Three-dimensional(3D)grid porous electrodes introduce vertically aligned pores as a convenient path for the transport of lithium-ions(Li-ions),thereby reducing the total transport distance of Li-ions and improving the...
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Three-dimensional(3D)grid porous electrodes introduce vertically aligned pores as a convenient path for the transport of lithium-ions(Li-ions),thereby reducing the total transport distance of Li-ions and improving the reaction *** there have been other studies focusing on 3D electrodes fabricated by 3D printing,there still exists a gap between electrode design and their electrochemical *** this study,we try to bridge this gap through a comprehensive investigation on the effects of various electrode parameters including the electrode porosity,active material particle diameter,electrode electronic conductivity,electrode thickness,line width,and pore size on the electrochemical *** numerical simulations and experimental investigations are conducted to systematically examine these effects.3D grid porous Li_(4)Ti_(5)O_(12)(LTO)thick electrodes are fabricated by low temperature direct writing technology and the electrodes with the thickness of 1085μm and areal mass loading of 39.44 mg·cm^(−2) are *** electrodes display impressive electrochemical performance with the areal capacity of 5.88 mAh·cm^(−2)@1.0 C,areal energy density of 28.95 J·cm^(−2)@1.0 C,and areal power density of 8.04 mW·cm^(−2)@1.0 *** study can provide design guidelines for obtaining 3D grid porous electrodes with superior electrochemical performance.
The tradeoff between energy and power densities is a critical challenge for commercial tape-cast lithium-ion batteries(LIBs).In this study,three-dimensional(3D)LIBs with interdigitated electrode structures are designe...
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The tradeoff between energy and power densities is a critical challenge for commercial tape-cast lithium-ion batteries(LIBs).In this study,three-dimensional(3D)LIBs with interdigitated electrode structures are designed and fabricated via 3D printing to overcome this *** evolution of battery design from tape-cast thin planar electrodes to interdigitated 3D electrodes is *** simulations based on COMSOL Multiphysics are performed to elucidate the advantages of interdigitated battery *** LIBs composed of comb-like 3D high-voltage LiCoO2(HV-LCO)cathodes and comb-like 3D natural graphite anodes are fabricated via 3D ***,printable HV-LCO inks with appropriate rheological properties are developed for 3D ***-LCO half-cells with Li foil as the counter electrode and an interdigitated full battery with NG anodes as the counter electrode are assembled to test the electrochemical *** results show that interdigitated full batteries fabricated via 3D printing offer high specific capacities and stable cycling *** batteries with an electrode thickness of 882µm can achieve a high areal capacity of 5.88 mAh·cm−2@0.1 C,an areal energy density of 41.4 J·cm−2,and an areal power density of 41.0 mW·cm−2@1.0 C,which are approximately 10 times the values afforded by conventional tape-cast thin batteries.
A sliding mode control (SMC) approach was used in a pneumatic force control servo-system with uncertainties and external disturbances in this paper. To reach exact force control in pneumatic force servo-system, the E/...
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A sliding mode control (SMC) approach was used in a pneumatic force control servo-system with uncertainties and external disturbances in this paper. To reach exact force control in pneumatic force servo-system, the E/P pressure proportional valve was used as an electro-pneumatic converter in constructing an electro-pneumatic force control servo system. The dynamic model of the pneumatic force servo system was built firstly, and then a boundary layer approach was used to the design of controller, in which using a saturation function to substitute for the sign function based on Lyapunov theory. Finally, the performance of the controller was simulated and tested. The results show that the system performance has been much improved when compared with a conventional PID controller, and it has a good control precision and robustness
A hybrid computing intelligence approach was used in the study of an engineering diagnosis problem in this paper. Aimed at the problems of small samples and multi-collinearity of variables in complicated data modeling...
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A hybrid computing intelligence approach was used in the study of an engineering diagnosis problem in this paper. Aimed at the problems of small samples and multi-collinearity of variables in complicated data modeling, RBF neural network was embedded into the regression framework of partial least square (PLS) method. The PLS method was used to extract variable components from sample data and the dimension of input variables was then reduced. Moreover, RBF neural network was used to fit the non-linearity between input and output variables in projection space, and the disadvantages of traditional modeling method were overcome. Finally, this modeling method was applied to the prediction of residual breakdown voltage of the large generator stator insulation. The test results show that the hybrid model has better prediction ability than traditional modeling method
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