11results about How to "Good reversibility" patented technology

The application discloses a zinc battery negative electrode material, a preparation method thereof and a zinc ion battery. The zinc battery negative electrode material is a composite of a carbon base material and zinc nanoparticles; the carbon base material is a porous carbon material with through nano or sub-micron channels, the zinc nanoparticles are distributed in the channels of the carbon base material, the surface of the zinc nanoparticles is wrapped by a carbon network, and the carbon network anchors the zinc nanoparticles in the channels of the carbon base material. A pulse mode is adopted to alternately introduce zinc sources and carbon sources, and interval purging is performed after each introduction; in view of the unique physical and chemical characteristics of zinc, a synergistic process of "functional group guidance-pulse deposition-immediate anchoring" is designed, so that the deposition of zinc nanoparticles and the growth of the carbon network are alternately performed. The zinc battery negative electrode material can not only inhibit the growth of zinc particles in a long-term electrochemical cycle process, improve the utilization rate of zinc, but also reduce the direct contact area of zinc and electrolyte, and is helpful to inhibit the occurrence of side reactions such as hydrogen evolution.

This invention discloses an aluminum-containing heavy water-based electrolyte, its preparation method, and its applications. The electrolyte comprises a solvent and a solute. The solvent includes heavy water, a deuterated solvent, and a low-barrier hydrogen bond reconstructing agent. The solute comprises a main aluminum salt and an auxiliary monovalent metal salt. This electrolyte can construct low-barrier hydrogen bonds in solution by controlling the solvent composition, significantly reducing the activity of water in the solution, improving the electrochemical stability of the solution, and suppressing side reactions. Simultaneously, it improves the electrochemical reaction behavior of aluminum in the solution and at the electrolyte / electrode interface, which is beneficial for improving the electrochemical deposition efficiency of aluminum in aqueous solution.

This invention discloses a zinc battery anode material, its preparation method, and a zinc-ion battery. The zinc battery anode material is a composite of a carbon substrate and zinc nanoparticles. The carbon substrate is a porous carbon material with through-hole nano- or submicron pores. The zinc nanoparticles are distributed within the pores of the carbon substrate, and their surfaces are encapsulated by a carbon network, which anchors the zinc nanoparticles within the pores of the carbon substrate. A synergistic process of "functional group guidance—pulse deposition—instant anchoring" is designed, taking into account the unique physicochemical characteristics of zinc, to achieve alternating deposition of zinc nanoparticles and growth of the carbon network. This zinc battery anode material not only inhibits zinc particle growth and improves zinc utilization during long-term electrochemical cycling, but also reduces the direct contact area between zinc and the electrolyte, helping to suppress side reactions such as hydrogen evolution.

This invention discloses an integrated device for in-situ power generation and extraction of coal seam gas and its usage method, relating to the field of coal seam gas control and utilization technology. An underground in-situ installation mechanism is used for anchoring coal seam boreholes and includes a gas storage chamber. A gas pretreatment mechanism is located inside, performing multi-stage purification of the raw gas entering the storage chamber. An outlet pipe connects to the storage chamber. A first negative pressure generating mechanism is detachably connected to the outlet pipe, generating negative pressure in the storage chamber in a first operating mode. A mechanical extraction mechanism can replace the first negative pressure generating mechanism, switching to a second operating mode. A bidirectional electrochemical energy conversion mechanism is connected to the underground in-situ installation mechanism and the storage chamber; in the first operating mode, it generates electricity using high-concentration gas, and in the second operating mode, it produces methane using electrical energy. An integrated control system is electrically connected to each mechanism, coordinating operation according to a preset program or remote commands to achieve switching between the two operating modes and stable operation. This invention enables the coordinated operation of in-situ collection, power generation, and extraction of coal seam gas.

This invention discloses a P2-type NaCrFeTi layered oxide, which is obtained by high-temperature solid-state sintering using sodium carbonate, iron oxide, chromium oxide, and titanium dioxide as raw materials. 0.67 Cr 1 / 3 Fe 1 / 3 Ti 1 / 3O2 layered oxide NCFT-33 / 33; belonging to the P2 phase structure of the P63 / mmc space group; microstructure is a hexagonal prism structure with a particle size of 1-3 micrometers, exhibiting a single-crystal structure; the main phase content reaches over 95%. Its preparation method is a one-step sintering method, where raw materials are ball-milled and mixed according to the chemical formula ratio, followed by sintering and natural cooling. When used as a sodium-ion battery anode material, the reversible specific capacity is 60.00-80.00 mAh g. ‑1 When the number of cycles is 3000, the capacity retention rate is 91-93%, and the capacity loss rate per cycle is only 0.0023-0.0030%.

This invention discloses the preparation and application of a porous bismuth ferrite material. The preparation method includes the following steps: dissolving bismuth and iron salts in an acid solution to obtain a metal solution; adding a complexing agent and a pore-forming agent to the metal solution and mixing to obtain a precursor solution; heating the precursor solution to obtain a wet gel; drying the wet gel to obtain a dry gel; and calcining the dry gel under an inert atmosphere containing 6-10% oxygen to obtain the porous bismuth ferrite material. The porous bismuth ferrite electrode material of this invention not only solves the structural defects of traditional porous bismuth ferrite materials, such as small pore volume and insufficient utilization of active sites, but also fully utilizes its membrane capacitance characteristics and bimetallic synergistic effect, showing excellent application prospects in the field of capacitive deionization and chlorine removal.

This invention discloses a self-supporting cathode material, its preparation method, and its applications. The self-supporting cathode material includes a self-supporting substrate and a vanadium-based oxide layer loaded on the self-supporting substrate, wherein the vanadium-based oxide layer contains vanadium-based oxide nanofibers. When this self-supporting cathode material is used to prepare magnesium-lithium hybrid-ion secondary batteries, it exhibits high initial capacity, as well as excellent electrochemical performance such as good rate performance, cycle stability, and reversibility. The self-supporting cathode material provided by this invention is a high-performance magnesium-lithium hybrid-ion secondary battery self-supporting cathode material that can efficiently accommodate dual-ion co-intercalation and is expected to be widely used in the preparation of magnesium-lithium hybrid-ion secondary batteries.

The application provides a supercapacitor carbon and a preparation method thereof. The preparation method comprises the following steps: firstly, mixing petroleum coke and pitch uniformly to obtain a first material; then, carbonizing the first material under the condition of an oxygen-containing gas to obtain a second material; then, crushing the second material and mixing the second material with alkali to perform primary activation under an inert atmosphere to obtain a third material; then, washing and drying the third material, mixing the third material with pitch and alkali, and performing secondary activation under an inert atmosphere; finally, washing and drying to obtain the supercapacitor carbon. The supercapacitor carbon has mesopore-micropore two-stage pore channels, wherein the mesopore has a pore diameter of 2nm-5nm, and the micropore has a pore diameter of 0.4nm-2nm. The application realizes the short-range through-hole pore channel structure design of the petroleum-based porous material through a combined process, provides a large specific surface area for the formation of an effective double electric layer, guarantees the rapid transmission of electric charges, and significantly improves the long-period cycle stability of the material.

This invention belongs to the technical field of magnesium-ion battery anode materials, and relates to an alloy-type magnesium-ion battery anode material, its preparation method, and a magnesium-ion battery. The anode material is a magnesium alloy; based on the total weight of the magnesium alloy, the content of rare earth metal elements is 0.1-3 wt%, preferably 0.5-2 wt%, with the balance being magnesium; wherein the rare earth metal elements are lanthanide elements, preferably at least one selected from lanthanum, praseodymium, samarium, holmium, dysprosium, erbium, and ytterbium. Compared to pure magnesium anodes, the alloy material obtained by this method has a longer cycle life and lower overpotential, while also possessing advantages such as environmental friendliness, low cost, and simple processing, showing promising application prospects.

The application discloses a kind of zinc negative electrode PVA / porous carbon array protective layer femtosecond laser preparation method, zinc negative electrode material and its application, to solve zinc negative electrode dendrite growth, corrosion passivation, hydrogen evolution side reaction highlights and the problems such as existing protective layer preparation process is complex, structure regulation precision is low.The preparation method includes three steps: S1 PVA is mixed with deionized water, heated and stirred to form a semi-thick solution;S2 the solution is uniformly coated on the surface of zinc foil, and a PVA protective layer is formed after drying;S3 PVA protective layer is decomposed by femtosecond laser, and a porous PVA / porous carbon array composite protective layer is prepared.The composite protective layer enhances the interface stability through PVA, and the synergistic effect of porous carbon guiding zinc ion uniform deposition effectively inhibits dendrite growth and corrosion reaction.The application process is simple, raw materials are environmentally friendly and cost is relatively low, suitable for mass production, and provides key technical support for commercialization of aqueous zinc ion battery.

This invention belongs to the field of gas separation and carbon capture technology, specifically relating to a CO2 adsorbent suitable for treating hot flue gas, its preparation method, and its application, particularly suitable for the efficient capture and separation of CO2 in medium- and high-temperature industrial hot flue gas systems. The adsorbent is a ternary eutectic solvent, with 4-methylimidazole (4MI) as the first hydrogen bond acceptor, 3-aminopropanol (3AP) as the hydrogen bond donor, and monoethanolamine (MEA) as the second hydrogen bond acceptor; wherein the molar ratio of 4-methylimidazole (4MI) to 3-aminopropanol (3AP) is 1:3, and the mass of monoethanolamine (MEA) accounts for 20-40 wt% of the mass of the binary eutectic solvent composed of 4MI and 3AP. This invention solves the problem of decreased absorption capacity and inability to adapt to industrial hot flue gas scenarios of existing DES-type CO2 adsorbents at medium and high temperatures, achieving efficient CO2 capture in a temperature range of 20-100℃. Simultaneously, this adsorbent possesses characteristics of water resistance, good thermal stability, and excellent cycle performance, making it suitable for industrial applications.