11 results about "Electrochemical capacitance" patented technology

Disclosed herein are methods for producing electrodes comprising single-layer 1T′-transition metal dichalcogenide (TMD) nanosheets. The method includes filtering a suspension of single-layer 1T′-TMD nanosheets over a polymeric substrate to produce the electrode, wherein, the single-layer 1T′-TMD nanosheets of the electrode are no more than 1,000 nm in thickness; the electrode comprises at least 70% 1T′-phase; and the electrode has a calculated electrochemical active surface area (ECSA) that is about 10-fold higher than that of a control electrode, which comprises 2H-TMD nanosheets. Also disclosed herein are methods for deionizing a fluid. The method includes steps of discharging the fluid in an electrochemical capacitor at a constant voltage of no more than 0.5 V to deionize the fluid, wherein the electrochemical capacitor is characterized in having the electrode comprising single-layer 1T′-TMD nanosheets produced by the present method.

The invention relates to a solar charging circuit, a method, a power supply device and equipment, and the solar charging circuit carries out the boosting of a solar electric signal outputted by a solar panel through a boosting charging module under the control of a solar charging enabling end, and outputs a boosting charging signal to an electrochemical capacitor module. The electrochemical capacitor module charges an electrochemical container in the electrochemical capacitor module according to the boost charging signal so as to realize low-temperature charging, and the linear charging module charges the electrochemical container in the electrochemical capacitor module according to the battery temperature corresponding to the lithium battery under the control of the capacitor charging enable signal end. A battery charging signal is output to a lithium battery module based on a capacitor voltage signal provided by an electrochemical hybrid capacitor, so that the lithium battery module charges a lithium battery according to the battery charging signal, the lithium battery is charged by using the electric quantity stored by the electrochemical hybrid capacitor, and the energy of solar energy can be further utilized to a greater extent; and the endurance time of the battery is prolonged.

A disclosed electrochemical capacitor includes a positive electrode, a negative electrode, a separator, and an electrolyte having lithium ion conductivity. The positive electrode includes a positive electrode current collector and a positive electrode mixture layer that is carried on the positive electrode current collector and that undergoes reversible anion doping. The negative electrode includes a negative electrode current collector and a negative electrode mixture layer that is carried on the negative electrode current collector and that undergoes reversible lithium ion doping. The negative electrode mixture layer contains a negative electrode active material, a conductive agent, a binder, and a dispersant. The ratio of the mass of the dispersant to the mass of the negative electrode mixture layer is greater than the ratio of the mass of the binder to the mass of the negative electrode mixture layer.

The layered material (1a) has a layer (10). The layer (10) has a main body (11) and a terminal (12). The main body (11) has M1 (1‑a)m M2 am X n The composition. In this composition, M1 and M2 are different atoms selected from Ti, Sc, Y, La, Zr and Hf. X contains at least one of carbon and nitrogen atoms. a is greater than 0 and less than 1. n is greater than 1 and less than 4. m is greater than n and less than 5. Terminal (12) is present on the surface of the body (11).

The invention discloses a high surface capacity capacitive type electrochemical capacitor electrode and a preparation method thereof, and the preparation method comprises the following steps: (1) dissolving Ni (NO3) 3, NH4F and urea in deionized water, then adding nickel foam, and carrying out hydrothermal reaction treatment to obtain a Ni (OH) 2 / nickel foam precursor; (2) washing and drying the Ni (OH) 2 / nickel foam precursor, and then depositing a MoO3 thin layer on the Ni (OH) 2 / nickel foam precursor by adopting an atomic layer deposition method to obtain a composite precursor; and (3) annealing the composite precursor in a mixed atmosphere of NH3 and Ar to obtain the high-surface-capacity capacitive electrochemical capacitor electrode. The electrode prepared by the invention shows high specific capacity, excellent rate capability and long-term cycling stability in a water-based hybrid capacitor, the capacity retention rate can reach about 80% after cycling for 7000 times under a high-rate charge-discharge condition, and stable output performance is maintained under high-power instantaneous discharge.

Described herein are electrochemical capacitive biosensors, methods of making same, and methods of using same. The electrochemical capacitive biosensors are especially useful for detecting pathogens, including viruses, bacteria, and allergens, in aerosols and complex biological media.

Described herein are electrochemical capacitive biosensors, methods of making same, and methods of using same. The electrochemical capacitive biosensors are especially useful for detecting pathogens, including viruses, bacteria, and allergens, in aerosols and complex biological media.

A composite comprises vertically aligned carbon nanotubes (VACNT) on a substrate and additional disordered carbon deposited on the outer face of the nanotubes. This additional carbon is not amorphous but comprises graphitic domains. This composite can be prepared by a chemical vapor deposition (CVD) process in the presence of a catalyst on a metal substrate at atmospheric pressure. It can be used as an electrode in electronic and electrotechnical devices, such as supercapacitors.

The disclosed electrochemical capacitor has a pair of electrodes and an electrolyte. At least one of the pair of electrodes includes a current collector and an active layer disposed on a surface of the current collector. The active layer includes activated carbon and a dispersant. The activated carbon includes a first metal. The ratio of the first metal in the activated carbon is 10 ppm or more on a mass basis. The dispersant includes at least one selected from the group consisting of carboxyalkyl cellulose and an ammonium salt of carboxyalkyl cellulose.

The present application relates to a solar energy charging circuit, a method, a power supply apparatus and a device. Under the control of a solar charging enable terminal, the solar energy charging circuit boosts, by means of a boost charging module, a solar electrical signal output by a solar panel, and outputs a boosted charging signal to an electrochemical capacitor module, so that the electrochemical capacitor module charges an electrochemical hybrid capacitor in the electrochemical capacitor module on the basis of the boosted charging signal, so as to achieve low-temperature charging. Moreover, on the basis of a battery temperature corresponding to a lithium battery and under the control of a capacitor charging enable signal terminal, the solar energy charging circuit outputs a battery charging signal to a lithium battery module by means of a linear charging module on the basis of a capacitor voltage signal provided by the electrochemical hybrid capacitor, so that the lithium battery module charges the lithium battery on the basis of the battery charging signal, thereby using electric energy stored in the electrochemical hybrid capacitor to charge the lithium battery, and consequently, solar energy can be utilized more fully, and battery endurance duration is prolonged.

The application belongs to the technical field of semiconductor material characterization, and relates to a carrier concentration detection method for antimonide materials, which comprises the following steps: growing a first antimonide compound material layer on a conductive gallium antimonide substrate; performing electrochemical capacitance-voltage testing on the first antimonide compound material layer to obtain a first carrier concentration value; growing a second antimonide compound material layer on a semi-insulating gallium arsenide substrate; performing Hall effect testing on the second antimonide compound material layer to obtain a second carrier concentration value; obtaining a carrier concentration correction factor based on the ratio of the second carrier concentration value to the first carrier concentration value; growing an antimonide compound material layer on the side, away from the substrate, of the first antimonide compound material layer and / or the second antimonide compound material layer; performing electrochemical capacitance-voltage testing on each antimonide compound material layer to obtain a corresponding carrier concentration value; and obtaining the carrier concentration of each antimonide compound material layer based on the carrier concentration value and the carrier concentration correction factor.