electrode capacitance
2.From the charge-discharge curves,it is obvious that the discharge curve of the compos- ite electrode with 80% activated carbon content is linearity relation,and the composite electrode represents good capacitance performance as well the capacitance increases 25% with compounding only 20% LiMn_2O_4.The re- sults of AC impedance testing indicate that the solution resistance of composite electrode with 80% activated carbon content is only 0.lΩ,which represents ideal capacitance performance.
3.The capacitance between gate and source of α-Si TFT consists of not only parasitic capacitance C_(gsp) due to overlaps between gate and source electrodes, but also intrinsic capacitance C_(gsp) of the channel between the source side and gate electrode.
4.This paper describes a reconstructive algorithm which is based on network theory for electrical capacitance tomography technic.There are twelve electrodes in the system.The permittivity distribution of flow with two components within a pipeline is reconstructed.Assume the permittivity distribution of the region to be reconstructed.Then whole measured area is discretized into a network composed of capacitance.The measurement circuit which contains a pair of source electrode and detecting electrode is taken as a four-terminal network.The across admittance of the four-teminal network is proportional to the capacitance between the source electrode and the detecting electrode.Modify the distribution of the permittivity according to the difference between the calculated capacitance and measured capacitance.The experimental results show that this algorithm is effective and can coverge.
5.By optimizing the AC/CB ratio, the specific capacitance of the composite electrode is maximized when the mass ratio of AC/CB is 7:2;
6.The results show that the PANI electrode grown with 5 mV/s has the largest specific surface area and the lowest resistance and the best electrochemical performance among those electrodes. When the charge-discharge current density is 0.1 A/g,the specific capacitance can reach 860 F/g. And when the current increase to 1 A/g,the specific capacitance is about 485 F/g.
7.The electrochemical capacitor with the high electrochemical activity sample as active material has the specific capacitance up to 177.5 F/g in the 0.5 mol/L Na 2SO 4 solution within 0～0.85 V SCE (saturated calomel electrode) potenitial.
8.Two excellent technological parameters were selected such as the electrodes of graphite and Crl2MoV, voltage of 60V, capacitance of 180μP, lathe rotational speed of 1.04r/min, electrode shape is bar with 3×3mm cross-section.
9.But from the results of cyclic voltammetric and galvanostatic charge/discharge experiments, we found that the specific capacitance of acid-treated CAW (256F/g) was much higher than the CAW without the acid treatment (122F/g). The CAW electrode was found to have low ESR and good cycling stability.
