable for use in smart flexible electronic devices.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Chemistry, Physical
Gudla Vardhini, Shruti Suriyakumar, Manikoth M. Shaijumon
Summary: The fabrication of an all-organic potassium ion hybrid capacitor (KIHC) using dipotassium terephthalate (K2TP) as the anode and polyaniline (PANi) as the cathode demonstrated excellent electrochemical properties with high energy and power densities, as well as good cycle stability. This provides promising prospects for building sustainable and eco-friendly energy storage economy.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Vishnu Surendran, Ashique Lal, Manikoth M. Shaijumon
Summary: Hybrid ion capacitors (HICs) combine the advantages of batteries and supercapacitors, but achieving optimal mass balancing for full-cell HIC devices is challenging due to differences in specific capacities and rate capabilities of electrodes. A method to predict well-performing mass ratios for Na-HIC electrodes has been demonstrated, using a Ragone Plot Simulator to predict specific energy and power. The approach, validated using experimental data, serves as a design tool for selecting optimized HIC devices for various applications.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Physical
Feng Wei, Huadong Tian, Pengmei Chen, Yaohui Lv, Jiarui Huang
Summary: Carbonaceous zinc ion hybrid capacitors (CZHCs) have gained considerable attention due to their high energy density from zinc-ion batteries and the excellent safety and high power density from supercapacitors. However, the complex preparation process for the carbon cathode necessitates the development of a simple and efficient method. This study demonstrates the synthesis of porous carbon nanosheets (C-Xs) through a dual-template strategy and K2CO3 activation of anthracene molecules, resulting in layered sheet-like structures with high surface area. The Zn-C-Xs ZHC cathode exhibits outstanding zinc storage properties, achieving a discharge capacity of 121.7 mAh g(-1), maximum energy density of 109.3 Wh kg(-1), and power density of 15.6 kW kg(-1) in a 3M ZnSO4 electrolyte. After 30,000 cycles, it maintains a capacity retention of 96.2% and a coulombic efficiency close to 100%. This work presents a simple and efficient route for the synthesis of carbon nanosheet cathodes using a dual-template strategy for ZHCs.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Physical
Yingying Wang, Yifang Ding, Jiawen Gao, Xin Zhang, Hongtao Sun, Gongkai Wang
Summary: In this study, a microwave irradiation technology was developed for the in-situ growth of nano-sized Bi uniformly anchored on the surface of carbon nanotubes (CNTs). The as-synthesized freestanding electrode film effectively retards the pulverization of Bi nanoparticles, enabling fast sodium storage kinetics for high-power performance and high-capacity retention.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Materials Science, Ceramics
Fanfan Hu, Ying Lin, Yun Qiu, Bo Wen, Yanan Zheng, Haibo Yang
Summary: Nitrogen-doped mesoporous hollow carbon microcages (N-MHCC) were successfully prepared by combining hard and soft template method. The hierarchically porous structure of N-MHCC provides a large number of active centers, promoting rapid diffusion and electrolyte ions transport. The high specific capacitance and cycle retention rate of N-MHCC make it a promising candidate for high performance supercapacitors.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Physical
N. S. M. Viswanath, Mu-Huai Fang, Ha Tran Huu, Joo Hyeong Han, Ru-Shi Liu, Won Bin Im
Summary: This study demonstrates the tuning of thermal stability from negative thermal quenching to zero thermal quenching while preserving the original emission efficiency by introducing Lu3+ ions in Na3Sc2(PO4)(3):Eu2+. By utilizing optimized Lu3+-doped Na3Sc2(PO4)3:Eu2+ as the blue component, a high-power white light-emitting diode with high color-rendering index and luminous efficiency values was successfully fabricated. These findings emphasize the importance of structure-property relationships in designing thermally stable phosphors for high-power lighting applications.
CHEMISTRY OF MATERIALS
(2022)
Article
Energy & Fuels
Ha Tran Huu, Hang T. T. Le, Thanh Huong Nguyen, Lan Nguyen Thi, Vien Vo, Won Bin Im
Summary: In this study, SnS2 nanosheets were synthesized and grafted onto porous g-C3N4 as an anode active material for sodium-ion batteries. The composites showed outstanding performance in terms of high capacity and ultralong cycling stability, attributed to the presence of g-C3N4 relieving strains induced by volume variation of SnS2 and enhanced transport of electrons and sodium ions.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Materials Science, Ceramics
Yoon Sung Jung, Kyung Won Min, Jae Ho Choi, Ji Sob Yoon, Won Bin Im, Hyeong-Jun Kim
Summary: The etch rate of CAS glass layers increased with increasing temperature and duration, leading to reduced plasma resistance as well as increased crystallization of the glass layers.
JOURNAL OF THE KOREAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Multidisciplinary
Ha Jun Kim, Sangyoon Ji, Ju Yeon Han, Han Bin Cho, Young-Geun Park, Dongwhi Choi, Hoonsung Cho, Jang-Ung Park, Won Bin Im
Summary: Cracked tooth syndrome (CTS) is a common incomplete fracture of human teeth caused by chewing hard foods, and it is often difficult to diagnose accurately using conventional techniques. A novel method using mechanoluminescence phenomenon and phosphor particles has been developed for in vivo detection of tooth microcracks, providing high-resolution imaging of cracks through a stretchable and self-healable photodetector array. This technique utilizes a simple optical phenomenon to obtain precise information about the locations, depth, and length of tooth cracks, distinguishing it from traditional methods.
NPG ASIA MATERIALS
(2022)
Article
Environmental Sciences
Byeong-Hyeon An, Tae-Gyu Lee, Tamal Tahsin Khan, Hye-Won Seo, Hyun Jin Hwang, Young -Si Jun
Summary: In this study, a simple and selective optical detection of high-concentrated Co2+ using a graphitic carbon nitride (g-CN)-based fluorescent chemosensor is reported. The fluorescent sensing performance of CNIs is evaluated through photoluminescence (PL) emission spectroscopy in a broad Co2+ concentration range. This study provides the design principle of the chemosensor suitable for the fast and accurate optical detection of Co2+ present in a broad concentration range for the hydrometallurgy of recycling waste LIBs.
Article
Chemistry, Multidisciplinary
Changhee Jang, Kangyong Kim, Hak-Won Nho, Seung Min Lee, Hanif Mubarok, Joo Hyeong Han, Hyeonjung Kim, Dongryeol Lee, Yangpil Jang, Min Hyung Lee, Oh-Hoon Kwon, Sang Kyu Kwak, Won Bin Im, Myoung Hoon Song, Jongnam Park
Summary: This article presents an optimized colloidal process for synthesizing uniform Cs5Cu3Cl6I2 nanocrystals with a superior quantum yield. Precise control of the synthesis parameters enables anisotropic growth and emission wavelength shifting. The synthesized nanocrystals exhibit excellent photoluminescence retention rate at high temperature and high stability under ambient conditions. Moreover, they demonstrate three-photon absorption-induced photoluminescence, indicating their potential for nonlinear optical applications. These thermally stable and highly luminescent nanocrystals overcome the limitations of conventional blue-emitting nanomaterials and provide insights into their colloidal synthesis mechanism.
Article
Materials Science, Multidisciplinary
Jinju Lee, Hansol Lee, Usik Kim, Woon Jin Chung, Won Bin Im
Summary: A remote color converter was fabricated using CsPbBr3 perovskite nanocrystal embedded glass (PNEG) as a green phosphor in a silicone (PiS) structure. The PNEG, when pasted on a glass substrate and mounted on a blue LED, exhibited enhanced thermal and photo stability compared to bulk PNEG. A white LED with a wide color gamut of up to 130% of the NTSC defined area was prepared using the remote color converter and K2SiF6:Mn4+ (KSF:Mn4+) as a red phosphor. The feasibility of a flexible remote white color converter using ultra-thin glass (UTG) as a substrate was also examined and discussed.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Chemistry, Multidisciplinary
Gazi A. K. M. Rafiqul Bari, Hui-Ju Kang, Tae-Gyu Lee, Hyun Jin Hwang, Byeong-Hyeon An, Hye-Won Seo, Chang Hyun Ko, Won Hi Hong, Young-Si Jun
Summary: A dual-templating strategy using molten salts and hydrogen-bonded triazine molecules has been developed to prepare high-performance porous carbon adsorbents for CO2 capture. This strategy allows for the control of pore structure and hetero-atom insertion, resulting in improved CO2 capture performance.
Article
Chemistry, Physical
Joo Hyeong Han, Tuhin Samanta, Yong Min Park, Ha Jun Kim, Noolu Srinivasa Manikanta Viswanath, Hyeon Woo Kim, Bo Kyung Cha, Sung Beom Cho, Won Bin Im
Summary: We developed zero-dimensional lead-free monoclinic phases of Cs3TbCl6 and Rb3TbCl6 metal halides that are thermally and chemically stable. These materials exhibit high light yields and low detection limits, making them suitable for radiation detection in extreme environments. Thin films of Cs3TbCl6 and Rb3TbCl6 also show improved spatial resolutions compared to a commercial Gd2O2S:Tb3+ film in our X-ray imaging system.
ACS ENERGY LETTERS
(2023)
Article
Engineering, Chemical
Kyung Won Min, Jae Ho Choi, YoonSung Jung, Young Min Byun, Won Bin Im, Hyeong-Jun Kim
Summary: This study investigated the effects of heat-treatment temperature and hot-end coating on the mechanical properties and reliability of lightweight glass bottles. Chemical strengthening at the glass transformation temperature significantly improved the hardness and impact strength of the bottles. The use of hot-end coating reduced the distribution of impact strength and increased the Weibull modulus values, enhancing the reliability of the bottles after chemical strengthening.
Article
Nanoscience & Nanotechnology
Han Bin Cho, Ju Yeon Han, Ha Jun Kim, Noolu Srinivasa Manikanta Viswanath, Yong Min Park, Jeong Wan Min, Sung Woo Jang, Heesun Yang, Won Bin Im
Summary: Quantum dot light-emitting diodes (QLEDs) are promising for display applications. Polyethylenedioxythiophene:polystyrene sulfonate (PEDOT:PSS) is commonly used as a hole injection layer (HIL) material due to its high conductivity and work function. However, PEDOT:PSS-based QLEDs have a high energy barrier for hole injection, resulting in low device efficiency. Here, we demonstrate a bilayer-HIL using VO2 and a PEDOT:PSS-based QLED, which shows an 18% external quantum efficiency (EQE), 78 cd/A current efficiency (CE), and 25,771 cd/m(2) maximum luminance. This is compared to the PEDOT:PSS-based QLED with an EQE of 13%, CE of 54 cd/A, and maximum luminance of 14,817 cd/m(2). The increase in EQE is attributed to the reduction in the energy barrier between indium tin oxide (ITO) and PEDOT:PSS by the insertion of a VO(2) HIL. Therefore, our results demonstrate the effectiveness of a bilayer-HIL in increasing the EQE in QLEDs.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Materials Science, Multidisciplinary
Tuhin Samanta, Noolu Srinivasa Manikanta Viswanath, Sung Woo Jang, Jeong Wan Min, Han Bin Cho, Joo Hyeong Han, Won Bin Im
Summary: Researchers report zero-dimensional Cs3ScCl6:Sb3+(CSC:Sb3+) nanocrystals that exhibit bright white-light emission, achieved through the combination of blue and yellow emissions of carbon dots and spin-forbidden electronic transitions of Sb3+ ions. These nanocrystals have a high photoluminescence quantum yield and high thermal stability, and can be used to fabricate single-component white-light-emitting diodes.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Joo Hyeong Han, Tuhin Samanta, Han Bin Cho, Sung Woo Jang, N. S. M. Viswanath, Yu Ri Kim, Jeong Min Seo, Won Bin Im
Summary: This study presents a new Cs3GdCl6 0D metal halide material that shows high hydrochromic upconversion luminescence (UCL) in the form of polycrystals and nanocrystals. The hydrochromic UCL color change from green to red is achieved through co-doping Yb3+ and Er3+ in polycrystals. The water-sensing probe based on this material exhibits excellent repeatability and is suitable for real-time and long-term water monitoring. Moreover, the hydrochromic UCL property is also utilized for stimuli-responsive information encryption.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Physical
Hyeon Woo Kim, Joo Hyeong Han, Hyunseok Ko, Tuhin Samanta, Dong Geon Lee, Dong Won Jeon, Woongchan Kim, Yong-Chae Chung, Won Bin Im, Sung Beom Cho
Summary: Exploring the vast and veiled chemical spaces through synthesis is crucial in solid-state materials. This study focuses on navigating metal halides, particularly the coexistence of perovskites and their derivatives, which has restricted their exploration. By combining high-throughput density functional theory calculations and machine learning, the researchers systematically explore inorganic halide perovskite derivatives, charting the chemical spaces and predicting their electrical properties and thermal stability. The successful synthesis of new Cs3LuCl6 and its application in white-light-emitting diodes showcase the potential practical applications of inorganic metal halides.
ACS ENERGY LETTERS
(2023)
Article
Chemistry, Physical
Zhongkai Yu, Woo Hyeon Jeong, Keehoon Kang, Hochan Song, Xinyu Shen, Hyungju Ahn, Seok Woo Lee, Xiangyang Fan, Ji Won Jang, Su Ryong Ha, Jeong Wan Min, Jong Hyun Park, Jongmin Han, Eui Dae Jung, Myoung Hoon Song, Dong Wook Chang, Won Bin Im, Sung Heum Park, Hyosung Choi, Bo Ram Lee
Summary: Metal halide based perovskite light-emitting diodes (PeLEDs) show great promise for future commercial display products, but the performance of blue PeLEDs falls short of commercial requirements. This study developed a polymer/small-molecule binary-blend hole transport layer (HTL) to address the charge balance issue and achieve efficient light emission.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)