14results about How to "Cyclic stability" patented technology

The invention discloses a process for preparing a V2O3 / ZnV2O3 total battery by simultaneously using vanadium oxide in a zinc ion battery as a positive electrode material and a negative electrode material, which comprises the following steps: reacting ammonium metavanadate with absolute ethyl alcohol by adopting a solvothermal synthesis method, washing, drying, and calcining in a tubular furnace to obtain V2O3; in the preparation process of the V2O3 positive electrode material, only V2O3, acetylene black serving as a conductive agent and PVDF serving as a binder are mixed in proportion and then are coated on graphite paper, other coating protection materials do not need to be introduced into a V2O3 / Zn negative electrode, and V2O3 is used as a protection layer to inhibit growth of zinc dendrites, relieve hydrogen evolution side reaction of the zinc negative electrode and reduce corrosion of zinc. Vanadium oxide V2O3 is directly used as a core positive electrode material, the zinc negative electrode coating is developed by utilizing the characteristics of the vanadium oxide V2O3, a material is formed, meanwhile, the performance optimization of the positive electrode and the negative electrode is realized, the used raw materials are simple and easy to obtain, the process is simple and easy to implement, and the preparation process is simple and easy to implement from V2O3 raw material synthesis to positive and negative electrode piece preparation to V2O3 / ZnV2O3 total battery assembly. And comprehensive improvement of positive and negative electrode performances of zinc ions is simultaneously realized by a single material.

This application relates to the field of energy storage materials technology, and more particularly to a titanium-based active material, its preparation method, and its application. The titanium-based active material comprises a mixed oxide having a layered perovskite structure, the mixed oxide having the general chemical formula shown in Formula 1, M... 2± a La x‑y M1 y B n‑z M2 Z O (3n+1)‑δ Q δ Formula 1; in Formula 1, the M site includes H and / or an alkali metal element; the M1 site includes at least one of Mg, Ca, Sr, Ba, and rare earth elements; the M2 site includes a specified transition element and at least one of Al, Ga, In, Si, Sn, Sb, and Bi; the Q site includes at least one of F, Cl, Br, I, N, and S; the B site satisfies: Nb 2n‑3x‑z Ti 3x‑n Or Nb 2n‑3x Ti 3x‑n‑z This titanium-based active material possesses high energy density, ultra-fast charging capability, long cycle life, and intrinsic safety.

This invention belongs to the field of flow battery energy storage technology, and relates to a negative electrode electrolyte for alkaline all-iron flow batteries and its preparation method. The negative electrode electrolyte is prepared from iron salts, a complexing agent, a promoting component, an alkaline component, an auxiliary electrolyte, and water. The total iron concentration is 0.1–2.0 mol / L, the molar ratio of the complexing agent to the iron salt is 1.5–4, the molar ratio of the promoting component to Fe is 0.05–1.0, the alkaline component concentration is 2.0–6.0 mol / L, and the auxiliary electrolyte concentration is 0–2.0 mol / L. The negative electrode electrolyte of this invention for alkaline all-iron flow batteries has a high total iron concentration, which not only avoids the precipitation of elemental iron during charging and discharging, but also effectively prevents the formation of ferric hydroxide precipitate, improves the stability of iron ions, and greatly extends the cycle life of the negative electrode electrolyte. It can be widely used in aqueous alkaline all-iron flow batteries.

The application discloses a composite lithium-magnesium alloy negative electrode and a preparation and application thereof. After a fluorinated copolymer solution is uniformly loaded on the surface of a three-dimensional conductive framework, the three-dimensional conductive framework is combined with a lithium-magnesium alloy foil in a sandwich arrangement mode, and then the combination is obtained through mechanical rolling. The three-dimensional conductive framework material effectively reduces the size of the local current density, and can also provide sufficient accommodation space for the deposition of metal lithium. The elastic self-adaptive interface rich in LiF formed by using the fluorinated copolymer can accelerate the ion transmission at the interface and maintain the stability in a long cycle process. The lithium-magnesium alloy with the lithium affinity induces the uniform deposition of lithium ions, and the growth of dendrites is inhibited, so that the composite lithium-magnesium alloy negative electrode material with the fluorine-rich lithium elastic self-adaptive interface is constructed.

This invention discloses a wide-temperature-range, long-life sodium-ion battery electrolyte, its preparation method, and its applications. The invention uses sodium perchlorate as the sodium salt, synergistically with low-viscosity, low-melting-point methyl acetate to ensure high ionic conductivity of the electrolyte over a wide temperature range. Simultaneously, dimethyl sulfite and fluoroethylene carbonate synergistically construct an inorganic-rich SEI film, significantly improving interfacial stability and cycle performance. The Na||NVP battery, after reversible charge-discharge at 60°C, maintained a discharge specific capacity retention of 88.33% of the initial capacity after 400 stable cycles. Under low-temperature conditions, reversible charge-discharge at currents of 0.1C and 0.3C resulted in stable cycles of 300 and 380 cycles, respectively. The preparation method of this invention is simple, low-cost, easy to implement, requires minimal equipment investment, and is suitable for mass production.

The invention relates to a high-voltage solid-state polymer battery based on thermodynamic and dynamic regulation and control as well as a preparation method and application thereof. The high-voltage solid-state polymer battery comprises a positive electrode, a negative electrode and a solid-state polymer electrolyte, the solid-state polymer electrolyte is of a double-layer structure and comprises a positive-electrode-side solid-state polymer electrolyte and a negative-electrode-side solid-state polymer electrolyte; the negative electrode side solid polymer electrolyte comprises a polymer, a first metal salt and an inorganic filler; the positive electrode side solid polymer electrolyte comprises an oligomer and a second metal salt; the working temperature of the solid polymer electrolyte is 40-60 DEG C; according to the high-voltage solid-state polymer battery, electrolyte ion conduction, electrode interface stability and electrode material structure stability are regulated and controlled through thermodynamic and dynamic regulation and control, so that the solid-state battery has excellent cycle performance and high-voltage stability; the invention provides a new thought for the development of high-energy-density and high-safety solid-state batteries.

The application relates to a secondary zinc ion battery and a method for improving the coulomb efficiency and stable long cycle performance of a zinc negative electrode, which realizes the high coulomb efficiency of the zinc negative electrode of the zinc ion battery under large current and long cycle by the synergistic effect of zinc negative electrode surface modification and electrolyte additives, the surface modifier is a metal halide, is dissolved in a polar organic solution, and the electrolyte comprises a zinc salt, a metal ion additive and a solvent. Compared with the prior art, the cycle performance of the zinc negative electrode and the deposition morphology of zinc are significantly improved by the synergistic surface alloying and electrolyte additive, and the zinc negative electrode has excellent zinc deposition morphology and very high metal coulomb efficiency under a relatively high current density and discharge depth.

The application relates to the technical field of battery positive electrode materials, in particular to a synergistically modified high-voltage positive electrode material and a preparation method and application thereof, which comprises a bulk particle, a doped layer coated on the surface of the bulk particle and a coating layer coated on the surface of the doped layer; the bulk particle comprises lithium nickel cobalt manganese oxide; the doped layer is lithium nickel cobalt manganese oxide doped with fluorine elements in a bulk phase; and the coating layer comprises a lithium fluoride coating layer and lithium nickel cobalt manganese titanium oxide particles embedded in the lithium fluoride coating layer. The preparation method comprises the following steps: firstly, a nickel cobalt manganese hydroxide precursor is prepared by adopting a coprecipitation method; then, a doped layer and a coating layer are synthesized on the surface of the nickel cobalt manganese hydroxide precursor by adopting a solvothermal method; finally, calcination treatment is carried out to obtain the synergistically modified high-voltage positive electrode material. The synergistic modification strategy of bulk phase doping and surface coating effectively guarantees the stability of the interface and bulk structure, the preparation process is simple, and the electrochemical performance of the positive electrode material under high voltage, high cycle, high rate or high-temperature environment is improved.

The utility model discloses a kind of high sealing heat pump drying devices, including heat exchanger, cover body and air pipe assembly, cover body is equipped with heat exchange cavity, heat exchanger is installed in heat exchange cavity, and heat exchange cavity is divided into first cavity section and second cavity section by heat exchanger. Cover body includes first shell and second shell, first shell and second shell mutually link in a circumferential direction, and are enclosed to form heat exchange cavity. First shell and second shell are sealedly connected by first sealing element;First shell and second shell are equipped with heat preservation layer on;Air pipe assembly includes two air pipes, one air pipe is communicated with first cavity section, and another air pipe is communicated with second cavity section. The first shell and second shell outside the heat exchanger are sealedly linked by first sealing element, and heat preservation layer is equipped on two shells, reduce the loss caused by the leakage of heat energy in cavity due to gap, improve heat exchange efficiency;Meanwhile, it can also effectively reduce the risk of waste gas overflow from the gap of shell link.

This utility model discloses a wastewater concentration device for an analytical reactor, comprising a first-effect falling film evaporator, a second-effect falling film evaporator, and a third-effect falling film evaporator. The input side of the first-effect falling film evaporator is equipped with a raw liquid tank. A first-stage plate heat exchanger is installed between the raw liquid tank and the first-effect falling film evaporator. A second-stage plate heat exchanger is installed between the first-effect and second-effect falling film evaporators. A distilled water tank is installed between the second-effect and third-effect falling film evaporators. This device achieves stable circulation of materials throughout the plant, improves resource utilization, reduces costs and increases efficiency, and promotes cleaner production. It empowers green transformation and lays a solid foundation for the company to create a core competitive advantage for its cyanuric chloride products.

The application discloses a lithium ion battery diaphragm with thermal stability and a preparation method thereof, and belongs to the technical field of lithium battery diaphragms. The method comprises the following steps: polyvinylidene fluoride is stirred and mixed in N-methyl pyrrolidone to obtain a preliminary slurry; boehmite powder is placed in the preliminary slurry, stirred and mixed, and ultrasonic treatment is conducted to obtain a final slurry; the final slurry is scraped and coated onto a glass plate and dried to form a shape; and the dried coating layer is peeled off from the glass plate to obtain the lithium ion battery diaphragm. The application can simply and economically obtain a novel diaphragm for a lithium ion battery and is easy to be mass-produced industrially. The diaphragm has effectively improved thermal stability, can effectively inhibit the thermal runaway risk of a lithium ion battery in the case of fire and the like, and reduces personnel casualties and property losses.

The utility model relates to the field of big horsepower tractor, more particularly to a kind of tractor expansion space arrangement structure and tractor, it includes: main use expansion water tank and standby expansion water tank, respectively set in the different height of tractor and main use expansion water tank higher than standby expansion water tank;Overflow pipe, overflow port is set in the top of main use expansion water tank, one end of overflow pipe is connected with main use expansion water tank, and the other end is communicated with standby expansion water tank;Wherein, water inlet is set on main use expansion water tank, water inlet is connected with engine water tank by water pipe, for receiving the cooling liquid overflow when engine water tank expansion.It can effectively solve the contradiction between the expansion space demand of big horsepower tractor and the limited space of whole machine, improve the heat dissipation reliability of engine, optimize space layout, reserve more space for other components arrangement of tractor, improve the overall performance and reliability of tractor.

This invention belongs to the field of new energy storage materials technology, specifically relating to a method for preparing and applying an ultrathin copper current collector modified with a carbon nanotube composite coating. Addressing the problems of strong lithium repellency, uneven metal deposition, and short cycle life of copper current collectors in electrodeless lithium-ion batteries, this invention constructs a composite functional layer on an ultrathin copper foil, composed of zinc-based oxide rich in oxygen vacancies and carbon nanotubes. In this coating, the zinc-based oxide acts as a highly lithium-affinity site, effectively reducing the metal nucleation overpotential; the carbon nanotube network provides a rapid electron conduction path and alleviates deposition stress. The preparation process is environmentally friendly, employing an aqueous slurry system and a simple heat treatment process. This modified current collector, used in electrodeless lithium-ion batteries, can guide uniform and dense metal deposition, significantly improving the battery's coulombic efficiency and cycle stability.

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.