48results about How to "Wide potential window" patented technology

An all-solid-state lithium ion secondary battery containing a novel garnet-type oxide serving as a solid electrolyte. The garnet-type lithium ion-conducting oxide is one represented by the formula Li5+XLa3(ZrX, A2-X)O12, wherein A is at least one selected from the group consisting of Sc, Ti, V, Y, Nb, Hf, Ta, Al, Si, Ga, Ge, and Sn and X satisfies the inequality 1.4≦X<2, or is one obtained by substituting an element having an ionic radius different from that of Zr for Zr sites in an garnet-type lithium ion-conducting oxide represented by the formula Li7La3Zr2O12, wherein the normalized intensity of an X-ray diffraction (XRD) pattern with a diffraction peak, as normalized on the basis of the intensity of a diffraction peak, is 9.2 or more.

The present invention provides an aqueous electrolyte and a supercapacitor. The aqueous electrolyte includes glucose, water and inorganic salts. Compared with the prior art, in the present invention, glucose is added to the aqueous electrolyte using inorganic salt as electrolyte, and the freezing point of the obtained glucose-water-salt electrolyte is lower than the freezing point of the water-salt electrolyte, and it is not easy to freeze, so that it is difficult to freeze. The water-based electrolyte still has good electrochemical performance at a lower temperature, breaking through the limitation of using the water-based electrolyte under low temperature conditions; further, the present invention preferably uses sodium perchlorate as the electrolyte, so that the obtained water-based electrolyte The liquid has higher electrical conductivity, larger working temperature range and wider potential window, so that the aqueous electrolyte still has good performance under low temperature conditions; in addition, the present invention uses glucose as an antifreeze additive to reduce the freezing point of the aqueous electrolyte , Glucose is an environmentally friendly substance with a wide range of sources, cheap and easy to obtain.

The principal object of the present invention is to provide a liquid electrolyte for electrochemical device having a wide potential window. The invention solves the problem by providing a liquid electrolyte for electrochemical device, which comprises an electrolyte dissolved in an MFx complex being liquid at ordinary temperatures wherein “M” represents B, Si, P, As or Sb and “X” represents the valence of “M”.

An electrochemical gas sensor (9) has improved electrochemical measurement properties and housing tightness for an electrolyte at the sites at which the connection lines (11, 21, 31) pass through. The sensor (9) includes a housing (4), containing at least one measuring electrode (1) and a counterelectrode (2) and with electric connection lines (11, 21, 31) from the electrodes (1, 2, 3) to a measuring unit (8) arranged outside the housing (4). The electric connection lines (11, 21, 31) include carbon nanotubes (CNT, Carbon Nanotubes) at least in some sections in the housing (4) in the area of the electrolyte wetting.

Relating to the field of analytical chemistry detection, the invention provides a carbon paste electrode for detection of hydroquinone, and a preparation and detection method thereof. The carbon paste electrode for detection of hydroquinone comprises a carbon paste, an electrode tube, an electrode lead wire, and a graphene oxide coating. The electrode tube has a first end and a second end opposite in positions, the carbon paste is pressed into the electrode tube from the first end of the electrode tube, the electrode lead wire contacts the carbon paste, and is led out from the second end of the electrode tube, and the graphene oxide layer is formed on the surface of the first end. The carbon paste electrode modifies graphene oxide to a carbon paste electrode substrate, and graphene oxide is an excellent modifier and has good electrocatalytic response to hydroquinone. Also the carbon paste electrode has the advantages of simple making, long service cycle, good stability, high sensitivity, low cost, easy preparation and excellent reproducibility, etc., and can be used for determination of hydroquinone in water samples. In addition, the invention also relates to a preparation method of the carbon paste electrode and a detection method of hydroquinone.

The invention provides a preparation method of a composite electrode material. The preparation method comprises the following steps of performing mixing on soluble divalent nickel salt, soluble divalent cobalt salt, hexamethylene tetramine, lanthanum manganate and a solvent to obtain a mixed liquid; adding foamy nickel into the mixed liquid to be subjected to a hydrothermal reaction to obtain a precursor; and performing drying and annealing on the precursor in sequence to obtain the composite electrode material. A core-shell nanometer flower structure is grown on the conductive substrate foamynickel to be directly used as an electrode, so that use of a conductive agent and a binder in the conventional coating method can be avoided, and extra contact resistance is lowered; and through a synergistic effect of NiCo<2>O<4> and LaMnO<3>, the potential window is expanded and the energy density of a supercapacitor is improved.