Article
Chemistry, Physical
Haixiang Han, Shantanu Kallakuri, Yuan Yao, Curtis B. Williamson, Douglas R. Nevers, Benjamin H. Savitzky, Rachael S. Skye, Mengyu Xu, Oleksandr Voznyy, Julia Dshemuchadse, Lena F. Kourkoutis, Steven J. Weinstein, Tobias Hanrath, Richard D. Robinson
Summary: This study demonstrates the spontaneous hierarchical self-organization of nanometre-scale subunits to form higher-level complex structures. By using monodisperse Cd37S18 magic-size cluster building blocks, highly aligned structures are obtained, which mimic the complex constructions seen in nature. This research provides a platform for the design of synthetically directed advanced materials with sophisticated functions.
Article
Materials Science, Multidisciplinary
Wenlong Huo, Elena Tervoort, Silvan Gantenbein, Etienne Jeoffroy, Jinlong Yang, Andre R. Studart
Summary: This study reports a cost-effective and simple process to create strong, highly porous ceramics via direct ink writing of suspensions of hollow microspheres into cellular architectures with pores at three hierarchical levels. X-ray diffraction, rheological measurements, scanning electron microscopy, and mechanical tests are conducted to thoroughly study the processing steps and morphology of the printed hierarchical porous ceramics. The presence of pores at multiple length scales significantly increases the mechanical strength of the porous structure, providing a useful platform for the manufacturing of lightweight ceramics from inexpensive and widely available feedstock materials.
ADVANCED MATERIALS TECHNOLOGIES
(2023)
Article
Mechanics
Si Suo, Yixiang Gan
Summary: In this study, a possible adjustment in pore geometry was reported to suppress capillary fingering and transition displacement patterns from fingering to compact mode in porous media with hierarchical structures. The results demonstrate that a higher porosity of the second-order porous structure can maintain compact displacement across a wider range of wettability conditions. This work provides insights into fluid-fluid displacement control in hierarchical porous media and can benefit the design of microfluidic devices for better fluid displacement efficiency at the field scale.
Article
Engineering, Manufacturing
Binling Chen, Richard Davies, Hong Chang, Yongde Xia, Yanqiu Zhu, Oana Ghita
Summary: This study demonstrates the use of in-situ synthesised MOF-polymer nanocomposite materials for laser-sintered parts with enhanced CO2 adsorption properties. By combining PA12 with nanofiller ZIF-67 crystals, a nanocomposite powder with good dispersion and maximum exposure of ZIF-67 nano-porous sites was fabricated. Laser sintering was employed to create porous structures with increased surface area, leading to improved CO2 capacity.
ADDITIVE MANUFACTURING
(2021)
Article
Agricultural Engineering
Shuang Liu, Shubin Wu, Hao Cheng, Wenguang Wei, Fengshan Zhang
Summary: Hierarchical porous carbon spheres with interconnected macro-meso-microporous structure were synthesized from sodium lignosulfonate by simple spray drying and carbonization-activation. The as-prepared carbon spheres exhibited high specific surface area and large pore volume, and showed excellent adsorption capacity and capacitive performance.
INDUSTRIAL CROPS AND PRODUCTS
(2022)
Article
Chemistry, Physical
David Werner, Johanna Maier, Nils Kaube, Vinzenz Geske, Thomas Behnisch, Matthias Ahlhelm, Tassilo Moritz, Alexander Michaelis, Maik Gude
Summary: Freeze foaming is a method for producing cellular ceramic scaffolds with a hierarchical porous structure. The study investigated the formation of macrostructure and microstructure separately, depending on the suspension composition and pressure reduction rate. The foaming behavior was characterized using in-situ radiographical and CT evaluation, showing potential for tuning the macro- and microstructure with different porosities.
Article
Chemistry, Multidisciplinary
Xiaoyan Wang, Yang Fei, Jie Chen, Yixiang Pan, Weiyong Yuan, Lian Ying Zhang, Chun Xian Guo, Chang Ming Li
Summary: The 3D nanostructured catalyst synthesized via directional-freezing-assisted in situ self-assembly exhibits superior catalytic activity in both acidic and alkaline media, surpassing most reported non-noble-metal-based hydrogen evolution reaction (HER) catalysts, and can be further optimized to become one of the best.
Article
Energy & Fuels
Z. H. Xie, Y. H. Lin, W. Lv, Y. F. Yuan, Y. Z. Huang, S. Y. Guo
Summary: Hierarchical porous honeycomb microspheres assembled by MoS2 nanocrystals-embedded carbon nanosheets show excellent lithium storage performance in high-performance lithium-ion batteries, with high specific capacity, stable long-term cycling performance, and fast Li+ diffusion.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Environmental Sciences
Xiaoxia Ren, Changming Zhang, Lifang Kou, Rongxian Wang, Yaqi Wang, Rui Li
Summary: The design of porous carbon adsorbents with high CO2 capture performance is crucial for addressing global warming and climate change. Activated carbon spheres prepared from specific methods showed excellent CO2 adsorption capacity and stability.
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
(2022)
Article
Chemistry, Physical
Elizaveta Anastasova, Anastasia A. Belyaeva, Sergey A. Tsymbal, Denis A. Vinnik, Vladimir V. Vinogradov
Summary: This study develops a stable magnetite hydrosol and successfully synthesizes materials with different structures by controlling the concentrations and drying conditions. The effects are theoretically explained and the synthesized materials show excellent biocompatibility and hemostatic potential.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Materials Science, Ceramics
Shuyi Feng, Jing Chen, Lin Ma, Jinfei Wu, Jiawen Lin, Lusheng Liao, Xiangyi Lu, Xiuli Yana, Shiwen Zeng, Yanjie Xi
Summary: In this study, a hierarchical porous nanostructured composite composed of VS2 nanoparticles confined in gelatin-derived nitrogen-doped carbon network (VS2-NC) was successfully designed and synthesized. The VS2-NC composite exhibits advantages such as high active surface areas, inhibition of volume change, reinforcement of structural stability, and improvement of overall electrical conductivity. It shows outstanding electrochemical performances as an anode for lithium-ion battery and as an electrode for supercapacitor.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
Mengdi Yuan, Jia An, Guoxiu Zhang, Yongqin Hu, Mengfei Luo, Yuxia Shi, Yufei Liu
Summary: In this study, novel nitrogen-doped carbon dots nanoparticles were successfully fabricated for rapid detection of tetracycline. The experimental results showed a good linear relationship and detection range of the method. In practical applications, the method exhibited a high average recovery rate for TET detection in dairy products.
CERAMICS INTERNATIONAL
(2022)
Article
Metallurgy & Metallurgical Engineering
Yan Feng, Cai-yu Cao, Jing Zheng, Ri-chu Wang, Chao-qun Peng, Xiao-feng Wang
Summary: In this study, hierarchical porous Co3O4 spheres were synthesized and the structure and performance of the spheres were investigated. The Co3O4-700 spheres exhibited excellent cycling performance with high reversible discharge and charge specific capacities.
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
(2022)
Article
Chemistry, Physical
Qian Xiao, Qilin Song, Ke Zheng, Li Zheng, Yanyan Zhu, Zhonghui Chen
Summary: A multidimensional porous anode was designed for sodium ion batteries, showing significant breakthroughs in sodium ion storage performance with high reversible capacity and superior long-term cycling performance. This electrode design strategy based on multidimensional nanoarchitecture sets a new benchmark for high-performance energy storage devices.
Article
Materials Science, Multidisciplinary
Ewelina Mackiewicz, Tomasz Wejrzanowski, Remigiusz Nowacki, Jakub Jaroszewicz, Jakub Marchewka, Lukasz Wilk, Patryk Bezkosty, Maciej Sitarz
Summary: Material extrusion is a commonly used 3D printing technique, particularly for ceramics as support materials. This article demonstrates the development of silica-nickel porous structures via material extrusion and the optimization of thermal processing conditions. It shows the potential application of material extrusion as a technique for printing highly porous materials with well-preserved 3D geometry.
APPLIED MATERIALS TODAY
(2023)
Article
Chemistry, Multidisciplinary
Xiaodong Shao, Mengfang Liang, Min Gyu Kim, Sara Ajmal, Ashwani Kumar, Xinghui Liu, Hyun Seung Jung, Haiyan Jin, Fengliang Cao, Jianmin Yu, Kim My Tran, Hyun Ko, Jinsun Lee, Jong Wook Bae, Hyoyoung Lee
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Byung-wook Park, Jincheol Kim, Tae Joo Shin, Yung Sam Kim, Min Gyu Kim, Sang Il Seok
Summary: This study reports an approach and mechanism for minimizing proton defects in alkylammonium lead trihalide perovskite (ALHP) crystals by adding ionized halides to the perovskite precursor solution. The researchers found that the ionized halides induced proton transfer from H2O to the alkylammonium cation in the precursor solution, stabilizing the ALHP crystals. By examining the fundamental characteristics of ALHP and its precursors, the findings from this work will guide the development of highly stable ALHP crystals, enabling efficient and stable optoelectronic ALHP devices.
ADVANCED MATERIALS
(2023)
Article
Energy & Fuels
Dong Wook Kim, Beum Jin Park, Youngkwon Kim, Ho Seok Park
Summary: In this study, hierarchically structured Cr-doped NiCo-layered double hydroxides (LDHs) nanoplates chemically grown on the surface of nitrogen-doped reduced graphene oxide nanosheets (NiCoCr LDH/N-rGO) were reported for bifunctional electrocatalysts of RZABs. The electrocatalytic activity and kinetics of NiCoCr LDH/N-rGO for both ORR and OER were greatly improved due to Cr doping, resulting in lower overpotential and better Tafel's slope. As a result, the RZAB with NiCoCr LDH/N-rGO catalyst exhibited higher power density and better cycling stability compared to Pt/C+RuO2.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2023)
Article
Nanoscience & Nanotechnology
Ho Seok Park, Hwi Jung Kim, Jeong Seok Yeon, Hye Rin Park, Sang Joon Lee, Won Il Kim, Gun Jang
Summary: Recently, the abnormal charge storage mechanism of intercalation pseudocapacitance has attracted significant interest. This study demonstrates the fast and reversible intercalation pseudocapacitance of vanadium-substituted Keggin-type molybdenum-based polyoxometalates (XPMoV) and the support effect of cation exchange on morphological evolution and improved chemical and structural integrity. This research paves the way for the design of fast and reversible intercalation pseudocapacitance of polyoxometalates and the improvement of (electro)chemical and structural integrity through cation exchange chemistry.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Nanoscience & Nanotechnology
Hyeonjeong Lee, Woonghee Choi, Ho Seok Park, Dong Wook Kim
Summary: In this paper, carbon nanofiber (CNF) was introduced as a conductive additive, and the porosity of the electrode was optimized by calendering to achieve a high loading density lithium polymer battery (LPB). A simple dispersion strategy was used to homogeneously disperse nanofiber additives in the electrode, resulting in high electronic conductivity. Calendering with optimized pressing degree improved lithium-ion transport and electron conduction in the LPB. The optimized pressing conditions achieved optimum electrode wettability and contact, leading to high performance of the LPB. Finally, at the optimized pressing degree, 90% cycle retention during 100 cycles and over seven-fold improvement in volumetric energy density were successfully demonstrated.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Linhan Jian, Ming Li, Xinghui Liu, Guowen Wang, Xinxin Zhang, Min Gyu Kim, Yinghuan Fu, Hongchao Ma
Summary: In this study, a hierarchical dendritic Co3O4-SnO2 heterostructure was prepared via a sequential hydrothermal process for treating refractory organics. The size of the ultrathin SnO2 nanosheets can be controlled by the time of the secondary hydrothermal process. Ti/Co3O4-SnO2-168h showed a photoelectrocatalysis degradation rate of approximately 93.3% for a high dye concentrate, with good long-term cyclability and durability. The proposed type-II heterojunction between Co3O4 and SnO2 prevents carrier recombination and enhances the generation of active species.
Article
Multidisciplinary Sciences
Jaewang Park, Jongbeom Kim, Hyun-Sung Yun, Min Jae Paik, Eunseo Noh, Hyun Jung Mun, Min Gyu Kim, Tae Joo Shin, Sang Il Seok
Summary: Controlling the crystallinity and surface morphology of perovskite layers is crucial for achieving high-efficiency perovskite solar cells. By adding alkylammonium chlorides (RACl) to a-formamidinium lead iodide (FAPbI(3)), the crystallization process and surface morphology of the perovskite thin films can be controlled. The resulting perovskite thin layers facilitate the fabrication of perovskite solar cells with a high power-conversion efficiency of 26.08%.
Article
Chemistry, Physical
Yoonbin Kim, Won Il Kim, Hyunyoung Park, Jun Su Kim, Hyungyu Cho, Jeong Seok Yeon, Jongsoon Kim, Young-Jun Kim, Jeongyeon Lee, Ho Seok Park
Summary: In this study, a multifunctional polymeric cobalt phthalocyanine (TCP) material was designed and applied in lithium-sulfur batteries, showing promising performance. The TCP coating on multiwalled carbon nanotubes exhibited cooperative redox mediating and lithiophilic effects, leading to improved conversion reaction kinetics of S cathodes, enhanced utilization efficiency of S, and inhibition of polysulfide shuttling. As a result, the S@TCP/MC cathode achieved high discharge capacity, high-rate capacity, high capacity retention, and high areal capacity.
ADVANCED ENERGY MATERIALS
(2023)
Article
Chemistry, Physical
Liqiang Hou, Zijian Li, Haeseong Jang, Yu Wang, Xuemei Cui, Xiumin Gu, Min Gyu Kim, Ligang Feng, Shangguo Liu, Xien Liu
Summary: A rutile-structured ruthenium-zinc solid solution oxide with oxygen vacancies (Ru0.85Zn0.15O2-delta) is developed by a simple molten salt method. It exhibits ultralow overpotentials for both oxygen evolution reaction (OER) and hydrogen evolution reaction (HER), and shows superior activity and durability for overall water splitting in different electrolytes.
ADVANCED ENERGY MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Yanhong Li, Lei Zhang, Hung-Yu Yen, Yucun Zhou, Gun Jang, Songliu Yuan, Jeng-Han Wang, Peixun Xiong, Meilin Liu, Ho Seok Park, Wenwu Li
Summary: This study successfully introduced liquid metallic Ga and highly reactive P into Si to create a cation-mixed disordered lattice and a unique Li storage mechanism. The resulting GaSiP2 electrodes showed high specific capacity and initial Coulombic efficiency, while the graphite-modified GaSiP2 achieved excellent capacity retention and high-rate capacity. The full cells using GaSiP2@C as anode material also exhibited high specific capacity after cycles, demonstrating the potential of GaSiP2 for high-performance LIBs.
NANO-MICRO LETTERS
(2023)
Article
Chemistry, Physical
Peixun Xiong, Yingbo Kang, Nan Yao, Xiang Chen, Haiyan Mao, Woo-Sung Jang, David M. Halat, Zhong-Heng Fu, Min-Hyoung Jung, Hu Young Jeong, Young-Min Kim, Jeffrey A. Reimer, Qiang Zhang, Ho Seok Park
Summary: A stable Zn5(CO3)2(OH)6 solid electrolyte interphase (SEI) was formed on the surface of Zn anodes using hybrid electrolytes, resulting in dendrite-free Zn plating/stripping. The Zn5(OH)6(CO3)2-contained SEI exhibited high ionic conductivity and fast Zn2+ migration, enabling the development of stable Zn-ion hybrid capacitors with high performance at various temperatures. The hybrid capacitors showed excellent capacity retention and Coulombic efficiency over a large number of cycles.
ACS ENERGY LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Kang Ho Shin, Donghwan Ji, Jae Min Park, Yun Sang Joe, Ho Seok Park, Jaeyun Kim
Summary: In this study, a structural composite hydrogel electrolyte with high mechanical strength, thermal stability, and the ability to operate in extreme conditions is designed for Zn metal batteries. The electrolyte exhibits high energy densities and uniform Zn deposition, as well as stable performance under mechanical stress and even in boiling and freezing water.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Engineering, Environmental
Sang Ha Baek, Jin Suk Byun, Hwi Jung Kim, Sang Joon Lee, Jae Min Park, Peixun Xiong, Yongchul G. Chung, Ho Seok Park
Summary: An organic-inorganic hybrid layer composed of polyoxometalate (POM) and poly(ethylene glycol) dimethyl ether (PEGDME) was demonstrated on the Zn metal surface to improve the reversibility and stability of Zn metal anodes. The POM-PEGDME-coated Zn metal anode achieved a high capacity retention in a battery cell paired with a β-MnO2 cathode, showing the potential of designing synergized organic-inorganic hybrid artificial layers for metal anode protection.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Multidisciplinary
Won Il Kim, Jeong Seok Yeon, Hyunyoung Park, Hwi Jung Kim, Min Ju Kim, Jongsoon Kim, Ho Seok Park
Summary: A new cathode material, N,P-rGO/h-MoO2@S, has been developed to address the issues of lithium-sulfur batteries, improving their discharge capacity and cycling stability.
COMPOSITES PART B-ENGINEERING
(2023)
Article
Chemistry, Physical
Hun Seok Choi, Young Hwan Kim, Seong-Min Bak, Kwang-Bum Kim
Summary: Metal phosphides show promise as anode materials for high-energy potassium-ion batteries, but their cycling performance is hindered by volume changes. This study explores the synthesis strategies of CoP/porous carbon composites using bimetallic and monometallic-zeolitic imidazolate framework (ZIF) and achieves uniform embedding of CoP nanoparticles in porous carbon using a bimetallic Co/Zn ZIF. The resulting composite exhibits high specific capacity and cycling stability for potassium-ion storage, showcasing the potential of bimetallic ZIF for high-performance battery materials.
APPLIED SURFACE SCIENCE
(2024)
