The Experts below are selected from a list of 17376 Experts worldwide ranked by ideXlab platform
Tetsuichi Kudo - One of the best experts on this subject based on the ideXlab platform.
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electric double layer capacitance on hierarchical porous carbons in an organic electrolyte
Journal of Power Sources, 2008Co-Authors: Hirotoshi Yamada, Isamu Moriguchi, Tetsuichi KudoAbstract:Abstract Nanoporous carbons were prepared by using colloidal crystal as a template. Nitrogen adsorption/desorption isotherms and transmission electron microscope images revealed that the porous carbons exhibit hierarchical porous structures with meso/macropores and Micropores. Electric double layer capacitor performance of the porous carbons was investigated in an organic electrolyte of 1 M LiClO 4 in propylene carbonate and dimethoxy ethane. The hierarchical porous carbons exhibited large specific double layer capacitance of ca. 120 F g −1 due to their large surface areas. In addition, the large capacitance was still obtained at a large current density up to 10 A g −1 , which satisfies demands from the high power application such as hybrid electric vehicles. Capacitance analysis of the hierarchical porous structures revealed the contribution of meso/macropores and micropore to the electric double layer capacitance to be 8.4 and 8.1 μF cm −2 , respectively. The results indicated electric double layer is formed even when solvated ions are larger than pore diameters.
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colloidal crystal templated porous carbon as a high performance electrical double layer capacitor material
Electrochemical and Solid State Letters, 2004Co-Authors: Isamu Moriguchi, Fumihiro Nakahara, Hirotoshi Yamada, Hiroshi Furukawa, Tetsuichi KudoAbstract:Bimodal porous carbons with both Micropores and meso- or macropores were selectively synthesized by an SiO 2 colloidal crystal-templating process. The SiO 2 opal templates exclusively contributed to the formation of meso-and macropores in carbons. The electrical double-layer capacitance per surface area of the templated porous carbons was much larger than those of commercially available activated carbons with high surface areas. The surface of meso- and macropores generated in the porous carbons shows a highly efficient electrical double-layer capacitive property; the specific capacitance per surface area originating from meso- and/or macropores was estimated to be 20 ′ 2 μF cm - 2 .
Isamu Moriguchi - One of the best experts on this subject based on the ideXlab platform.
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electric double layer capacitance on hierarchical porous carbons in an organic electrolyte
Journal of Power Sources, 2008Co-Authors: Hirotoshi Yamada, Isamu Moriguchi, Tetsuichi KudoAbstract:Abstract Nanoporous carbons were prepared by using colloidal crystal as a template. Nitrogen adsorption/desorption isotherms and transmission electron microscope images revealed that the porous carbons exhibit hierarchical porous structures with meso/macropores and Micropores. Electric double layer capacitor performance of the porous carbons was investigated in an organic electrolyte of 1 M LiClO 4 in propylene carbonate and dimethoxy ethane. The hierarchical porous carbons exhibited large specific double layer capacitance of ca. 120 F g −1 due to their large surface areas. In addition, the large capacitance was still obtained at a large current density up to 10 A g −1 , which satisfies demands from the high power application such as hybrid electric vehicles. Capacitance analysis of the hierarchical porous structures revealed the contribution of meso/macropores and micropore to the electric double layer capacitance to be 8.4 and 8.1 μF cm −2 , respectively. The results indicated electric double layer is formed even when solvated ions are larger than pore diameters.
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colloidal crystal templated porous carbon as a high performance electrical double layer capacitor material
Electrochemical and Solid State Letters, 2004Co-Authors: Isamu Moriguchi, Fumihiro Nakahara, Hirotoshi Yamada, Hiroshi Furukawa, Tetsuichi KudoAbstract:Bimodal porous carbons with both Micropores and meso- or macropores were selectively synthesized by an SiO 2 colloidal crystal-templating process. The SiO 2 opal templates exclusively contributed to the formation of meso-and macropores in carbons. The electrical double-layer capacitance per surface area of the templated porous carbons was much larger than those of commercially available activated carbons with high surface areas. The surface of meso- and macropores generated in the porous carbons shows a highly efficient electrical double-layer capacitive property; the specific capacitance per surface area originating from meso- and/or macropores was estimated to be 20 ′ 2 μF cm - 2 .
Hirotoshi Yamada - One of the best experts on this subject based on the ideXlab platform.
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electric double layer capacitance on hierarchical porous carbons in an organic electrolyte
Journal of Power Sources, 2008Co-Authors: Hirotoshi Yamada, Isamu Moriguchi, Tetsuichi KudoAbstract:Abstract Nanoporous carbons were prepared by using colloidal crystal as a template. Nitrogen adsorption/desorption isotherms and transmission electron microscope images revealed that the porous carbons exhibit hierarchical porous structures with meso/macropores and Micropores. Electric double layer capacitor performance of the porous carbons was investigated in an organic electrolyte of 1 M LiClO 4 in propylene carbonate and dimethoxy ethane. The hierarchical porous carbons exhibited large specific double layer capacitance of ca. 120 F g −1 due to their large surface areas. In addition, the large capacitance was still obtained at a large current density up to 10 A g −1 , which satisfies demands from the high power application such as hybrid electric vehicles. Capacitance analysis of the hierarchical porous structures revealed the contribution of meso/macropores and micropore to the electric double layer capacitance to be 8.4 and 8.1 μF cm −2 , respectively. The results indicated electric double layer is formed even when solvated ions are larger than pore diameters.
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colloidal crystal templated porous carbon as a high performance electrical double layer capacitor material
Electrochemical and Solid State Letters, 2004Co-Authors: Isamu Moriguchi, Fumihiro Nakahara, Hirotoshi Yamada, Hiroshi Furukawa, Tetsuichi KudoAbstract:Bimodal porous carbons with both Micropores and meso- or macropores were selectively synthesized by an SiO 2 colloidal crystal-templating process. The SiO 2 opal templates exclusively contributed to the formation of meso-and macropores in carbons. The electrical double-layer capacitance per surface area of the templated porous carbons was much larger than those of commercially available activated carbons with high surface areas. The surface of meso- and macropores generated in the porous carbons shows a highly efficient electrical double-layer capacitive property; the specific capacitance per surface area originating from meso- and/or macropores was estimated to be 20 ′ 2 μF cm - 2 .
Amy Wagoner J Johnson - One of the best experts on this subject based on the ideXlab platform.
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mineralization in Micropores of calcium phosphate scaffolds
Acta Biomaterialia, 2019Co-Authors: Laurence E Rustom, Michael J Poellmann, Amy Wagoner J JohnsonAbstract:Abstract With the increasing demand for novel bone repair solutions that overcome the drawbacks of current grafting techniques, the design of artificial bone scaffolds is a central focus in bone regeneration research. Calcium phosphate scaffolds are interesting given their compositional similarity with bone mineral. The majority of studies focus on bone growth in the macropores (>100 µm) of implanted calcium phosphate scaffolds where bone structures such as osteons and trabeculae can form. However, a growing body of research shows that Micropores ( Statement of Significance The design of synthetic bone scaffolds remains a major focus for engineering solutions to repair damaged and diseased bone. Most studies focus on the design of and growth in macropores (>100 µm), however research increasingly shows the importance of microporosity (
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the effect of bmp 2 on micro and macroscale osteointegration of biphasic calcium phosphate scaffolds with multiscale porosity
Acta Biomaterialia, 2010Co-Authors: Sheeny Lan K Levengood, Samantha J Polak, Michael J Poellmann, David J Hoelzle, A J Maki, Sherrie G Clark, Matthew B Wheeler, Amy Wagoner J JohnsonAbstract:It is well established that scaffolds for applications in bone tissue engineering require interconnected pores on the order of 100 microm for bone in growth and nutrient and waste transport. As a result, most studies have focused on scaffold macroporosity (>100 microm). More recently researchers have investigated the role of microporosity in calcium phosphate -based scaffolds. Osteointegration into macropores improves when scaffold rods or struts contain Micropores, typically defined as pores less than approximately 50 microm. We recently demonstrated multiscale osteointegration, or growth into both macropores and intra-red Micropores (<10 microm), of biphasic calcium phosphate (BCP) scaffolds. The combined effect of BMP-2, a potent osteoinductive growth factor, and multiscale porosity has yet to be investigated. In this study we implanted BCP scaffolds into porcine mandibular defects for 3, 6, 12 and 24 weeks and evaluated the effect of BMP-2 on multiscale osteointegration. The results showed that given this in vivo model BMP-2 influences osteointegration at the microscale, but not at the macroscale, but not at the macroscale. Cell density was higher in the rod Micropores for scaffolds containing BMP-2 compared with controls at all time points, but BMP-2 was not required for bone formation in Micropores. In contrast, there was essentially no difference in the fraction of bone in macropores for scaffolds with BMP-2 compared with controls. Additionally, bone in macropores seemed to have reached steady-state by 3 weeks. Multiscale osteointegration results in bone-scaffold composites that are fully osteointegrated, with no 'dead space'. These composites are likely to contain a continuous cell network as well as the potential for enhanced load transfer and improved mechanical properties.
Jun Huang - One of the best experts on this subject based on the ideXlab platform.
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superior co2 adsorption on pine nut shell derived activated carbons and the effective Micropores at different temperatures
Chemical Engineering Journal, 2014Co-Authors: Shubo Deng, Haoran Wei, Tao Chen, Bin Wang, Jun HuangAbstract:Abstract Pine nut shell-derived activated carbons were prepared at different KOH/C mass ratios and activation temperatures, and they were used to adsorb CO2 at different adsorption temperatures and pressures. The optimal activated carbon had the CO2 adsorption of up to 7.7 mmol/g at 273 K and 5.0 mmol/g at 298 K at 1 bar, the highest capacities at ambient pressure among all the biomass-derived carbons. The micropore distribution of activated carbons was highly dependent on the KOH/C ratio and activation temperature in the preparation. The activated carbons with larger Micropores suffered the greater loss of CO2 adsorbed amounts at high adsorption temperatures. The accurate ranges of Micropores responsible for CO2 adsorption at different temperatures were fully studied. When the adsorption temperature increased from 273 to 348 K, the ranges of effective micropore for CO2 adsorption at 1 bar narrowed from 0.33–0.82 nm to 0.33–0.52 nm. Under typical flue gas conditions at 348 K and CO2 partial pressure of 0.15 bar, the effective micropore range decreased to 0.33–0.40 nm, and the CO2 adsorbed amount was about 0.7 mmol/g on p-2–973–1.5. The accurate micropore ranges obtained are helpful in the preparation and selection of efficient activated carbons for CO2 adsorption under different conditions.
