283 results about "Lithium ion conductors" patented technology

A powder material which can electrochemically store and release lithium ions rapidly in a large amount is provided. In addition, an electrode structure for an energy storage device which can provide a high energy density and a high power density and has a long life, and an energy storage device using the electrode structure are provided. In a powder material which can electrochemically store and release lithium ions, the surface of particles of one of silicon metal and tin metal and an alloy of any thereof is coated by an oxide including a transition metal element selected from the group consisting of W, Ti, Mo, Nb, and V as a main component. The electrode structure includes the powder material. The battery device includes a negative electrode having the electrode structure, a lithium ion conductor, and a positive electrode, and utilizes an oxidation reaction of lithium and a reduction reaction of lithium ion.

The invention discloses a high-nickel positive active material of a surface-modified lithium ion battery. A matrix substance is the high-nickel positive active material LiNixCoyMzO2, the surface of the matrix substance is uniformly coated by a lithium-ion conductor compound which comprises at least one of LiAlO2, Li4Ti5O2 and Li2ZrO3; the content of the total impurity lithium in the positive active material is below 0.085%. The invention also discloses a preparation method of the positive active material. The preparation method comprises the following steps of: firstly mixing the matrix substance with an organic solution containing aluminum, an organic solution containing titanium or an organic suspension liquid containing aluminum/titanium/zirconium, drying, calcining the dried mixture, finally generating the lithium-ion conductor compound on the surface of the matrix substance, namely the high-nickel positive active material of the surface-modified lithium ion battery. The high-nickel positive active material disclosed by the invention has the advantages that the content of alkali substances is obviously reduced, the processing performance of the material is improved, and the electrochemical stability is improved.

The invention relates to organic-inorganic all-solid-state composite electrolyte as well as preparation and application methods thereof, belonging to the field of lithium ion batteries. According to the organic-inorganic all-solid-state composite electrolyte, a highly-ordered three-dimensional connection network skeleton is formed by an inorganic fast lithium ion conductor, and a three-dimensional connection network is filled with a polymer and lithium salt. The organic-inorganic all-solid-state composite electrolyte which is flexible and has a controllable three-dimensional connection network structure is prepared. The electrolyte is high in lithium ion conductivity, wide in electrochemical window, good in mechanical property and stable to lithium metal. A lithium ion secondary battery assembled by a composite electrolyte membrane prepared by the method is high in capacity, stable in cycle performance, low in interface impedance and good in interface stability.

The present disclosure sets forth battery components for secondary and/or traction batteries. Described herein are new solid-state lithium (Li) conducting electrolytes including monolithic, single layer, and bi-layer solid-state sulfide-based lithium ion (Li⁺) conducting catholytes or electrolytes. These solid-state ion conductors have particular chemical compositions which are arranged and/or bonded through both crystalline and amorphous bonds. Also provided herein are methods of making these solid-state sulfide-based lithium ion conductors including new annealing methods. These ion conductors are useful, for example, as membrane separators in rechargeable batteries.

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.

The invention discloses a preparation method of lithium metal through electrolysis, which comprises the following steps: at normal temperature and normal pressure, applying direct current voltage on an anode current collector and a cathode current collector so that potassium ions in a water phase in an anode chamber penetrate through a diaphragm having lithium ion conductor characteristics under the driving of the voltage, an organic solvent in a cathode chamber is reduced to a metal lithium single substance which is deposited and enriched on the surface of the cathode current collector to obtain the product, wherein the anode chamber of an electrolysis cell is filled with an aqueous solution at least containing the lithium ions, the cathode chamber od the electrolysis cell is filled with the organic solvent having the lithium ion conductor characteristics, the diaphragm for separating the anode chamber from the cathode chamber is a lithium ion conductor ceramic membrane having the lithium ion conductor characteristics or a composite membrane of a lithium ion conductor and a polymer, and the cathode chamber is in inert gas atmosphere. The electrolysis preparation method for lithium metal avoids severe conditions which are required to prepare lithium metal by a traditional high temperature molten electrolysis process, and has the characteristics of low energy consumption, high lithium extraction efficiency and high product purity and is environment-friendly and wide in raw material sources.

The invention relates to an electrode material of a lithium ion battery, in particular to a method for pre-lithiating a cathode material. The method comprises the steps that an electrolytic cell cathode cavity is made of the electrode material such as a lithium ion cathode material and arranged in a lithium ion conductive organic electrolyte; an anode cavity is an aqueous solution containing lithium salt or an organic solution; the anode cavity is separated from the cathode cavity by a lithium ion conductor ceramic membrane or a composite membrane of lithium ion conductor ceramic and a high molecular material; an electric potential and current density are controlled by external circuit charge and discharge equipment to allow lithium ions to migrate to a cathode from an anode through the membrane; and an SEI (Solid Electrolyte Interphase) membrane is formed on the surface of the material; or the electrode material is pre-lithiated. According to the method, a cheap and safe lithium ion saline solution serves as a source of the lithium ion; the SEI membrane is generated for the cathode of the lithium ion battery in advance; or lithium is supplemented to the electrode material; the coulombic efficiency and cycling stability of the cathode material can be improved; a formation process in production of the lithium ion battery in the prior art is simplified; the electrode material and cost are saved; and the method is safe and efficient and has a large-scale application prospect.

A battery with a sulfur-containing cathode, an anode, and a separator between the cathode and the anode has a coating comprising a single-lithium ion conductor on at least one of the cathode or the separator.

A solid electrolyte for a lithium-sulfur battery includes particles of a lithium ion conducting oxide composition embedded within a lithium ion conducting sulfide composition. The lithium ion conducting oxide composition can be Li₇La₃Zr₂O₁₂ (LLZO). The lithium ion conducting sulfide composition can be β-Li₃PS₄ (LPS). A lithium ion battery and a method of making a solid electrolyte for a lithium ion battery are also disclosed.

The present invention discloses a all-solid lithium secondary battery that has large chare and discharge output current denseness and excellent charge and discharge cycle life which can be easily manufactured at low cost. In the manufacturing process of the all-solid lithium secondary battery, a new lithium ion conductor with ionic conduction improved can be obtained through vitrification to mixed electrolytes by mixing Alpha-oxide of alumina in various sulfide system lithium ion conductivity solid electrolyte. The electrolytes layer 8 used the lithium ion conductor, and positive and negative electrode (I), (II) are formed by positive and negative electrode material 3, 7 are constituted. Subsequently, cascading at least 1 layer in positive and negative electrode (I), (II) with electrolytes layer, and producing battery while electrolytes not crystallizes by heating and compressing as a whole.

The invention relates to preparation methods of a lithium ion battery composite positive electrode, a flexible lithium battery and a solid-state lithium battery. A composite positive electrode material of which a surface is coated with an inorganic rapid lithium ion conductor is obtained by uniformly mixing a precursor liquid of the rapid lithium ion conductor and a lithium ion battery positive electrode material under a certain temperature, and an inorganic rapid lithium ion conductor coated composite positive electrode material is obtained after thermal processing is performed on the composite positive electrode, wherein the inorganic rapid lithium ion conductor is a high-electrical conductivity garnet-shaped solid-state electrolyte Li<5+x>N<x>La<3-x>M<2>O<12> (X is more than or equal to 0 but less than or equal to 2, M is Nb, Ta, Sb or Bi, and N is Ca, Ba, Sr or Ge) and a modified compound thereof Li<7+x>(La<2-x>M<x>)B<2>O<12> (X is more than or equal to 0 but less than or equal to 2, M is Ca, Ba, Sr or Ge, and B is Zr, Hf or Sn), or Li<7-x>La<3>Zr<2-x>Ta<x>O<12> (X is more than or equal to 0 but less than or equal to 2); and/or the inorganic rapid lithium ion conductor is LiM<2>O<4> with a spinel structure, and M is Ni and/or Mn; and/or the inorganic rapid lithium ion conductor is LiMO<2> with a layered structure, and M is at least one of Ni, Co, Mn and Al; and/or the inorganic rapid lithium ion conductor is a lithium-rich manganese-based positive electrode material (x)Li<2>MnO<3>.(1-x)LiMO<2>, x is more than 0.1 but less than 0.9, and M is one of Ni, Co and Mn. By the composite positive electrode material, the cycle performance, the high-temperature performance and the rate performance of the lithium ion battery positive electrode material can be improved.

There is provided a series of novel particulate stabilized lithiated compounds which can be utilized as cathodic materials in lithium ion battery cells. Each particle of the material defines an inner lithiated metal oxide core which acts as an intercalation cathode. A lithium ion conductor coating surrounds the core to stabilize the latter and to improve the electrochemical properties of the material.

The invention discloses a cathode material for a fast lithium ion conductor phase-modified lithium ion battery and a preparation method thereof. The key points of the technical scheme are as follows: the cathode material for the fast lithium ion conductor phase-modified lithium ion battery is a composite material consisting of a rare-earth element doped composite layered lithium ion battery cathode material xLi2MO3 (1-x) LiN(1-y)RyO2 (M is Mn, Ti or Sn, N is Mn, Ni, Co, Fe, Cr, V or Mo, R is one or more than one of Sc, Y, Pr, Nd, La, Ce, Sm, Yb, Eu and Gd, x is larger than 0 and smaller than 1, and y is larger than 0 and smaller than 0.2) and a fast lithium ion conductor, wherein the molar ratio of the fast lithium ion conductor to the rare-earth element doped composite layered lithium ion battery cathode material is n:1, and n is larger than 0 and smaller than or equal to 0.15. The invention also discloses a preparation method of the cathode material for the fast lithium ion conductor phase-modified lithium ion battery. The cathode material for a fast lithium ion conductor phase-modified lithium ion battery has the advantages of high specific capacity, good rate capacity, stability in recycling and strong temperature adaptation.

The invention relates to a novel chip type solid secondary lithium battery supported by a garnet type solid electrolyte and a preparation method thereof. In the solid secondary lithium battery, one side of the solid electrolyte is coated with a positive pole which is prepared from a positive pole active material, a polymer, a lithium ion conductor and conductive carbon, wherein the positive pole active material comprises LiFePO4, LiCoO2, LiMn2O4, LiNi0.5Mn1.5O4, LiNixCoyMn1-x-yO2 and/or Li[LixM1-x]O2, M is at least one of Ni, Co and Mn, the polymer comprises at least one of PEO, PVdF, PMMA and PAN, the lithium ion conductor comprises lithium salt, the mass ratio of the positive pole active material, to the conductive carbon to the polymer to the lithium ion conductor is 10:2:1:z, and z is smaller than or equal to 10.

The invention discloses a coated positive electrode material of a lithium-ion battery. A matrix substance of the positive electrode material is a high-nickel positive electrode active material Li<delta>Ni<x>Co<y>M<z>O<2>; a layer of uniform coating is arranged on the surface of the matrix substrate; and the coating is a metal oxide and/or a lithium-ion conductor compound and accounts for 0.01%-10% of the mass of the matrix substrate. The invention further discloses a preparation method of the coated positive electrode material of the lithium-ion battery. The method comprises the steps of firstly, fully dissolving a soluble metal salt into deionized water to obtain a water solution of the soluble metal salt; adding the matrix substrate to the water solution of the soluble metal salt, mixing to obtain a turbid liquid, carrying out full stirring, filtering and drying and then burning to obtain the coated positive electrode material of the lithium-ion battery. The preparation method of the coated positive electrode material of the lithium-ion battery is suitable for the high-nickel positive electrode material; and in-situ coating is carried out on the surface of the matrix substance to form a uniform coating layer, so that the effects of reducing the pH value and improving the cycle performance of the positive electrode material are achieved.

A solid electrolyte material of conducting a lithium ion comprises a sulfide-based lithium-ion conductor and α-alumina. Such a solid electrolyte material exhibits superior lithium-ion conductivity. Further, a battery device provided with such a solid electrolyte material is also provided. Furthermore, an all-solid lithium-ion secondary battery provided with such a battery device is also provided.

The invention provides a novel quasi garnet-structured lithium ion conductor (Li7-xLa3Zr2-xSbxO12, wherein x is more than 0 and less than or equal to 0.5) crystalline-state ceramic solid electrolyte material and a synthesis method thereof, and belongs to the field of lithium ion batteries. A novel quasi garnet-structured lithium ion conductor is synthesized by conventional solid-phase reaction. X-ray diffraction (XRD) diffraction peaks of Sb-doped samples show that the Sb-doped samples all have crystalline -state cubic phase quasi garnet-structures in the Sb doped range. The maximum lithium ion conductivity can reach 3.42*10<-4>S/cm at room temperature (30 DEG C). The sample is synthesized by the conventional solid phase method, a preparation process is simple, and sintering time is short. Zr is partially replaced by high-valence Sb, so the lithium ion vacancy is increased, the ionic conductivity is improved obviously, and antimonous oxide is low in price compared with zirconia, so manufacturing cost is reduced. Therefore, the synthesized compact ceramic solid electrolyte material can be probably applied to a lithium ion battery.

The invention discloses an electrochromic device and a preparation method and application thereof. The preparation method comprises the following steps: depositing a first conductive layer on the surface of a first substrate by adopting a coating process; depositing a first electrochromic layer on a mask on the surface of the first conductive layer; sequentially depositing an electrolyte layer and a second conductive layer on the surface of the first electrochromic layer by adopting a coating process; or preparing an electrolyte layer between the second conductive layer and the first electrochromic layer after the second conductive layer is deposited on the surface of a second substrate; obtaining a single-layer electrochromic device; or, sequentially depositing an electrolyte layer, a second electrochromic layer and a second conductive layer on the surface of the first electrochromic layer by adopting a coating process; or sequentially depositing the second conductive layer and the second electrochromic layer on the surface of the second substrate, and preparing the electrolyte layer between the second electrochromic layer and the first electrochromic layer; thereby obtaining a double-layer electrochromic device, wherein the electrolyte layer is a transparent solid-state organic lithium ion conductor film. According to the all-solid-state preparation process, the problem that large-area scale production is difficult to realize is effectively solved.

The invention discloses a sulfur/carbon composite material for a lithium-sulfur secondary battery and a preparation method thereof. The composite material is formed by compositing a micro-pore carbon substrate with a lithium ion conduction property and elemental sulfur filled in the micro-pore structure. The carbon substrate is used as an electronic conductor in the composite material, and is further used as a lithium ion conductor, so that sulfur electrode reaction is directly carried out on a sulfur/carbon solid-solid interface in a conversion reaction manner without directly contacting with electrolyte. Therefore, the problem of circulation caused by that a polysulfide intermediate product is dissolved in the electrolyte can be solved. Compared with the other sulfur/carbon composite electrode, the composite material has the advantages of high electrochemical capacity, good circulation stability, high charging and discharging efficiency and the like; and meanwhile, the preparation method is simple and low in cost, and has a good application prospect.

The invention provides a preparation method of a sulfide solid electrolyte material. The preparation method comprises the following steps: sulfide lithium ion conductor electrolyte powder, an adhesive and a solvent are mixed, and electrolyte slurry is obtained; the electrolyte slurry is uniformly stirred and dispersed, and uniform electrolyte slurry is obtained; the uniform electrolyte slurry is uniformly coated on a PET film, the electrolyte slurry which is coated on the PET film is dried at a set drying temperature, in order to evaporate the solvent part, and an electrolyte film is obtained; the electrolyte film is taken from the PET film, and the electrolyte film is cut according to a certain specification; the adhesive and the residual solvent in the cut electrolyte film are discharged, and a compact sulfide lithium ion conductor electrolyte sheet is obtained. The preparation method of the sulfide solid electrolyte material can effectively solve the problem that when an electrolyte sheet is prepared according to the prior preparation method of the all solid state electrolyte sheet, the electrolyte sheet which is thicker influences electrical performance of an all solid state battery.

Active materials for batteries are provided. According to an embodiment of the present invention, the active material includes a core material including a compound capable of electrochemical oxidation/reduction and a lithium ion conducting layer surrounding the core material. The lithium ion conducting layer includes a compound selected from the group consisting of lithium ion conductor, lithium ion conductive polymers, and mixtures thereof.

The invention relates to electrochromic glass, hollow glass and preparation methods thereof. The electrochromic glass comprises a substrate as well as an ion barrier layer, a bottom transparent conducting layer, an electrochromic layer, a first lithium ion conductor layer, an auxiliary electrode layer, a second lithium ion conductor layer, a top transparent conducting layer and a protective layer which are sequentially formed in the substrate. According to the electrochromic glass, the hollow glass and the preparation methods thereof, problems of low conformance rate and incapability of totally releasing productivity in a conventional process are solved.

The present invention provides a cathode active material for a nonaqueous electrolyte secondary battery with a high capacity, high stability and excellent output characteristics and a method for producing the same, and a nonaqueous electrolyte secondary battery using the cathode active material.

The cathode active material for a nonaqueous electrolyte secondary battery is represented by a general formula: Li_tNi_1.x.y.zCo_xAl_yTi_zO₂ wherein 0.98≦t≦1.10, 0<x≦0.30, 0.03≦y≦0.15, 0.001≦z≦0.03; and includes a hexagonal lithium-containing composite oxide with a layer structure of secondary particles having primary particles, in which a titanium-enriched layer is formed on a surface of the primary particles and/or a grain boundary between the primary particles. The titanium-enriched layer on the surface of the primary particles and/or a grain boundary between the primary particles serves as a lithium ion conductor, yielding smooth extraction and insertion of lithium ions. Accordingly, the secondary battery with a high capacity, high stability and excellent output characteristics can be produced when a positive electrode is formed with the lithium nickel composite oxide as a cathode active material.

The invention discloses a spherical LiFePO4/(C+La2/3-xLi3xTiO3) composite anode material. According to the composite material, carbon (C) serves as an electron conductor, and La2/3-xLi3xTiO3 serving as a fast lithium ion conductor is uniformly mixed and coated on the surface of spherical LiFePO4 so as to form a mixed conductor layer. The mixed conductor layer not only can conduct electrons and lithium ions, but also can prevent an electrolyte from corroding an active material and inhibit Fe from dissolving, so that the improvement on the electrochemical performance of the material is facilitated. The spherical LiFePO4/(C+La2/3-xLi3xTiO3) composite anode material disclosed by the invention has high conductivity and lithium ion diffusion rate, excellent high-magnification performance and high tap density, and is applicable to power type lithium-ion batteries; and the preparation method is simple, feasible, clean and pollution-free, is low in cost and is applicable to industrial scale production.