Reasonable design of materials with complex nanostructures and diverse chemical compositions is of great significance in the field of energy storage. CuKS (CKS) is considered a potential electrode material for supercapacitors due to its superior electrical conductivity. Transition metal hydroxides are widely used as electrode materials for supercapacitors due to their high theoretical specific capacitance (); however, single metal species with limited active sites restrict their further applications for energy storage. Herein, through a hydrothermal reaction, CKS nanorods were prepared, and then binary metal hydroxide NiCo(OH) nanosheets were generated directly on CKS nanorods through a one-step hydrothermal reaction to form a nano-core-shell structure (NCSS). By regulating the mole ratio of nickel nitrate to cobalt nitrate, the resulting NiCo(OH) nanosheets with the best electrochemical activity were prepared and supported on CKS nanorods to form a CKS@NCOH NCSS. The as-prepared CKS@NCOH NCSS has a larger specific surface area, which can provide more active sites, while the abundant metal species composition can generate abundant redox reactions to boost the pseudocapacitance. The prepared CKS@NCOH/NF electrode exhibits outstanding specific capacitance and cycle life. The assembled CKS@NCOH/NF//AC all-solid-state asymmetric supercapacitor achieves a high energy density of 88.7 Wh kg at a power density of 849.9 W kg with superior cycle life. Therefore, the use of polymetallic hydroxides to construct NCSS electrodes has great research significance and broad application prospects.
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http://dx.doi.org/10.1021/acsami.2c08546 | DOI Listing |
Soft Matter
November 2022
Department of Physics, Indian Institute of Science, Bengaluru 560012, India.
Under applied stress, the viscosity of many dense particulate suspensions increases drastically, a response known as discontinuous shear-thickening (DST). In some cases, the applied stress can even transform the suspension into a solid-like shear jammed state. Although shear jamming (SJ) has been probed for dense suspensions with particles having well-defined shapes, such a phenomenon for fractal objects has not been explored.
View Article and Find Full Text PDFACS Appl Mater Interfaces
August 2022
College of Materials Science and Engineering, Institute for Graphene Applied Technology Innovation, Qingdao University, Qingdao 266071, China.
Reasonable design of materials with complex nanostructures and diverse chemical compositions is of great significance in the field of energy storage. CuKS (CKS) is considered a potential electrode material for supercapacitors due to its superior electrical conductivity. Transition metal hydroxides are widely used as electrode materials for supercapacitors due to their high theoretical specific capacitance (); however, single metal species with limited active sites restrict their further applications for energy storage.
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