66 results about "Lithium.free" patented technology

The invention discloses an easily implemented lithium pre-insertion novel method for a cathode of a lithium ion super capacitor, wherein, a nonmetal lithium third electrode is led into a novel lithium ion super capacitor system which takes porous charcoal materials, conductive polymers or compounds of the conductive polymers as an anode, lithium insertable metal oxides or charcoal lithium insertion materials as the cathode and organic lithium salt solution as electrolyte, and lithium pre-insertion processing of the cathode with a depth of 5 to 60 percent is performed so as to prevent reduction of the ion concentration of the electrolyte during the charging and discharging process and non-reversible absorption of anions on the anode and improve the charging and discharging characteristics of the capacitor. The essential component of the nonmetal lithium third electrode is lithium-rich compounds with non-reversible lithium-free property; during the preparation process of the porous charcoal material anode or the conductive polymer anode, the lithium-rich compounds of the third electrode are mixed by mass percent of 3 to 50 and can form the lithium ion super capacitor together with the lithium insertable cathode after being prepared into the electrode; during the activation process of the capacitor, lithium pre-insertion of the cathode is realized.

The present invention is directed to a higher power, thin film lithium-ion electrolyte on a metallic substrate, enabling mass-produced solid-state lithium batteries. High-temperature thermodynamic equilibrium processing enables co-firing of oxides and base metals, providing a means to integrate the crystalline, lithium-stable, fast lithium-ion conductor lanthanum lithium tantalate (La_1/3-xLi_3xTaO₃) directly with a thin metal foil current collector appropriate for a lithium-free solid-state battery.

A thermal battery which comprises a number of stacked cells, each cell consisting essentially of an anode with a lithium compound, a lithium free pyrotechnic heat source pellet which includes a cathode precursor and an all lithium electrolyte layer separating between the anode and the pyrotechnic heat source pellet. Upon ignition of the heat source, an oxide of the cathode precursor is obtained which is lithiated by the lithium supplied by the all lithium electrolyte ion source.

Disclosed is a cathode active material comprising a lithium-free metal oxide and a material with high irreversible capacity. A novel lithium ion battery system using the cathode active material is also disclosed. The battery, comprising a cathode using a mixture of a Li-free metal oxide and a material with high irreversible capacity, and an anode comprising carbon instead of Li metal, shows excellent safety compared to a conventional battery using lithium metal as an anode. Additionally, the novel battery system has a higher charge/discharge capacity compared to a battery using a conventional cathode active material such as lithium cobalt oxide, lithium nickel oxide or lithium manganese oxide.

The invention discloses a solid-state battery and a preparation method thereof. The solid-state battery is composed of a positive electrode, an organic-inorganic composite solid electrolyte diaphragmand a negative electrode. The organic-inorganic composite solid electrolyte diaphragm and the positive electrode have good chemical and electrochemical stability; and the organic-inorganic composite solid electrolyte diaphragm and the negative material have relatively small interface impedance, and growth of lithium dendrites can be inhibited. The solid-state battery prepared by the method is small in interface impedance, controllable in interface side reaction, capable of being matched with various positive electrodes and negative electrodes, and free of lithium dendritic crystal growth phenomenon, so that the solid-state battery has high specific energy and long cycle life. And the preparation process of the solid-state battery designed by the invention is matched with the existing preparation process of the lithium ion battery, so that the requirement of large-scale production is met.

The invention discloses a metal lithium composite cathode as well as a preparation method and application thereof. The preparation method comprises the following steps: forming a metal lithium layer on the surface of a polymer film in a depositing manner at least by adopting a vacuum physical deposition method, and obtaining a composite band; respectively arranging one composite band at two sidesof a cathode piece, enabling the metal lithium layer in each composite band to contact the cathode piece, applying pressure to a composite structure consisting of the cathode piece and the composite band, obtaining the cathode piece with two side surfaces being respectively combined with the metal lithium layer, thus obtaining the metal lithium composite cathode. The lithium band is prepared through the vacuum physical deposition method, and a pressure-rolling process is combined, so that the metal lithium layer can be uniformly, continuously and thinly covered on the cathode, thereby obtaining a pre-lithiated cathode. The defect that the lithium band is easily broken is avoided, and at the same time the cathode is compacted, and the density of the cathode is increased. The metal lithium composite cathode is utilized to improve the first-time charge/discharge efficiency of a cathode material, can serve as a lithium-containing cathode and be matched with a lithium-free anode, and has abroad application prospect.

The invention discloses a modified lithium-free negative electrode, a preparation method thereof and a lithium ion battery with the modified lithium-free negative electrode. The modified lithium-freenegative electrode is prepared from a lithium-free negative electrode material and a metal lithium-framework carbon composite material, wherein the content of the metal lithium-framework carbon composite material is 2 to 20 percent by mass of the negative electrode active material. In the first charging-discharging process of the battery, metal lithium in the metal lithium-framework carbon material can supplement lithium consumed by forming an SEI layer on the surface of the lithium-free negative electrode, so that the first charging-discharging efficiency of the lithium-free negative electrode is improved.

The lead-free, preferably lithium-free, optical glass is useful in imaging, projection, telecommunications, optical communication and/or laser technology, particularly for making precise-pressed optical elements. It has a refractive index n_d of 1.50 to 1.57, an Abbé number νd of 61 to 70. It also has a low transformation temperature of about or below 400° C., good production and processing properties and crystallization resistance. It has a composition, in percent by weight, based on oxide content of P₂O₅, 40 to 60; Al₂O₃, 1 to 20; B₂O₃, 0 to <5; Na₂O, 0 to 30; K₂O, 0 to 30; Li₂O, 0 to <1; ΣM₂O, >15 to 40; BaO, 1 to 20; ZnO, 1 to 20; SrO, 0 to 5; CaO, 0 to 5; MgO, 0 to 5; and ΣMO, 5 to 25. In addition, it may contain standard refining agents, although it is preferably free of arsenic and fluorine.

The invention belongs to the technical field of new energy materials and energy storage and conversion materials, in particular to a lithium metal anode electrode material based on TiO2 nanotube array/titanium foam and a preparation method thereof. TiO2 nanotube arrays were prepared on the surface of porous titanium foam by anodic oxidation and annealed, A lithium metal anode material with high loading of lithium metal, which can greatly alleviate the volume expansion effect of lithium metal and restrain the lithium dendrite in the process of cycling charge and discharge, was prepared by melt-perfusion method by compositing lithium metal with TiO2 nanotube array/titanium foam. A surface of that porous titanium foam three-dimensional conductive skeleton in the negative electrode material isuniformly covered with a lay of ordered TiO2 nanotube array, and lithium metal is uniformly filled with the TiO2 nanotube array/titanium foam matrix. A symmetrical cell was fabricate by using that lithium metal anode material. The cell was fabricated at 0.5 mA- cm<2> Cycling 300 cycles (600 hours) at current density, exhibiting lithium-free dendrite and stable cycling.

The invention discloses a eutectic solvent electrolyte, a preparation method and a lithium metal battery. The eutectic solvent electrolyte comprises a lithium salt, an amide compound and an additive,wherein the molar ratio of the lithium salt to the amide compound is 1: 1-1: 10; and the additive comprises a cyclic carbonate compound. According to the invention, the lithium salt and the amide compound in a predetermined molar ratio are blended to form the eutectic solvent electrolyte. The eutectic solvent electrolyte has the advantages of incombustibility, high conductivity, large electrochemical window and the like; when the electrolyte is applied to the lithium metal battery, rapid migration and spherical deposition of lithium ions in the electrolyte can be realized, lithium dendrites donot grow, the cycle life is long, and meanwhile, the eutectic solvent electrolyte is relatively low in cost and high in safety, and has a good application prospect.

An additive for electrochemical energy storages is disclosed, wherein the additive contains at least one silicon- and alkaline earth metal-containing compound V1 which in contact with a fluorine-containing compound V2 in the energy storage forms at least one compound V3 selected from the group consisting of silicon- and fluorine-containing, lithium-free compounds V3a, alkaline earth metal- and fluorine-containing, lithium-free compounds V3b, silicon-, alkaline earth metal- and fluorine-containing, lithium-free compounds V3c and combinations thereof. Also disclosed is an electrochemical energy storage containing the additive.

A method for producing a solid lithium-based electrolyte for a solid microbattery implements the cathode sputtering of a lithium-based target material on an object supported by a substrate holder. A grid made of lithium-free electrically conductive material is interposed between the object and the lithium-based target material, the grid being electrically connected to the substrate holder.

The present invention firstly addresses the problem of providing a silicone adhesive which provides a highly antistatic adhesive layer, exhibits excellent adhesion to a substrate, and reduces the amount of adhesive residue left on an adherend after an adhesive tape or adhesive film having the adhesive layer is peeled off from the adherend. The present invention secondly addresses the problem of providing a silicone adhesive composition which is satisfactorily cured by being heated for a short period of time, particularly, for less than 5 minutes and provides a highly antistatic adhesive layer.The present invention firstly provides an addition reaction-curing silicone adhesive composition, which is characterized by containing (A) an addition reaction-curing silicone, (B) a compound having,in each molecule, at least two unsaturated hydrocarbon groups and two (poly)oxyalkylene residues, and (C) a lithium-free ionic liquid. The present invention secondly provides an addition reaction-curing silicone adhesive composition, which is characterized by containing (A) an addition reaction-curing silicone, (B) a compound having, in each molecule, at least one unsaturated hydrocarbon group and at least one (poly)oxyalkylene residue, (C) a lithium-free ionic liquid, and (e) a non-complex platinum-group metal catalyst of a compound having unsaturated hydrocarbon bonds.

A non-aqueous electrolyte secondary battery includes a positive electrode (11), a negative electrode (12), and a non-aqueous electrolyte (14). The positive electrode contains a lithium-free metal oxide and a positive electrode active material composed of an olivine-type lithium-containing phosphate represented by the general formula Li_xMPO₄, where M is at least one element selected from the group consisting of Co, Ni, Mn, and Fe, and 0<x<1.3.

The invention provides a preparation method for a battery based on metal lithium powder and a graphite negative electrode. The preparation method comprises the following steps: preparing a metal lithium powder/graphite negative electrode slice and a vanadium pentoxide positive electrode slice; welding the tabs of the positive and negative electrode slices; preparing an organic solvent with a lithium hexafluorophosphate concentration of 1 mol/L as an electrolyte of the battery; cutting a Celgard polymer film used as a battery diaphragm into a rectangular piece with a width of 60 mm and a lengthof 610 mm; winding the electrode slices with a coiler so as to form a lithium battery cell; filling a cylindrical steel shell, with a bottom diameter of 18 mm and a height of 65 mm, with the lithiumbattery cell so as to form a 18650 type lithium battery cell, and transferring the 18650 type lithium battery cell to an argon-protected glove box; injecting the electrolyte; and carrying out sealingso as to obtain the finished soft pack battery. According to the invention, the lithium-free positive electrode material vanadium pentoxide is adopted, and the metal lithium powder is introduced intothe graphite negative electrode slice, so the 18650 type lithium battery cell is formed; and the preparation method has the advantages of simple process, easy enlargement production and large-scale application potential.

The invention relates to a float glass sheet having a boron- and lithium-free glass composition comprising the following in weight percentage, expressed with respect to the total weight of glass: 65≤SiO₂≤78% 5≤Na₂O≤20% 0≤K₂O<5% 1≤Al₂O₃<6% 0≤CaO<4.5% 4≤MgO≤12% a (MgO/(MgO+CaO)) ratio≥0.5 characterized in that the glass sheet has: (I). The invention corresponds to an easy chemically-temperable soda-silica type glass composition, which is more suited for mass production than aluminosilicate glass, and therefore is available at low cost, and with a base glass/matrix composition that is close to or very similar to compositions already used in existing mass production, and finally which shows reduced or controlled increased warping effect.

The invention provides a method for preparing a metal lithium battery with ultra-high energy density. The preparation method comprises the following steps: preparing a metal lithium powder/graphite negative electrode slice surface-coated with a metal lithium powder layer and a vanadium pentoxide positive electrode slice; with a Celgard polymer film as a diaphragm material and an organic solvent containing lithium hexafluorophosphate as an electrolyte, assembling the metal lithium powder/graphite negative electrode slice and the vanadium pentoxide positive electrode slice in a glove box with argon protection so as to form a button type lithium battery, and carrying out standing and ageing; subjecting the aged lithium battery to initial discharging to a voltage of 1.5 V, wherein discharge current is 0.05 C; and charging the lithium battery having undergone initial discharging with a current of 0.1 C until the voltage is 4.0 V so as to obtain the metal lithium battery which can work normally. According to the invention, the lithium-free positive electrode material vanadium pentoxide is adopted, and the metal lithium powder is introduced into the graphite negative electrode slice, so the vanadium pentoxide-metal lithium/graphite battery with ultra-high energy density is formed; and the preparation method has the advantages of simple process, easy enlargement production and large-scale application potential.

The invention discloses a composite current collector for a lithium battery without a lithium negative electrode and a preparation method of the composite current collector, and belongs to the technical field of lithium ion battery material preparation. The problems that dead lithium is easily gathered on the surface of an existing current collector, so that active lithium in a negative-electrode-free lithium battery system is insufficient, battery operation cannot be supported, an SEI film formed on the surface is poor in mechanical performance, and continuous reaction between an electrolyte and a negative electrode cannot be effectively blocked are solved. According to the invention, the carbon paper is taken as the substrate and is soaked in the organic solvent containing the strong reducing compound to form the composite current collector, so that the dead lithium activation and inhibition capability of the current collector is effectively improved, the active lithium resource in a negative-electrode-free lithium battery system is protected, and the cycle performance of the battery is further remarkably improved.