27 results about "Lithium.free" patented technology

The invention discloses lithium-free high-heat-resistance ceramic pug and a preparation method thereof, and relates to the technical field of ceramic materials. When the lithium-free high-heat-resistance ceramic pug is prepared, aluminum oxide reacts with 3-(2, 3-epoxypropoxy) propyltrimethoxysilane to prepare pre-modified aluminum oxide; reacting the pre-modified aluminum oxide with starch to obtain modified aluminum oxide; mixing ethyl acetoacetate, isopropanol, zirconium oxychloride, aluminum sec-butoxide, polyvinylpyrrolidone and N-N dimethylformamide to prepare a spinning solution, performing electrostatic spinning, and then immersing the spinning solution into the yttrium oxide sol to prepare aluminum oxide-zirconium oxide-yttrium oxide composite fibers; stirring and mixing the modified aluminum oxide, talc, aluminum oxide-zirconium oxide-yttrium oxide fibers, hydroxypropyl methyl cellulose, glycerol, oleic acid, polyethylene glycol and water, and performing vacuum pugging to obtain the lithium-free high-heat-resistance ceramic pug. The lithium-free high-heat-resistance ceramic pug prepared by the invention has good thermal shock resistance and bending strength after being sintered.

The application discloses a lithium-free high-heat-resistant ceramic mud and a preparation method thereof, and relates to the technical field of ceramic materials. In the preparation of the lithium-free high-heat-resistant ceramic mud, alumina is reacted with 3-(2,3-epoxypropoxy) propyl trimethoxysilane to obtain pre-modified alumina; the pre-modified alumina is reacted with starch to obtain modified alumina; ethyl acetoacetate, isopropyl alcohol, zirconium oxychloride, aluminum sec-butoxide, polyvinylpyrrolidone and N-N dimethylformamide are mixed to form a spinning solution, the spinning solution is electrospun, and then immersed in yttrium oxide sol to obtain alumina-zirconia-yttria composite fibers; the modified alumina, talc, alumina-zirconia-yttria fibers, hydroxypropyl methyl cellulose, glycerol, oleic acid, polyethylene glycol and water are stirred and mixed, and vacuum pugging is carried out to obtain the lithium-free high-heat-resistant ceramic mud. The lithium-free high-heat-resistant ceramic mud prepared by the application has good thermal shock resistance and bending strength after sintering.

This invention discloses a lithium-free anode, its preparation method, and a solid-state battery. The lithium-free anode consists of a three-layer structure: the first layer is a copper current collector; the second layer is an active material layer coated on the current collector, inducing uniform lithium deposition; the third layer is a polymer fiber film deposited on the active material layer using electrospinning technology, serving as a physical barrier and flexible buffer layer to suppress lithium dendrite penetration and adapt to volume changes. This invention fundamentally solves the problems of lithium dendrite growth, volume effect, and interface instability inherent in traditional lithium-free anodes through the synergistic effect of the active material layer and the electrospinned polymer fiber film layer. The anode preparation process is simple and cost-controllable. When applied to lithium-ion batteries, it can significantly improve the electrochemical performance of the battery, and is particularly suitable for high-energy-density energy storage applications.

The application discloses a kind of composite electrode material and preparation method thereof, which belong to lithium-free negative electrode battery technical field.The composite electrode material of the application includes electrode current collector, conductive carbon layer and polymer layer, the conductive carbon layer is located between the electrode current collector and the polymer layer, and the conductive carbon layer includes large particle porous carbon with particle size not less than 50 μm.The composite layer of polymer layer and conductive carbon layer is used as the modification layer of current collector, the polymer layer can effectively improve the lithium affinity of material, and optimize the deposition behavior of lithium ion;The conductive carbon layer of large particle porous carbon introduced between polymer layer and current collector can significantly improve the stability of polymer layer to prevent the structure collapse of polymer layer, improve the stability of electrode structure, and also can improve the conductive area of electrode conductive interface, effectively improve the wetting performance of electrolyte and reduce the surface current density of battery, and then enhance the stability and cycle life of battery.

A method of forming a lithium-free glass article includes thermally treating the glass article to impart a fictive temperature and ion exchanging the thermally treated glass article. The thermal treatment includes heating the glass article to a hold temperature from 130 °C below to 20 °C above an annealing point of the glass article; holding the glass article at the hold temperature for a hold period; cooling the glass article at a first cooling rate from the hold temperature to an intermediate temperature; and cooling the glass article at a second cooling rate from the intermediate temperature to room temperature. The ion exchanged glass article includes a compressive stress greater than or equal to 900 MPa, as measured for an article having a thickness of 1.1 mm; and a warp less than or equal to 0.3 mm, as measured for an article having a length less than 200 mm.

The invention discloses a lithium-free high-voltage direct-output sodium ion capacitor energy storage device and a preparation method thereof, and belongs to the technical field of electrochemical energy storage devices. The energy storage device adopts a completely lithium-free system, a 50-380-layer internal series connection structure is formed through alternate lamination of double-side heteropole composite electrodes and diaphragms, direct output of high voltage of 1200 V or above is directly achieved, and direct power grid direct hanging can be achieved. The preparation method perfectly reuses the whole set of core processes of S01 to S03, and does not need to add new equipment. The energy density of the whole pack can reach 35-40 Wh / kg, the cost of raw materials is reduced by 40% or above compared with that of a lithium ion capacitor, dependence on lithium resources is thoroughly eliminated, the cycle life is longer than or equal to 120 thousand times, and the requirements of scenes such as power grid area energy storage, new energy grid connection and industrial standby power supplies are perfectly met.

A lithium-free transparent spinel glass ceramic and preparation method therefor and use thereof. The lithium-free transparent spinel glass ceramic is prepared from a base glass by heat treatment, and a spinel crystal is the main crystalline phase. The composition of the glass ceramic comprises the following oxides in mol%: SiO2 38.00 to 48.00 mol%, Al2O3 25.50 to 30.00 mol%, ZrO2 3.00 to 5.00 mol%, MgO 5.00 to 8.00 mol%, ZnO 8.00 to 14.00 mol%, Na2O 7.20 to 14.00 mol%, B2O3 3.00 to 8.00 mol%, K2O 0 to 2.00 mol% and Y2O3 0 to 1.00 mol%, and is substantially free of Li2O. The lithium-free transparent spinel glass ceramic does not use high-cost lithium, and can achieve excellent surface stress characteristics and deep-layer stress characteristics through chemical strengthening, thereby obtaining an excellent drop resistance performance.

This invention discloses a lithium-free high-voltage direct-output potassium-ion capacitor energy storage device and its preparation method, belonging to the field of electrochemical energy storage device technology. This energy storage device adopts a completely lithium-free potassium salt system, with potassium resources exceeding 1000 times that of lithium, completely eliminating the bottleneck of lithium resources. It achieves a direct output of high voltage above 1000V by alternately stacking dual-sided heteropolar composite electrodes and a separator to form an internal series structure of 50-300 layers. Its preparation method perfectly reuses the complete set of core processes for dual-sided heteropolar composite electrode preparation, non-destructive transfer and positioning stacking, and edge full-encapsulation insulation, requiring no additional equipment. The raw material cost of this invention is more than 20% lower than that of sodium-ion capacitors, the overall energy density can reach 40-45Wh / kg, and the cycle life is ≥100,000 cycles, making it an extremely low-cost solution for next-generation large-scale grid energy storage and new energy consumption scenarios.

The application discloses a low-cost lithium-free microcrystalline glass and a preparation method and application thereof, and belongs to the technical field of electronic cover plate materials. The microcrystalline glass takes pre-melted micro-powder of sodium feldspar 69-75% and in-situ synthesized micro-powder of calcium feldspar as main raw materials, is supplemented with a ZrO2 / TiO2 composite crystal nucleus agent 2.1-4.5%, and a small amount of MgO, CaO and K2O performance adjusting groups. The microcrystalline glass is obtained by two-stage melting at 1430-1480 DEG C in a weak reduction-neutral atmosphere, overflow down-draw forming, gradient annealing, two-stage crystallization at 650 DEG C nucleation and 735-770 DEG C crystallization, and K + / Na + ion exchange strengthening, and has high transmittance, high surface compressive stress, high hardness and excellent drop resistance. The application discards lithium resources and high-purity alumina, reduces raw material cost and energy consumption, and is suitable for electronic device cover plates such as smart phones.

The present application relates to the technical field of secondary batteries. Disclosed are a lithium metal electrode modified with an artificial solid electrolyte interface (ASEI) layer, a preparation method therefor and the use thereof, and a lithium metal battery. In the lithium metal electrode provided by the present application, the surface of lithium metal is modified with an ASEI layer, and the ASEI has the characteristic of a high-density grain boundary structure. In the present application, the ASEI having a high-density grain boundary structure is constructed on the surface of lithium metal, and by increasing the density of a grain boundary to accelerate the transfer speed of lithium ions, increase the ionic conductivity of the surface of the lithium metal and reduce the impedance of the ASEI, energy consumption caused by the lithium ions crossing the grain boundary can be effectively avoided, and more uniform deposition of the lithium ions can be induced, thereby inhibiting the growth of dendrites; therefore, the charging and discharging requirements of a high-rate lithium-dendrite-free lithium metal battery are met, and the cycle life is prolonged.

The invention discloses a flexible lithium-free metal negative electrode current collector based on bimetal active site regulation and a preparation method thereof, and belongs to the technical field of lithium-free metal battery negative electrode current collector materials. The current collector is a flexible carbon nanofiber three-dimensional skeleton with CoNi bimetallic alloy active site in-situ regulation and control, CoNi alloy nanoparticles are uniformly dispersed in the interior and on the surface of the fiber, and the skeleton has a micro / mesoporous hierarchical porous structure, is rich in pyrrole nitrogen and Co / Ni-Nx coordination bonds, and has excellent lithium affinity, flexibility and mechanical stability. A composite precursor membrane is obtained through electrostatic spinning, and in-situ construction of CoNi bimetallic active sites and carbon nanofiber skeleton forming are achieved through pre-oxidation and carbonization. The current collector does not need an additional metal support, can be directly used as a lithium-free metal negative electrode current collector, guides lithium metal to be uniformly and compactly deposited, and effectively inhibits dendritic crystal growth and volume expansion. The lithium metal battery applying the current collector shows excellent electrochemical performance and has important application value in the field of high-energy density energy storage.

The invention discloses a novel high-stability lithium-free negative electrode current collector and a preparation method thereof.The preparation method of the novel high-stability lithium-free negative electrode current collector comprises the steps that a metal zinc layer is deposited on the surface of a nickel material current collector through vacuum thermal evaporation, and then in-situ alloying treatment is conducted under argon protection to form a zinc-nickel alloy layer; and obtaining the zinc nickel-nickel composite current collector with the vertical nano array structure. The zinc-nickel nano-particles uniformly distributed on the surface of the current collector show excellent lithium-loving characteristics, have a strong adsorption effect on electrolyte anions, and synergistically promote formation of an interface layer rich in lithium fluoride. The capacity retention rate of a lithium-free total battery assembled by pairing the current collector and a high-nickel ternary positive electrode reaches 89.6% after 100 cycles, and the energy density breaks through 400 Wh kg <-1 >. The problem of cyclic pulverization of a traditional lithium-loving metal layer is effectively solved through a surface alloying strategy, and a key technical support is provided for practicability of a high-energy-density lithium metal battery.

The invention discloses a gradient composite interface structure for a lithium-free negative electrode of an all-solid-state battery as well as a preparation method and application of the gradient composite interface structure, and belongs to the technical field of all-solid-state batteries. The structure sequentially comprises a modified negative electrode current collector layer, a nano silicon-based middle layer and a solid electrolyte layer. Wherein the nanometer silicon-based intermediate layer is of a porous structure, and can be subjected to an in-situ alloying reaction with lithium in the first charging process of the battery to generate a stable interface layer rich in lithium-silicon alloy. The structure integrates multiple functions of in-situ interface construction, three-dimensional space guided deposition, ion conduction enhancement, mechanical stress buffering and the like, uniform deposition of lithium metal can be effectively promoted, dendritic crystal growth is inhibited, and interface chemical and mechanical stability in the long-term circulation process is maintained. The preparation process is mature, and a reliable solution is provided for developing an all-solid-state lithium-free negative electrode battery with high energy density and high safety.

A lithium-free secondary battery is provided. The lithium-free secondary battery includes an anode, an electrolyte, a separator, and a cathode, the anode comprising an anode plate composed of an anode current collector and an insulating layer formed in contact with the anode current collector in a predetermined width along the outermost side of the anode current collector, and is capable of suppressing non-uniform growth of lithium metal layer from the anode at the time of charge and discharge and thereby providing improved safety and capacity retention rate.

The invention belongs to the technical field of lithium battery electrolytes, and discloses a microemulsion gel electrolyte, a preparation method thereof and a solid-state lithium battery, the microemulsion gel electrolyte is composed of a continuous phase (a solvent, a double lithium salt solute, a monomer and an initiator), an insoluble phase (a perfluorinated compound) and an amphiphilic phase (a fluorine-containing ether compound), the three phases form the microemulsion gel electrolyte with a three-dimensional network structure through microemulsion and thermal polymerization, the process is simple, and large-scale production is easy to realize. According to the electrolyte, fluorine-containing micelles are driven by liquid-liquid interfacial tension to spontaneously migrate to an electrode interface to form a LiF-rich protective layer, and meanwhile, monomers are initiated to directionally polymerize to construct a three-dimensional network structure. Through the synergistic effect, a stable interface under the ultralow electrolyte dosage (0.9 g / Ah) is achieved, the lithium-rich manganese-based positive electrode is matched to assemble a lithium-free negative electrode battery, the energy density reaches up to 698.20 Wh / kg, meanwhile, excellent safety performance is shown, and fire and smoke do not occur in an acupuncture test.

The application discloses a metal organic sulfide (MOSB) positive electrode active material, a preparation method and a lithium-free secondary battery, and belongs to the technical field of new energy secondary batteries. The MOSB material is formed by a plurality of metal ions, an organic ligand and sulfur through a covalent bond to form a stable lattice structure, and the lattice sulfur fixation form can eliminate the polysulfide shuttle effect. The MOSB material can directly participate in an electrochemical reaction as an independent positive electrode active material, the volume expansion rate is less than 5% in a 2.0-3.5V charge-discharge interval, and the intrinsic conductivity is greater than or equal to 10-3 S / cm (four-probe method, 25 DEG C). The lithium-free secondary battery based on the MOSB material is composed of the MOSB positive electrode, a lithium-free negative electrode, a sulfur-tolerant electrolyte and a functional separator. The lithium-free secondary battery does not contain lithium, cobalt and nickel elements in the whole battery system, has a voltage platform of 2.8-3.3V, an energy density of 300-500 Wh.kg-1, a cycle life of greater than or equal to 2000 times at a 1C rate, and no combustion and explosion risk under extreme working conditions. The application is free from the dependence on rare and precious metals, has low cost and excellent cycle stability, and has the potential for engineering production.

The invention discloses a lithium-free negative electrode, a preparation method and an all-solid-state lithium-free negative electrode battery. The lithium-free negative electrode comprises a carbon-coated copper foil, a first material layer and a second material layer, the first material layer and the second material layer are sequentially arranged on the carbon-coated copper foil, the first material layer is a compact metal layer, the second material layer is an in-situ conversion functional layer, and the component of the in-situ conversion functional layer is one of LiPON, MgO, Al2O3, ZnO, SnO2 and NiO; and the metal in the compact metal layer is one of Mg, A1, Zn, Sn, In and Ti. According to the lithium-free negative electrode for the all-solid-state battery, the in-situ conversion functional layer and the compact metal layer of the lithium-free negative electrode have a synergistic effect, highly reversible deposition and stripping of lithium are jointly realized through multiple mechanisms of guiding uniform nucleation, constructing a rapid ion channel, stabilizing interface chemistry and the like, and formation of dead lithium is greatly reduced; therefore, the coulombic efficiency, the rate capability and the cycle life of the lithium-free negative electrode battery are remarkably improved.

The application belongs to the technical field of secondary batteries, and particularly relates to a transition metal-based inorganic filler regulated Ag-C composite material, and further discloses a preparation method thereof and an application of the preparation method in preparing a solid-state battery negative material. The Ag-C composite material containing the transition metal-based filler is prepared by in-situ synthesis of Ag, C and a layered metal filler containing a transition metal element, to form the transition metal filler regulated Ag-C composite material, which can effectively improve uniform deposition of lithium on a current collector, so that a lithium-free anode solid-state battery is verified at a high rate, and safety and rate capability of the solid-state battery in long cycle are improved.

Anodes having a laminate comprised of a lithium metal having adhered thereto a layer comprised of a thermoset polymer may be formed by contacting a lithium foil with an addition monomer to form an uncured layer and polymerizing the addition monomer forming a layer of a thermoset polymer adhered to the lithium metal foil or by contacting a metal foil other than lithium with an addition monomer to form an uncured layer, polymerizing the addition monomer forming a layer of a thermoset polymer adhered to the metal foil to form a lithium free metal anode and electrochemically introducing lithium ions to the lithium free metal anode to form the lithium metal laminate anode.

The present disclosure relates to a negative electrode for lithium-free secondary battery and a lithium-free secondary battery comprising the same, which suppress side reactions between the electrolyte and the lithium metal layer electrodeposited on the negative electrode during charging and discharging and thus can improve the efficiency and life characteristics of a lithium-free secondary battery.

The present invention relates to a negative electrode for a lithium-free secondary battery, which can reduce galvanic corrosion and side reactions on the negative electrode and achieve uniform electrodeposition of lithium metal while being made lightweight and thin, and a method for manufacturing the same, in which the negative electrode for a lithium-free secondary battery is characterized by comprising: a porous metal layer having a three-dimensional microstructure, and a conductive carbon nanostructure formed on the porous metal layer, in which the porous metal layer includes a metal mesh layer in which a fibrous metal having a micron-sized diameter forms a mesh structure, and a metal nanostructure formed on the fibrous metal, and at least a portion of the metal nanostructures are connected to each other to define a plurality of pores on the porous metal layer.

A method of forming a lithium-free glass article includes thermally treating the glass article to impart a fictive temperature and ion exchanging the thermally treated glass article. The thermal treatment includes heating the glass article to a hold temperature from 130° C. below to 20° C. above an annealing point of the glass article; holding the glass article at the hold temperature for a hold period; cooling the glass article at a first cooling rate from the hold temperature to an intermediate temperature; and cooling the glass article at a second cooling rate from the intermediate temperature to room temperature. The ion exchanged glass article includes a compressive stress greater than or equal to 900 MPa, as measured for an article having a thickness of 1.1 mm; and a warp less than or equal to 0.3 mm, as measured for an article having a length less than 200 mm.

This invention discloses a method for preparing high-grade lithium phosphate from lithium precipitation mother liquor. Using lithium precipitation mother liquor as raw material, it is mixed and reacted with sodium dihydrogen phosphate dihydrate solution to obtain a lithium phosphate slurry. After pressure filtration, heating, slurry washing, washing, flash drying, and packaging, the high-grade lithium phosphate product is finally produced. This method is not only effective and practical, but also improves the quality of lithium phosphate products, meeting the needs of downstream customers. It also increases the recycling rate of lithium precipitation mother liquor, reduces external discharge, and achieves a lithium-free, green, closed-loop production process from salt fields to lithium phosphate products.

The present invention relates to a negative electrode for a lithium-free secondary battery, a method for manufacturing the same, and a lithium-free secondary battery, which can improve the electrochemical properties and life characteristics of the lithium-free secondary battery. The negative electrode may include a conductive metal layer and a lithium electrodeposition induction layer formed on the conductive metal layer and containing an intermetallic compound to which copper and zinc are bonded.

The present disclosure relates to a negative electrode for lithium-free secondary battery which can improve the electrochemical and life time characteristics of a lithium-free secondary battery, a manufacturing method thereof and a lithium-free secondary battery. The negative electrode may include a conductive metal layer; and a lithium electrodeposition induction layer formed on the conductive metal layer and containing an intermetallic compound in which copper and zinc are bonded.

A lithium-ion battery may include a lithium-free cathode, a lithiated anode, and a separator / electrolyte between the lithium-free cathode and the lithiated anode. The lithium-free cathode may include FeOF and MnO2. The FeOF may be in the form of nanorods, and the MnO2 may be in the form of monolayer nanosheets. The FeOF nanorods may be sandwiched or wrapped by the monolayer MnO2 nanosheets.

A lithium-free glass composition is disclosed that includes SiO2 in an amount from 50 to 58% by weight; Al2O3 in an amount from 18 to 22% by weight; CaO in an amount from 7 to 12% by weight; MgO in an amount from 11.5 to 15% by weight; Na2O in an amount from 0.05 to 0.5% by weight; ZrO2 in an amount from 0 to 5 wt. %; and Li2O in an amount less than 0.5% by weight, and the combined amount of SiO2+Al2O3+MgO+CaO is less than or equal to 99.5% by weight; expressed as percentages by weight based on the weight of the entire composition. The composition satisfies at least one of the following: a ratio C1 (C1=SiO2 / (MgO+CaO)) of 2.3-2.7; a ratio C2 (C2=MgO / CaO) of at least 1.3, and a ratio C4 (C4=Al3+ / Mg2+) of at least 1.3. The lithium-free glass composition has a fiberizing temperature no greater than 1,300° C.