Supercapacitors with good electrochemical performance and flexibility are in great demand.In this paper,the concept of preparing 3D porous carbon monoliths via direct calcination of melamine sponge is presented.This p...Supercapacitors with good electrochemical performance and flexibility are in great demand.In this paper,the concept of preparing 3D porous carbon monoliths via direct calcination of melamine sponge is presented.This preparation method is simple and has good control of the structure.Porous carbon composite nickel-manga nese oxides can be obtained by hydrothermal method followed with calcination.The electrochemical performances were tested and porous carbon monoliths with NiMn oxides exhibited a specific capacitance of 870 F/g in 1 mol/L KOH at a charge/discharge current density of 0.5 A/g and a capacity retention of 89.9% after 5000 times charge and discharge.展开更多
Ionic liquids, defined here as room-temperature molten salts, composed mainly of organic cations and(in)organic anions ions that may undergo almost unlimited structural variations with melting points below 100?C. They...Ionic liquids, defined here as room-temperature molten salts, composed mainly of organic cations and(in)organic anions ions that may undergo almost unlimited structural variations with melting points below 100?C. They offer a unique series of physical and chemical properties that make them extreme important candidates for several energy applications, especially for clean and sustainable energy storage and conversion materials and devices. Ionic liquids exhibit high thermal and electrochemical stability coupled with low volatility, create the possibility of designing appropriate electrolytes for different type batteries and supercapacitors. Herein, varieties of ionic liquids applications are reviewed on their utilization as electrolytes for Li-ion batteries, Na-ion batteries, Li-O_2(air) batteries, Li-Sulfur(Li-S) batteries, supercapacitors and as precursors to prepare and modify the electrode materials, meanwhile,some important research results in recent years are specially introduced, and the perspective on novel application of ionic liquids is also discussed.展开更多
基金financial support from the National Natural Science Foundation of China(Nos.21576034 and 51908092)the State Education Ministry and Fundamental Research Funds for the Central Universities(Nos.2019CDQYCL042,2019CDXYCL0031,2018CDYJSY0055,2018CDQYCL0027,106112017CDJQJ138802,106112017CDJSK04XK11 and 106112017CDJXSYY0001)the Joint Funds of the National Natural Science Foundation of ChinaGuangdong(No.U1801254)。
文摘Supercapacitors with good electrochemical performance and flexibility are in great demand.In this paper,the concept of preparing 3D porous carbon monoliths via direct calcination of melamine sponge is presented.This preparation method is simple and has good control of the structure.Porous carbon composite nickel-manga nese oxides can be obtained by hydrothermal method followed with calcination.The electrochemical performances were tested and porous carbon monoliths with NiMn oxides exhibited a specific capacitance of 870 F/g in 1 mol/L KOH at a charge/discharge current density of 0.5 A/g and a capacity retention of 89.9% after 5000 times charge and discharge.
基金supported financiallyby the National Natural Science Foundation of China (Grants 51622202,U1507107,21503009 and 21603009)the National Key R&D Program of China (Grant No.2018YFB0104302)+1 种基金Beijing Natural Science Foundation (B) (KZ201610005003)Guangdong Provincial Science and Technology Program (2016B010114001)
文摘Ionic liquids, defined here as room-temperature molten salts, composed mainly of organic cations and(in)organic anions ions that may undergo almost unlimited structural variations with melting points below 100?C. They offer a unique series of physical and chemical properties that make them extreme important candidates for several energy applications, especially for clean and sustainable energy storage and conversion materials and devices. Ionic liquids exhibit high thermal and electrochemical stability coupled with low volatility, create the possibility of designing appropriate electrolytes for different type batteries and supercapacitors. Herein, varieties of ionic liquids applications are reviewed on their utilization as electrolytes for Li-ion batteries, Na-ion batteries, Li-O_2(air) batteries, Li-Sulfur(Li-S) batteries, supercapacitors and as precursors to prepare and modify the electrode materials, meanwhile,some important research results in recent years are specially introduced, and the perspective on novel application of ionic liquids is also discussed.
