All Entries in the Tag : Graphene

US researchers have developed a supercapacitor technology that can be deposited onto plastic film to make flexible capacitors, and silicon die for in-package energy storage. Specific power delivery is higher than traditional supercapacitorsUnconventional internal design yields a larger capacitanceThat property of a system of conductors and dielectrics which permits the storage of electricity when potential difference exists between the conductors. Its value is expressed as the ratio of a quantity of electricity to a potential difference. A capacitance value is always positive. per unit volume than other types. Valuable for high-current and low frequencyThe number of complete cycles or vibrations per unit of time. Rate of alternation in an AC current. Expressed in cycles per second or hertz (Hz). electrical circuits, power supply filters, etc. Applications are similar to those of rechargeable batteries..  ...Read more

Batteries are terrible. Compared to many other methods of storing energy, especially fossil fuels, batteries aren’t very energy dense—that is, a 1-pound battery stores far less energy than is contained in a pound of gasoline. That wouldn’t be so bad if the energy in a battery were easy to replenish—your Tesla might still go only a couple hundred miles on a single chargeThe amount of electricity present upon the capacitor's plates. Also, the act of forcing of electrons onto the capacitor's plates. See CoulombA coulomb is the unit of electric charge. It is named after Charles-Augustin de Coulomb.1 coulomb is the amount of electric charge transported by a current of 1 ampere in 1 second. It can also be defined in terms of capacitance and voltage, where one coulomb is defined as one farad of capacitance times one volt of electric potential difference.., but if you could fully recharge it in five minutes rather than several hours, the low capacity wouldn’t bother you as much.  ...Read more

Abstract: The present disclosure relates to a grapheneGraphene is an allotrope of carbon, whose structure is one-atom-thick planar sheets of sp2-bonded carbon atoms that are densely packed in a honeycomb crystal lattice. paper which reduced grapheneGraphene is an allotrope of carbon, whose structure is one-atom-thick planar sheets of sp2-bonded carbon atoms that are densely packed in a honeycomb crystal lattice. oxide layers and coating layers are stackedMultiple capacitor elements stacked in multi-unit arrangement to provide bulk capacitance and lower ESR.Multiple capacitor elements stackedMultiple capacitor elements stacked in multi-unit arrangement to provide bulk capacitance and lower ESR. in multi-unit arrangement to provide bulk capacitance and lower ESR. in sequence. The grapheneGraphene is an allotrope of carbon, whose structure is one-atom-thick planar sheets of sp2-bonded carbon atoms that are densely packed in a honeycomb crystal lattice. paper prepared according to a preparation method of the present invention has excellent electrical conductivity and mechanical properties, and can be economically prepared in large-sized grapheneGraphene is an allotrope of carbon, whose structure is one-atom-thick planar sheets of sp2-bonded carbon atoms that are densely packed in a honeycomb crystal lattice. paper, therefore may be efficiently applied to various electrical devices such as thin-film electrodes, flexible electrodes, super capacitors, semiconductor insulating layer reinforcements and TFT semiconductor layer-electrodes, and the like. …  ...Read more