30results about How to "Facilitates ion diffusion" patented technology

The invention relates to application of a high-performance supercapacitor electrode material Co-Fe-type Prussian blue nanocube, and belongs to the technical field of electrode material preparation. With inorganic cobalt salt and potassium ferricyanide as reaction raw materials and trisodium citrate as a complex stabilizer, by adopting a liquid-phase co-precipitation reaction method and controllingreaction conditions such as the dosage of potassium ferricyanide and the standing and aging time, the Co-Fe-type Prussian blue nanocube material with high dispersibility and a large specific surfacearea is prepared, and the size of the material is about 300 nm. By means of the prepared Co-Fe-type Prussian blue nanocube material, the capacity of electrochemical capacitors is increased, the rapidcharge and discharge performance and other performance of the capacitors are improved, the service life of the capacitors is prolonged, the capacitance value is up to 447 F / g when constant-current charge and discharge with the current of 5 A / g are achieved in a 1 mol / L sodium sulfate solution, and the material has good rate performance.

The present disclosure generally relates to a method for electroplating (or electrodeposition) a transition metal oxide composition that may be used in gas sensors, biological cell sensors, supercapacitors, catalysts for fuel cells and metal air batteries, nano and optoelectronic devices, filtration devices, structural components, and energy storage devices. The method includes electrodepositing the electrochemically active transition metal oxide composition onto a working electrode in an electrodeposition bath containing a molten salt electrolyte and a transition metal ion source. The electrode structure can be used for various applications such as electrochemical energy storage devices including high power and high-energy primary or secondary batteries.

The present invention discloses a tellurium-doped MXene composite material and a preparation method thereof, comprising the following steps: (1) adding MXene and a tellurium source into a dispersant to prepare a dispersion, and then stirring the dispersion; (2) heating the dispersion, reacting, and then cooling; (3) centrifuging the product obtained in the step (2), then washing and drying under vacuum; and (4) placing the dry product obtained in the step (3) into a corundum ark, and then transferring into a tubular furnace, heating under the protection of inert gas, retaining the temperature, and then cooling to obtain the tellurium-doped MXene composite material. The composite material prepared by the present invention can be used as a cathode of a potassium ion battery, which increases the interlamellar spacing, and optimizes an ion diffusion channel, so that the electrochemical performance of the potassium ion battery is improved.

The present invention relates to an anode for a secondary battery, comprising at least two anode wires which are parallel to each other and spirally twisted, each of the anode wires having an anode active material layer coated on the surface of a wire-type current collector; and a secondary battery comprising the anode. The anode of the present invention has an increased surface area to react with Li ions during a charging and discharging process, thereby improving the rate characteristics of a battery, and also release stress or pressure applied in the battery, e.g., the volume expansion of active material layers to prevent the deformation of the battery and ensure the stability thereof, thereby improving the life characteristic of the battery.

A zeolite-modified cement combined with a chromium-containing corundum castable and a preparation method thereof relate to a castable and a preparation method thereof. The purpose is to solve the existing Cr-containing calcium aluminate cement as a binder. 2 O 3 Refractory castables are easy to cause environmental pollution problems. The castable is composed of tabular corundum fine powder, active α-Al 2 O 3 It is prepared from micro powder, fine chromium oxide powder, calcium aluminate cement, zeolite powder, polycarboxylate dispersant and tabular corundum particles. Preparation method: weighing raw materials and mixing to obtain a premix, adding water and stirring to obtain a wet mix, pouring and vibrating the wet mix, and finally performing curing, drying and heat treatment in sequence. The zeolite powder in the invention can control the migration and diffusion of metal ions, inhibit the formation and leaching of Cr(VI) compounds, and realize green and environmental protection production; meanwhile, the sintering and densification of the castable is promoted, and the mechanical properties of the chromium-containing castable are significantly improved. and resistance to slag erosion. The invention is suitable for preparing chromium-containing castables.

The invention relates to an Alpha-phase manganese dioxide nano-rod, and a preparation method and the application thereof, and belongs to the technical field of electrode material preparation. The preparation method is characterized in that by taking potassium permanganate as an oxidizing agent, and inorganic manganese salt as a reducing agent, adopting an atmospheric pressure reflux reaction method, adding additives and controlling reaction conditions such as the use amount of the additives, the reflux time, and the like, Alpha-phase manganese dioxide nano-rod with high dispersity and a large specific surface area are prepared, wherein the nano-rod is 50 to 100nm in diameter and 0.5 to 2 micron m in length. By adopting the scheme, the Alpha-phase manganese dioxide nano-rod with high crystallinity can be prepared, the capacity of an electrochemical capacitor is increased, and the performance of quick charge-discharge, service life, and the like of the electric capacitor are improved.

The invention discloses a rechargeable magnesium battery and a preparation method thereof. The rechargeable magnesium battery comprises an anode, a magnesium metal cathode, electrolyte, and a diaphragm arranged between the anode and the cathode, wherein active substance of the anode contains iodine; the electrolyte contains magnesium salt. By selecting the active material anode containing iodine and an electrolyte system containing magnesium salt and taking metal magnesium as a cathode, the rechargeable magnesium battery obtains high specific capacity, can realize reverse charging and discharging, and has a higher discharge platform (2.0Vvs.Mg / Mg2+). The rechargeable magnesium battery has the characteristics of high energy density, long service life and better safety. The technical process of the rechargeable magnesium battery is easy to control, and rechargeable magnesium battery has a good industrialization prospect.