30results about How to "Improve dissociation ability" patented technology

The invention relates to the field of lithium batteries, and discloses a carbamate compound for a non-aqueous electrolyte and application of the carbamate compound. The carbamate compound according to the present invention has the following advantages: (i) excellent electrochemical stability, which is not oxidized even at a high voltage; (ii) the conductivity of the electrolyte can be improved, the affinity of molecules to the metal oxide positive electrode material can be enhanced, and the infiltration efficiency of the electrolyte can be further improved; (iii) the contact angle of molecules on the surface of a positive electrode or a negative electrode is reduced, and the wetting effect is improved.

The invention discloses a medium-salt-concentration electrolyte for a lithium-sulfur battery. The electrolyte contains a diether-fluorinated ether three-solvent system formed by a mixed lithium salt, a first ether solvent, a diether solvent and at least one fluorinated ether solvent, the mixed lithium salt contains a lithium salt capable of forming a passive film on the lithium metal negative electrode; the oxygen coordination steric hindrance of the first ether solvent is small (the number of carbon atoms in molecules / the number of oxygen atoms is smaller than or equal to 4), and lithium salt can be dissociated; the oxygen coordination steric hindrance of the second ether solvent is relatively large (the number of carbon atoms / the number of oxygen atoms in molecules is greater than or equal to 5), so that the salt concentration and the electrolyte viscosity can be reduced; the fluorinated ether solvent can further reduce the concentration of the lithium salt and improve the miscibility of the electrolyte, the fluorinated group can promote formation of a stable lithium metal negative electrode passivation layer, and the deposition and stripping efficiency of negative electrode metal is improved. The electrolyte provided by the invention can be used for assembling a lithium battery, and the assembled lithium battery is long in cycle life, weak in self-discharge effect, high in conductivity, low in viscosity, good in wettability and relatively high in commercial application value.

An electrolyte solution is used for a lithium ion battery. The electrolyte solution contains at least a solvent and lithium salt. The solvent contains at least methoxymethyl formate.

The invention discloses a two-stage cavitation bubble generator, comprising: a first cavitation section, which includes a first jet chamber, a compression channel, an air cavity, and a mixing channel; the first jet chamber, a compression channel, an air chamber, The mixing channel communicates in sequence along the fluid flow direction; the second cavitation section, which includes a second jet chamber with an open end, an outlet channel for outputting fluid, and a central body; the open end of the second jet chamber is connected to the fluid in the first cavitation section The output end is connected, and the other end of the second jet chamber communicates with the outlet channel; the wall of the second jet chamber is provided with a low-pressure fluid inlet communicating with it; the center body is arranged in the middle of the second jet chamber and is fixedly connected with it, and the center body The radial center is provided with a center body channel for mixing fluid and gas. The cavitation bubble generator has high cavitation efficiency, and a single generator has a wide range of cavitation effects, which can be effectively used in the dissociation process of high-sulfur slag, improve the separation effect of slag-sulfur, and provide a good solution for subsequent flotation sulfur extraction. Base.

The invention relates to the field of lithium ion batteries and discloses lithium ion battery nonaqueous electrolyte and a lithium ion battery. The lithium ion battery nonaqueous electrolyte comprisesan electrolyte lithium salt, a nonaqueous organic solvent and a filming additive, wherein the nonaqueous organic solvent comprises cyclic carbonate, chain-shaped carbonate and a carboxylic acid estersolvent; the chain-shaped carbonate comprises a novel carbonic ester compound of a structure of formula (I). Due to adoption of the novel carbonic ester solvent of the structure of the formula (I), an electrochemical window of electrolyte can be effectively improved, and application of high-voltage system batteries can be met. Meanwhile, due to adoption of a nitrile additive, FEC gas generation can be effectively inhibited; due to adoption of cobalt for complexing an anode material, a function of improving properties of a battery is achieved; multiple novel filming lithium salts are combined,so that the high / low-temperature performance, the rate capability and the long circulation performance of a power battery can be improved.

The invention discloses a CuO composite mesogen catalyst modified by an atomic-level auxiliary agent, which comprises a main catalyst CuO mesogen and a single-atom auxiliary agent M1 or a double-monoatom auxiliary agent M1 and M2, and M1 and M2 are dispersed by single atoms The state exists, wherein, the M1 is selected from any one of Zn, Zr, Ti, Mn, Fe, Co, Ni, Sn, In, Ce, Ru, Pd, Au, Pt, Rh, and the M2 is selected from Any one of Ni, Au, Pt or Pd. The CuO composite mesogenic catalyst modified by the atomic-level auxiliary agent of the present invention has excellent catalytic performance, is used for the hydrochlorination reaction of silicon powder and HCl as raw materials, and can realize the selectivity to trichlorosilane and silicon tetrachloride Synthesis is regulated, while reaction temperature and energy consumption are reduced, and product yield and silicon powder conversion rate are increased.

The invention discloses a testing method for the content of sulfate ions in sea sand. The testing method comprises the following steps: (1) taking the sea sand and sieving to obtain a sea sand sievedsubstance, i.e., a sea sand sample; (2) pre-treating the sea sand sample; (3) drawing a standard working curve; (4) carrying out ion chromatographic analysis and result calculation. According to the testing method disclosed by the invention, the sea sand sample is pre-treated by adopting ultrasound, vibration and centrifuging; the sulfate ions in the sea sand are sufficiently dissolved in a solvent through multi-effects of the ultrasound, the vibration and the centrifuging; operation steps are simple and rapid and the testing efficiency is high. The testing method takes inorganic acid as a solvent, so that the sulfate ions in the sea san are completely dissolved out; measurement errors are avoided and a testing result is real and reliable.