bioinspired fractal electrodes for solar energy storages - home energy storage
Solar energy storage is an emerging technology that promotes solar energy as the primary source of electricity.
The latest development of laser-engraved graphene electrodes with high conductivity provides a green technology platform for super capacitors
Cost based on energy storage-
Effective environment
Friendly features, along with the on-
Chip integration.
Due to the limitation of ions-
The energy density of these super capacitors is limited ~ Below 3x10-3 x whcm-3.
In this paper, we present a new design of a bionic laser-engraved graphene electrode for solar storage, which contains ferns characterized by a family of fractal geometric space filling curves
This new conceptual design eliminates the limitations of conventional flat Capacitors by significantly increasing the ratio of the active surface area to volume of the new electrode and reducing the electrolyte Ion path.
Therefore, the energy density obtained increased significantly to 10-1-3-
It is more than 30 times more efficient than the solar storage plane electrode with about 95% Cullen efficiency.
The energy storage of these new electrodes opens up efficient self-
Power and solar-
Wearable, flexible and portable applications are supported.
Modification of the Hummer integrated global observation system.
We used two kinds of electrolyte :(1-butyl-3-
The second (
Trifluoride and sulfur-based)imide {[BMIM][NTf]}(Sigma-Aldrich)
By adding the gas phase method silica, ionic liquid and ionic gel with a size of 7 nm (Sigma-Aldrich)
Their respective ionic liquids. 1.
3 mg/ml of GOs is dispersed in water and drip cast on the glass substrate.
It can be dried for 24 hours under ambient conditions.
Ion Gel was prepared by mixing the gas phase method silica nano-powder with ionic liquid (1-butyl-3-
The second (
Trifluoride and sulfur-based)imide {[BMIM][NTf]}in a ratio 0. 03u2009g/1.
Stir the mixture in a nitrogen atmosphere for about 5 hours.
The electrode window of electrolyte is 2. 5u2009V.
Computer-
Use CO laser beam to assist laser paddling (Versa laser)
Wavelength 10.
6 μm, we have made laser-engraved graphene (LSG)electrodes.
We found BFE-MSC drops ~
Compared to films prepared by other methods, the performance of the performance film is the best.
Threshold power of water drop laser paddings-
The actor of the movie GO is one person.
9 u2009 w obtained from references.
The theoretical consideration included in this work is the use of Gouy-Chapman-
Stern standard model for double-layer capacitors on the metal/ionic liquid interface.
The model takes into account a "Helmholtz mhoz layer" of internal atomic size, a free, externally charged "diffusion layer"Chapman layer”.
Based on the equivalent circuit model, the simulation is carried out using Matlab.
In the simulation, we consider the following conditions: including the electro-chemical measurement of cyclic KVA with step size 0. 1 v from 0 to 2.
5 v, electrostatic charging-
Discharge and impedance spectrum in 10 khz-frequency range
10 hz was performed using a constant potential meter station (Autolab 100)
At room temperature
The volume of the device consists of two LSG collector electrodes, LSG plane or fractal electrodes and separators.
Based on these measurements, we followed the reference for the calculation of energy and power density.
Simply put, the specific capacitance is static according to the current (CC)
The formula shows the curve at different current densities: where is the applied current (in amps, A)
And is the slope of the emission curve (
V/s, in Volts/seconds).
The volume capacitance is given by the reference area of A and V (cm)and volume (cm).
The power density of the device is calculated according to the electrostatic curve at different charge/discharge densities, and is given by the formula: where P is the power and Δis the working voltage window, if the internal resistance of the device can be given by formula: the energy density of the device can be calculated by formula: where E is the energy density, the volume capacitance, and the working voltage window V.
We conducted a theoretical study to learn more about the temperature distribution of GO films during continuous waves (CW)
Comsol multi-physical software based on finite element method for laser irradiation process with wavelength of 1064 nm (FEM)
By solving the heat balance equation.
The thickness of each film is 1.
5 u2009 nm on quartz glass substrate.
The boundary conditions are selected as thermal insulation materials in various directions to take into account the thermal conductivity of air and GO.
The boundary conditions are selected as thermal insulation materials in various directions to take into account the thermal conductivity of air and GO.
If the laser radiation is uniform in space, the absorbed laser energy is instantly converted into local heat, which can be spread by heat conduction and heat conduction)
When the mass density is p, the depth and time are C, the specific heat is the absorption coefficient, and the k is the thermal conductivity.
The laser power density I is determined by the interaction of the laser radiation with the GO film and the subsequent transfer of energy to the lattice.
The laser power density can be reflectivity and I in R (t)
Is the time distribution of laser power.
In the simulation, we considered the same laser power in the experiments performed at room temperature at an initial temperature of 25 °c.
We considered up to 10 layers in the simulation study to obtain the temperature distribution with very fine grid division conditions.
The material parameters used for simulation are non-crystalline carbon to obtain a reasonable temperature.
The thermal conductivity of GO and quartz glass is considered to be of the same sex.
This idea is considered to attract
No matter how many layers, GO at 10 64 nm is constant.
We followed the manufacturing on described in our previous paper-
Chip energy storage integrated with solar cells.
The aluminum strip is used as a current collector as shown in the figure.
In short, the current collector is P-attached to the back-I-N thin film a-
Silicon solar cells, using aluminum tape from BFE-
Adhesive is used between MSC electrodes as silver paste to improve conductivity.
GOs is deposited on the back of the solar cell, the insulation layer of the solar cell is SU8 resist, and the laser rowing of the BSE pattern is carried out at the power of 1. 9u2009W.
Finally, the integrated device is packaged with glass substrate to make it easy to carry.
The performance of solar cells before and after packaging is analyzed.
In addition, the study was expanded at different time intervals during the solar charging process ().
Solar Charge measurement is studied in solar simulator (Oriel 3A)under a One-Sun condition (1000u2009W/m)
At room temperature.
The aluminum belt is connected between the solar cell and the energy storage, so the charge generated in the solar cell will charge the energy storage at the same time, depending on the ability of energy storage to store charge and the ability of solar cells to generate charge over a longer exposure time, the saturation phase was observed, and the self
Discharge was studied under atmospheric conditions.
Columbia efficiency is calculated according to the formula, which is the amount of charge that exists in the discharge cycle of the super capacitor, and the amount of charge that exists in the charging cycle of the super capacitor.
Electrostatic charging-
The discharge study was carried out with an applied current of 0.
03A shows the excellent stability of the integrated energy storage device ().