34results about How to "Valence stable" patented technology

A catalyst including: a support, the support including a mixture of SiO2 and ZrO2; an active ingredient including copper; a first additive including a metal, an oxide thereof, or a combination thereof; and a second additive including Li, Na, K, or a combination thereof. The metal is Mg, Ca, Ba, Mn, Fe, Co, Zn, Mo, La, or Ce. Based on the total weight of the catalyst, the weight percentages of the different components are as follows: SiO2=50-90 wt. %; ZrO2=0.1-10 wt. %; copper=10-50 wt. %; the first additive=0.1-10 wt. %; and the second additive=0.1-5 wt. %.

The invention belongs to the technical field of nuclear fuel reprocessing and discloses a process for recovering and purifying neptunium from waste liquor discharged from 2AW+2DW in Purex flow. The process comprises the primary neptunium purification process and the secondary neptunium purification process; the process comprises the following steps: by taking 30 volume percent of TBP-kerosene as an extraction agent, extracting Np, U and Pu to the organic phase, and allowing the fission fragments to enter the aqueous phase; adding a reducing agent and an extraction agent into the organic phase, reversely extracting the Np to the aqueous phase; further extracting uranium and plutonium, and performing oxalate precipitation, filtering and calcining on the obtained aqueous phase product to obtain the purified neptunium oxide solid. The process has the advantages that the neptunium recovery rate is over 98 percent, and the uranium and plutonium removal coefficient in neptunium is high.

The invention relates to a rare-earth butyl rubber and a preparation method thereof. The rare-earth butyl rubber is a homopolymer prepared by using a rare-earth catalyst to catalyze isobutylene polymerization, or a copolymer prepared by catalyzing isobutylene-comonomer polymerization. The number-average molecular weight is 1-100*10<4>. The mol percent of the comonomer is 1-20%. The comonomer is selected from one or mixture of more of olefins and olefin derivatives, wherein the olefins are selected from alpha-olefins, conjugated olefins and cycloolefins; and the olefin derivatives are selected from alpha-olefin derivatives, conjugated olefin derivatives and cycloolefin derivatives containing nitrogen, oxygen, chlorine and bromine atom functional groups. The rare-earth catalyst comprises A and B, wherein A is rare-earth coordination compounds CpLnR2Xn, Ln is a rare-earth metal, and B is an organic boron reagent. The rare-earth catalyst has the advantages of high activity and stable valence state; the polymerization reaction can be competed at higher temperature; and thus, the method has the advantages of energy saving, high safety, long production cycle, no corrosion, no toxicity and environment friendliness.

The invention discloses an all-inorganic lead halide perovskite light-emitting diode, which comprises a conductive substrate, a carrier transport layer, an electrode modification layer and an electrode sequentially arranged in a layered structure, wherein the carrier transport layer is arranged in the middle The active luminescent layer is a lead halide perovskite in which part of the lead halide is replaced by an alkaline earth metal halide. In this application, part of the lead halide in the perovskite is replaced by alkaline earth metal. On the one hand, the formation energy of the bromine defect state in the perovskite becomes higher, which means that the bromine defect is more difficult to form, so the defect state of the perovskite is significantly reduced and the fluorescence is enhanced. On the other hand, the morphology of the film is significantly improved, the pores are reduced, and the leakage current is reduced. At the same time, due to the enhanced fluorescence, the brightness is improved, and finally the efficiency of the entire device is improved.

The invention relates to a high-performance perovskite cell and a preparation method thereof. The perovskite solar cell uses Fe prepared by a solution method. 2‑x Mg x O 3 The thin film is used as the interface passivation layer to passivate the adjacent interface of the perovskite photosensitive layer of the perovskite photovoltaic cell, where 0≤x≤0.2, and the thickness is 30-40 nm. The perovskite photovoltaic cell of the present invention uses Fe 2‑x Mg x O 3 For the interface passivation layer, the preparation cost of perovskite cells is greatly reduced, and the interaction between iron and iodine, oxygen and lead is used to improve the crystal quality of perovskite thin films. At the same time, Fe 2‑x Mg x O 3 The thin film can make the carriers move quickly and reduce the charge accumulation at the interface; an appropriate amount of magnesium can also form a strong chemical bond with the surrounding ions, stabilize the structure of the adjacent interface of the perovskite, reduce interface defects, and reduce non-radiative recombination. achieve the purpose of improving device performance.

The invention discloses a preparation method of an anode material of a lithium ion cell, comprising the following steps of: (1) uniformly dispersing a Li source, a Mn source, a Ni source, a doping element and a metal element with superionic conductor attributes to prepare a precursor, wherein the metal element with the superionic conductor attributes is selected from two or two more of Ti, La andZr; (2) drying or igniting the precursor, then carrying out pretreatment to obtain pretreatment powder; (3) pressing the pretreatment powder into a sheet; (4) carrying out heat treatment for 6-24h; and (5) annealing, naturally cooling to room temperature, grinding, and sieving to obtain the anode material. In the invention, on the one hand, a crystal skeleton of the material and a Mn valence state are stabilized by using the doping element, on the other hand, a compound lithium ion superionic conductor improves a migration rate of the lithium ion in the material and improves the multiplying power property and cycling property of an electrode are improved.

The invention belongs to the technical field of lithium ion batteries, and particularly relates to a preparation method and application for a vanadium trioxide negative electrode material. The preparation method for the vanadium trioxide negative electrode material comprises the steps that an ammonium vanadate compound is taken as a precusor substance, a silicon wafer is taken as a carrier, a lithium sheet is taken as a reducing agent, the above substances are placed in a crucible and is calcined in a tube furnace, the above substance is cooled to the indoor temperature naturally, and a V2O3 negative material is obtained. The preparation method is simple and feasible, the production cost is low, and the safety coefficient is high; the prepared V2O3 negative material is of a multi-level structure, and material shape can be controlled. In addition, the prepared V2O3 negative material is used for assembling a half cell, the result shows that the V2O3 negative material is high in specificcapacity, good in rate capability and stable in circular performance. The prepared V2O3 material is taken as the negative material to produce lithium ion batteries and has a wide application prospect.

The invention discloses a laminated magnetic conductive plate raw material composition and a production method for manufacturing a modified laminated magnetic conductive plate by utilizing the laminated magnetic conductive plate raw material composition. The laminated magnetic conductive plate raw material composition is a mixer of epoxy resin, iron powder, nano neodymium oxide and a silane coupling agent KH550, wherein the weight ratio of the epoxy resin, the iron powder, the nano neodymium oxide and the silane coupling agent KH550 is 10:2:0.5:0.13, and the proportion of the diluted epoxy resin is 50%. The problem that the iron powder in the laminated magnetic conductive plate on the market is large in proportion, easily precipitates in an epoxy resin solution and is difficult to evenly disperse, and accordingly the magnetic flow rate of the laminated magnetic conductive plate is unstable is solved. The problem that the iron powder is used for a long period of time or is easily oxidized after used in a high-temperature motor, and accordingly the magnetic conductance of the laminated magnetic conductive plate is reduced remarkably is solved.