Supercapacitor Research

$C=\varepsilon\varepsilon_0A/d

pore size (calculated)= 4000*PV/ SSA

crystallization degree of carbon materials

<p>tanh</p> Signup and view all the answers

<p>least squares method</p> Signup and view all the answers

<p>0.91</p> Signup and view all the answers

<p>$E=CV^2$</p> Signup and view all the answers

<p>Artificial Neural Network Enabled Capacitance Prediction for Carbon-Based Supercapacitors</p> Signup and view all the answers

<p>Shan Zhu, Jiajun Li, Liying Ma, Chunnian He, Enzuo Liu, Fang He, Chunsheng Shi, Naiqin Zhao</p> Signup and view all the answers

<p><a href="https://doi.org/10.1016/j.matlet.2018.09.028">https://doi.org/10.1016/j.matlet.2018.09.028</a></p> Signup and view all the answers

<p>MLBLUE</p> Signup and view all the answers

<p>23 July 2018</p> Signup and view all the answers

<p>6 September 2018</p> Signup and view all the answers

<p>To serve as a service to customers and to allow for copyediting, typesetting, and review of the resulting proof before final publication.</p> Signup and view all the answers

<p>The key component of a supercapacitor is the electrode.</p> Signup and view all the answers

<p>Carbon is the most widely used material for the electrode in supercapacitors.</p> Signup and view all the answers

<p>Some methods to improve the capacitance of carbon-based electrodes include increasing specific surface area, controlling pore structure, and introducing surface functional groups.</p> Signup and view all the answers

<p>The advantage of using an artificial neural network (ANN) is that it can discover relationships between inputs and outputs of a system without a detailed understanding of the mechanisms involved.</p> Signup and view all the answers

<p>One feasible method is to draw insights from a large amount of data.</p> Signup and view all the answers

<p>Some factors that affect the performance of carbon-based supercapacitors include the materials' microstructures, surface functional groups, and testing details of practical application.</p> Signup and view all the answers

<p>More than 300 published papers about carbon-based supercapacitors were collected to build the database.</p> Signup and view all the answers

<p>ANN technology</p> Signup and view all the answers

<p>specific surface area, calculated pore size, ID/IG ratio, N-doping level, voltage window</p> Signup and view all the answers

<p>ANN</p> Signup and view all the answers

<p>3.3%</p> Signup and view all the answers

<p>almost 90%</p> Signup and view all the answers

<p>its ability to recognize patterns in a series of input and output data without any prior assumptions about their nature and interrelations</p> Signup and view all the answers

<p>small number of data points</p> Signup and view all the answers

<p>by increasing the number of samples</p> Signup and view all the answers

<p>assisting researchers in material science and application design</p> Signup and view all the answers

<p>Electrochemical double-layer capacitors (EDLCs) and pseudocapacitors.</p> Signup and view all the answers

<p>Chemical stability, less weight, low cost, good electric conductivity, and environment-friendly advantage.</p> Signup and view all the answers

<p>KOH (potassium hydroxide).</p> Signup and view all the answers

<p>Treating carbon sources with chemical agents and in situ doping using nitrogen-containing precursors.</p> Signup and view all the answers

<p>Melamine is used as a nitrogen source in the synthesis of nitrogen-doped carbon sheets.</p> Signup and view all the answers

<p>The resulting carbon sheets have a specific surface area of 1997.5 m^2 g^-1.</p> Signup and view all the answers

<p>The mass ratio of glucose to melamine in the synthesis of N-doped carbon sheets is 1:1.</p> Signup and view all the answers

<p>The heating rate during the synthesis of N-doped carbon sheets is 4 °C min^-1.</p> Signup and view all the answers

<p>E = \frac{1}{2} CV^2</p> Signup and view all the answers

<p>P = E \cdot t</p> Signup and view all the answers

<p>C = \frac{I \cdot \Delta t}{m \cdot \Delta V} and C = \frac{m \cdot V \cdot I}{\Delta t \cdot \Delta V}</p> Signup and view all the answers

<p>Cs = \frac{4I \cdot \Delta t}{m \cdot \Delta V}</p> Signup and view all the answers

<p>The peak corresponds to the D-band and suggests the presence of disordered carbon structure.</p> Signup and view all the answers

<p>The intensity ratio of D and G bands (ID/IG) is calculated to be 0.92, indicating a low crystallinity of the obtained NACS.</p> Signup and view all the answers

<p>Three chemical elements of carbon, nitrogen, and oxygen can be detected.</p> Signup and view all the answers

<p>The four different types of nitrogen functionalities observed in the high resolution N1s spectrum are pyridinic-N (N6) at 398.3 eV, pyrrolic-N (N-5) at 400.2 eV, quaternary-N (N-Q) at 401.4 eV, and pyridine-N-oxide (N-X) at 403.0 eV.</p> Signup and view all the answers

<p>312 F g^-1</p> Signup and view all the answers

<p>246 F g^-1</p> Signup and view all the answers

<ol> <li>The sheet-like morphology provides a large exposed area to electrolytes and a short diffusion distance for electrolyte ions into the inner pore walls. 2) The hierarchical micro/mesoporous structure with high specific surface area, microporous volume, and uniform pore size distribution could accelerate ion transport process within the pore channels and provide abundant inner surface regions for ion accumulation. 3) Doping nitrogen groups increase the surface wetting characters, improve the conductivity of carbon materials, and introduce extra pseudocapacitance, thus further enhancing the capacity performance.</li> </ol> Signup and view all the answers

<p>E = 0.5CV^2</p> Signup and view all the answers

<p>C = \frac{Q},{V} = \frac{nF},{m} = \frac{m},{V}</p> Signup and view all the answers

<p>NACS</p> Signup and view all the answers

<p>Analyzing complex variables and predicting the capacitive properties of carbon-based supercapacitors.</p> Signup and view all the answers

<p>melamine-assisted chemical blowing method</p> Signup and view all the answers

<p>hierarchical porous structure, high nitrogen content, high specific capacitance (312 F g^-1), and good rate performance</p> Signup and view all the answers

<p>20.2 Wh kg^-1 at 448 W kg^-1</p> Signup and view all the answers

<p>3</p> Signup and view all the answers

<p>The purpose of the chemical blowing process is to blow the melted glucose to form sheet-like precursors, together with doping nitrogen element.</p> Signup and view all the answers

<p>The KOH chemical activation results in the decrease in thickness of sheets and the formation of numerous wrinkles on NACS.</p> Signup and view all the answers

<p>The NACS material exhibits a type I isotherm due to the large N2 adsorption quantity in the low pressure region.</p> Signup and view all the answers

<p>The specific surface area (SBET) of NACS is 1997.5 m2 g^-1, the micropore surface area (Smicropore) is 1220.9 m2 g^-1, the mesopore surface area (Smesopore) is 776.6 m2 g^-1, the total pore volume (Vtotal) is 0.94 cm3 g^-1, and the average pore diameter (Dp) is 2.73 nm.</p> Signup and view all the answers