Busing potential function has been used for the computer simulation of ZnCl2 melts. The agreement between the calculated values of inter-ionicc distances and total internal energy with the experimental data are rather...Busing potential function has been used for the computer simulation of ZnCl2 melts. The agreement between the calculated values of inter-ionicc distances and total internal energy with the experimental data are rather good.展开更多
In this study, biologically inspired silk fibroin grafted polyacrylonitrile(SF-g-PAN) filtration membrane was prepared using ZnCl_2 aqueous solution as solvent, avoiding the use of organic solvents. Phase inversion oc...In this study, biologically inspired silk fibroin grafted polyacrylonitrile(SF-g-PAN) filtration membrane was prepared using ZnCl_2 aqueous solution as solvent, avoiding the use of organic solvents. Phase inversion occurred when Zn^(2+)and Cl-ions gradually diffused into water, creating a well-connected ion channel network and the SF-g-PAN filtration membrane was obtained. The membranes were observed by SEM and 3D ultra-depth microscope. The hydrophilic property, pore size distribution and dye rejection of the membrane were investigated. Results showed that the membrane has no finger hole formation because ZnCl_2 aqueous solution has a lower curing rate parameter compared with organic solvents. SF-gPAN membrane possessed good anti-fouling properties and pH sensitivity. The pore size distribution of the SF-g-PAN membrane was 0.25–1.04 nm. The rejection of direct yellow 27(Mw = 662.6) and amaranth(Mw = 604.5) was 96.51% and 30.63%, with the flux of 72.32 L m^(-2) h^(-1) and 73.83 L m^(-2) h^(-1) respectively at0.1 MPa. The SF-g-PAN membrane has a wide range of applications prospect in fine separation, dye desalination, waste water treatment and biomedical fields.展开更多
Zinc-ion hybrid supercapacitors(ZHSCs)have enormous potential for future applications in electric vehi-cles,portable/wearable electronic gadgets,etc.However,to accelerate ZHSC technology towards market applications,it...Zinc-ion hybrid supercapacitors(ZHSCs)have enormous potential for future applications in electric vehi-cles,portable/wearable electronic gadgets,etc.However,to accelerate ZHSC technology towards market applications,it is necessary to overcome research challenges such as Zn dendrites,low Zn utilization,and all-climate adaptability,as well as to streamline the device assembly process.In this study,we propose a new strategy for the facile construction of ZHSC via two porous carbon fabrics and a Zn plating solution.The cathode and current collector of the device are both porous graphitized carbon fabric(PGCF)pre-pared by high-temperature activation of K2 FeO_(4),and the Li_(2)ZnCl_(4)·9H_(2)O electrolyte is verified to possess excellent Zn plating/stripping efficiency and inhibition of Zn dendrite growth in a Zn-Zn symmetric cell model.As a result,the assembled ZHSC has the maximum energy density of 2.02 mWh cm^(−2)and the highest power density of 11.47 mW cm^(−2),and it can operate for 30,000 cycles without capacity degrada-tion.Furthermore,the destruction of the hydrogen bonding network by the high concentration of Cl−at low temperatures endows it with low freezing point properties and excellent ionic activity at low tem-peratures.The device also operated reliably at-60℃,with a maximum areal capacity of 1.15 mAh cm^(−2).This research offers new findings and insights for the development of high-performance ultra-cryogenic ZHSC devices.展开更多
文摘Busing potential function has been used for the computer simulation of ZnCl2 melts. The agreement between the calculated values of inter-ionicc distances and total internal energy with the experimental data are rather good.
基金supported by the National Natural Science Foundation of China (Nos. 51678409, 145 708407, 21476172)Tianjin Science Technology Research Funds of China (Nos. 16JCZDJC37500, 15JCZDJC38300)+1 种基金Program for Innovative Research Team in University of Tianjin (No. TD13-5042)Science Foundation for the Youth Teachers of Peking Union Medical College (No. 2014ZLGC0754)
文摘In this study, biologically inspired silk fibroin grafted polyacrylonitrile(SF-g-PAN) filtration membrane was prepared using ZnCl_2 aqueous solution as solvent, avoiding the use of organic solvents. Phase inversion occurred when Zn^(2+)and Cl-ions gradually diffused into water, creating a well-connected ion channel network and the SF-g-PAN filtration membrane was obtained. The membranes were observed by SEM and 3D ultra-depth microscope. The hydrophilic property, pore size distribution and dye rejection of the membrane were investigated. Results showed that the membrane has no finger hole formation because ZnCl_2 aqueous solution has a lower curing rate parameter compared with organic solvents. SF-gPAN membrane possessed good anti-fouling properties and pH sensitivity. The pore size distribution of the SF-g-PAN membrane was 0.25–1.04 nm. The rejection of direct yellow 27(Mw = 662.6) and amaranth(Mw = 604.5) was 96.51% and 30.63%, with the flux of 72.32 L m^(-2) h^(-1) and 73.83 L m^(-2) h^(-1) respectively at0.1 MPa. The SF-g-PAN membrane has a wide range of applications prospect in fine separation, dye desalination, waste water treatment and biomedical fields.
基金supported by the National Natural Science Foun-dation of China(Grant No.51902041).
文摘Zinc-ion hybrid supercapacitors(ZHSCs)have enormous potential for future applications in electric vehi-cles,portable/wearable electronic gadgets,etc.However,to accelerate ZHSC technology towards market applications,it is necessary to overcome research challenges such as Zn dendrites,low Zn utilization,and all-climate adaptability,as well as to streamline the device assembly process.In this study,we propose a new strategy for the facile construction of ZHSC via two porous carbon fabrics and a Zn plating solution.The cathode and current collector of the device are both porous graphitized carbon fabric(PGCF)pre-pared by high-temperature activation of K2 FeO_(4),and the Li_(2)ZnCl_(4)·9H_(2)O electrolyte is verified to possess excellent Zn plating/stripping efficiency and inhibition of Zn dendrite growth in a Zn-Zn symmetric cell model.As a result,the assembled ZHSC has the maximum energy density of 2.02 mWh cm^(−2)and the highest power density of 11.47 mW cm^(−2),and it can operate for 30,000 cycles without capacity degrada-tion.Furthermore,the destruction of the hydrogen bonding network by the high concentration of Cl−at low temperatures endows it with low freezing point properties and excellent ionic activity at low tem-peratures.The device also operated reliably at-60℃,with a maximum areal capacity of 1.15 mAh cm^(−2).This research offers new findings and insights for the development of high-performance ultra-cryogenic ZHSC devices.
