High performance solid state flexible supercapacitor based on molybdenum sulfide hierarchical nanospheres

Microwave Synthesis of Simonkolleite Nanoplatelets on 3D Nickel Foam-graphene for Supercapacitor Applications

“…3(b) shows the first discharge curves of NiF-G/SimonK at galvanostatic current densities of 1, 2.5, 5, 7.5 and 10 Ag -1 in the potential range of 0-0.5 V. The shape of the discharge curves shows the characteristic of pseudo-capacitance, in agreement with the results from CV test. The specific capacitance can be calculated according to the following equation: (1) where C m (F g -1 ) is the specific capacitance, I (mA) the discharge current, t (s) the discharging time, V (V) represents the potential drop during discharge process, and m (mg) the mass of the active material within the electrode. Based on equation (1), the values of the specific capacitance calculated from discharge curves for NiF-G/SimonK are 836, 748.1, 639, 582.3 and 520 F g -1 at 1.0, 2.5, 5.0, 7.5 and 10 A g -1 , respectively.…”

“…The specific capacitance can be calculated according to the following equation: (1) where C m (F g -1 ) is the specific capacitance, I (mA) the discharge current, t (s) the discharging time, V (V) represents the potential drop during discharge process, and m (mg) the mass of the active material within the electrode. Based on equation (1), the values of the specific capacitance calculated from discharge curves for NiF-G/SimonK are 836, 748.1, 639, 582.3 and 520 F g -1 at 1.0, 2.5, 5.0, 7.5 and 10 A g -1 , respectively. This demonstrates that the obtained NiF-G/SimonK electrode possesses a high and stable specific capacitance at high charge/discharge rates, which is very important for electrode materials of supercapacitors to provide a high power density.…”

“…Recently, supercapacitors (SCs) have received increasing attention as a promising energy storage device [1], such as portable electronic devices and will become an attractive power solution to renewable energy power generation [2]. Compared with conventional electrical double layer capacitors (EDLC) operating in a double layer formed on the electrode surface, which limits the specific capacitance and leads to lower energy density relative to their theoretical value, pseudocapacitors utilizing the charges accumulated during a faradaic reaction exhibit a higher capacitance (3-4 times) [3].…”

Newborn 2D materials for flexible energy conversion and storage

“…Recently, MoS 2 hierarchical nanospheres were synthesized by Javed et al [54] via a facile hydrothermal method. In evaluating the electrochemical performance of this MoS 2 -based SCs, high capacitance behavior of these electrodes at a wide range of scan rates was discovered.…”

“…Furthermore, they tested the electrochemical impedance spectroscopy (EIS) of the SCs by the small semicircle and it indicated a good electrical conductivity and low resistance. Meanwhile, the cycling stability was also tested and it showed only 3.5% decrease after 5000 cycles [54]. In another study, a defect-rich MoS 2 ultrathin film was prepared by a simple hydrothermal method.…”