379 results about "Fast ion conductor" patented technology

A programmable metallization cell ("PMC") comprises a fast ion conductor such as a chalcogenide-metal ion and a plurality of electrodes (e.g., an anode and a cathode) disposed at the surface of the fast ion conductor and spaced a set distance apart from each other. Preferably, the fast ion conductor comprises a chalcogenide with Group IB or Group IIB metals, the anode comprises silver, and the cathode comprises aluminum or other conductor. When a voltage is applied to the anode and the cathode, a non-volatile metal dendrite grows from the cathode along the surface of the fast ion conductor towards the anode. The growth rate of the dendrite is a function of the applied voltage and time. The growth of the dendrite may be stopped by removing the voltage and the dendrite may be retracted by reversing the voltage polarity at the anode and cathode. Changes in the length of the dendrite affect the resistance and capacitance of the PMC. The PMC may be incorporated into a variety of technologies such as memory devices, programmable resistor/capacitor devices, optical devices, sensors, and the like. Electrodes additional to the cathode and anode can be provided to serve as outputs or additional outputs of the devices in sensing electrical characteristics which are dependent upon the extent of the dendrite.

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 invention discloses a preparation method of an improved room temperature electron ion fast transfer electrode slicefor a solid-state secondary lithium battery. The method comprises the following steps: (1) evenly mixing an active material, a conductive agent and a fast ion conductor according to a certain proportion; (2) adding a certain amount of a binder into the mixture, and mixing uniformly to obtain a uniform slurry; and (3) preparing the slurry into slices, and drying to obtain the required electrode slice. The preparation method of the electrode slice preparation uses the fast ion conductor material with high temperature high lithium ion conductivity; the material can play the role of increasing the contact area between the active particles and solid electrolyte, and he form a three-dimensional electron and lithium ion transport network, so as to ensure the rapid conduction of the electrons in the electrode also improve the transmission rate of lithium ions between the active particles and electrolyte. Therefore, the preparation method is beneficial to reducing the interface impedance among the active particles in the electrode slice and between the active particles and the solid electrolyte, thereby increasing the power rate performance of the solid-state secondary lithium battery.

The invention discloses a modified positive electrode material of a lithium ion battery and a preparation method of the modified positive electrode material. The modified positive electrode material is characterized in that the modified positive electrode material is made of a lithium fast ion conductor and a positive electrode material of lithium ion battery at a molar ratio of n:1, wherein n is larger than 0 and not larger than 0.15. The invention also discloses the preparation method of the modified positive electrode material of the lithium ion battery. The modified positive electrode material provided by the invention is improved in conductivity property performance and surface properties, thereby enhancing the specific volume of the lithium ion battery, and improving the charging-discharging efficiency, rate capacity, cycling performance and temperature adaptability of the lithium ion battery.

The invention provides a single-crystal lithium nickel manganese cobalt positive electrode material. The single-crystal lithium nickel manganese cobalt positive electrode material comprises a substrate, wherein the substrate is a compound shown as a formula I of LiNi<x>Co<y>Mn<1-x-y>M<z>O<2>, x is more than or equal to 0.3 but less than or equal to 0.75, y is more than or equal to 0.2 but less than or equal to 0.3, z is more than or equal to 0 but less than or equal to 0.1, and a coating layer is coated on a surface of the substrate and is one or more of Li2ZrO3, Li2SnO3, LiNbO3, Li4Ti5O12 and LiAlO2. Compared with the prior art, a fast ion conductor is coated on the surface, thus, the rate performance of a single-crystal material is improved, the gram capacity of the single-crystal material is improved, the cycle performance of the material is further improved, the internal resistance can also be reduced, the polarization loss is reduced, and the cycle lifetime of a battery is prolonged; and meanwhile, the advantage of large compaction of a single-crystal ternary material is maintained, a particle broken phenomenon caused by rolling particles similar to secondary particles during battery fabrication can be prevented due to relatively high compaction, and the cycle performance is improved.

The invention discloses a modified high-nickel positive electrode material coated with a fast ion conductor and a preparation method of the modified high-nickel positive electrode material. The high-nickel positive electrode material comprises a substrate, wherein the substrate is a compound LiNi<1-x-y>Co<x>Mn<y>M<z>O<2> shown in a formula I, in the formula I, x is more than 0 but less than or equal to 0.20, y is more than 0 but less than or equal to 0.20, z is more than 0 but less than or equal to 0.1, and M is arbitrary one or more of elements of Al, Mg, Ti, Zr, Mn, Ni, Sn, Co, Zn, W, Mo, Ru, Ca, Sr, Ba, B, Y, V and Nb. The preparation method comprises the following steps of washing and drying the high-nickel positive electrode material, uniformly mixing the high-nickel positive electrode material and an appropriate amount of coating agent, and performing sintering and sieving to obtain the modified high-nickel positive electrode material coated with the fast ion conductor. The fastion conductor is coated by washing and surface drying methods, the alkali amount of a surface of the positive electrode material is reduced, side reaction of the material and an electrolyte is reduced, and the high-temperature stability and the safety of the material are improved; and by doping and coating the surface with the fast ion conductor, the energy density, the rate performance and the cycle property of the material are improved, and the long cycle lifetime of a battery is finally prolonged.

The embodiment of the invention relates to a lithium ion battery anode material. The lithium ion battery anode material comprises an anode active material and a fast ionic conductor layer and a conductive polymer layer which are coated on the surface of the anode active material, wherein the fast ion conductor layer comprises a fast ion conductor Li<5+x+y>N<3-x>M<2-y>O12 having a garnet structure, wherein N is one or more of La, Al, Sr, Sc, Cr, Ba, Fe and Mo; M is one or more of Ta, Nb And V, x is more than or equal to 0 and less than or equal to 2, and y is more than or equal to 0 and less than or equal to 1. The lithium ion battery anode material not only has relatively high charging potential so as to greatly promote the capacity of a lithium ion battery, but also is capable of effectively improving the cycle stability and prolonging the service life of the lithium ion battery, and realizing the rapid charging and discharging. The embodiment of the invention also provides a preparation method of the lithium ion battery anode material.

The invention discloses a modified high nickel ternary positive electrode material. The surface of a high nickel ternary positive electrode material is coated with a coating layer containing a fast ion conductor. The fast ion conductor has the chemical general formula of Li3x1La2/3-x1Ma1TiNz1O3, Li2+2x2Zn1-x2GeO4 or LiM'2(PO4)3, wherein M represents Ba<2+> and/or Sr<2+>, N represents Al<3+> and/orZr<4+>, x1 is greater than or equal to 0.04 and less than or equal to 0.167, a1 is greater than or equal to 0 and less than or equal to 1, z1 is greater than or equal to 0 and less than or equal to 1, x2 is greater than -0.3 and less than 0.8, and M' represents one or more of Zr, Ti, Ge and Hf. Compared with the existing positive electrode material, the modified high nickel ternary positive electrode material is provided with the coating layer containing the fast ion conductor and the coating layer can react with residual lithium on the surface of the material to reduce residual lithium on the surface of the material and inhibit side reactions of the residual lithium and the electrolyte so that material surface stability and cycle performances are improved. The modified high nickel ternary positive electrode material has good lithium ion deintercalation ability, improves the first discharge capacity of the material and first coulombic efficiency and has a good application prospect. The invention also discloses a preparation method of the modified high nickel ternary positive electrode material and a lithium ion battery.

The invention discloses a high-nickel ternary positive electrode material coated with a fast ion conductor, a preparation method thereof, and a lithium ion battery prepared from the material. The basematerial of the high-nickel ternary positive electrode material coated with the fast ion conductor is LiNi1-x-yCoxMnyMzO2, wherein x is more than 0 and not more than 0.15, y is more than 0 and not more than 0.15, z is not less than 0 and not more than 0.1, and M is any one or more of Al, Mg, Co, Ni, Ti, Fe, Zr, and Sn; and the chemical general formula of the fast ion conductor is Li1+aAaD2-a(PO4)3, wherein A is any one or more of Al, Cr, Ga, Fe, Sc, In, Lu, Y, and La, D is any one or more of Ti, Ge, Zr, Sn and Hf, and a is more than 0 and not more than 1. The coating of the surface with the fast ion conductor can effectively reduce the residual lithium on the surface of the ternary positive electrode material, and reduces side reactions of the ternary positive electrode material and an electrolyte; and the lithium ion battery assembled by using the positive electrode material has a high first charge-discharge specific capacity and a high capacity retention.

The invention discloses a diaphragm for a lithium-air battery, which has a three-layer sandwich structure, wherein an intermediate layer is a solid lithium fast ion conductor which takes LiM2-xNx(PO4)3 or NaM2-xNx(PO4)3 (x is more than or equal to 0 and is less than or equal to 0.8, M is Ti, and N is one of elements such as Ge, Al, Si, Ga and the like) as a matrix; and both sides of the diaphragm are provided with a layer of organic polymer porous film or inorganic-organic composite diaphragm of the LiM2-xNx(PO4)3 or NaM2-xNx(PO4)3 (the x is more than or equal to 0 and is less than or equal to 0.8) lithium fast ion conductor with nanometer particles and an organic polymer respectively. The invention also provides a method for preparing the diaphragm for the lithium-air battery. The diaphragm has quick lithium ion passing performance, isolates an organic electrolyte and an aqueous electrolyte at the same time, prevents the moisture from contacting metal lithium to produce the hazard or generate inert substances to stop the reaction, and has good mechanical property at the same time.

The invention relates to a composite solid electrolyte material without adding lithium salt as well as an electrolyte membrane and a preparation method thereof. The composite solid electrolyte material comprises a polymer matrix material and a fast ion conductor powder material; the chemical formula of the fast ion conductor powder material is Li7-xLa3Zr2-xMxO12, wherein M is at least one of Al, Ta, Nb, W, Ga, Y and Te, and x is greater than or equal to 0 and less than or equal to 1; the composite solid electrolyte material contains no lithium salt. Compared with other composite solid electrolyte, the composite solid electrolyte material disclosed by the invention has the greatest difference that no lithium salt in any form is added in the polymer, and ionic conductivity at room temperature under the condition can reach 10<-4>S cm<-1>. The composite solid electrolyte membrane disclosed by the invention has good cycle performance and rate capability at room temperature of 25 DEG C and 60 DEG C when being applied to a lithium secondary battery.

The invention provides an LiBH4-silver/silver halide compound fast-ion conductor and a preparation method thereof. The LiBH4-silver/silver halide compound fast-ion conductor is prepared from LiBH4 and silver or silver halide which are at the mole ratio of 20:1 to 4:1. The preparation method of the LiBH4-silver/silver halide compound fast-ion conductor, which is provided by the invention, is simple and low in cost, and can be used for stabilizing the high-temperature phase of LiBH4 and increasing the diffusion channel of an Li element by forming an LiBH4-Ag/AgX (X is a halogen element) compound by adding Ag and the halide of Ag to LiBH4, thus greatly enhancing the ionic conductivity compared with the ionic conductivity of LiBH4, achieving the cm-1 order of magnitude at 100 DEG C for 10-3 seconds and providing wider application prospect for solid electrolyte.

The invention provides a high-nickel ternary cathode material coated with a fast ion conductor and a preparation method thereof. The high-nickel ternary cathode material is spherical or spheroidic secondary particles composed of primary particles, the diameter of the high-nickel ternary cathode material is 1-30 [mu]m, and the chemical formula of the high-nickel ternary cathode material is LiNi0.8Co0.1Mn0.1O2. The preparation method comprises the following steps of: weighing raw materials for synthesizing the fast ion conductor in proportion, and uniformly dispersing the raw materials in a solvent to obtain a mixed solution; adding the high-nickel ternary precursor into the mixed solution, and then performing stirring, drying and grinding to obtain high-nickel ternary precursor powder coated with the fast ion conductor; and uniformly mixing the obtained precursor powder with a lithium salt, and performing sintering to obtain the high-nickel ternary cathode material coated with the fastion conductor. The fast ion conductor material is used as a coating substance of the ternary cathode material and can provide a fast transmission channel for lithium ion transmission, so that the purpose of reducing the internal resistance of the battery is achieved; and after coating, the cycling stability of the battery is improved under the condition that the specific discharge capacity of thebattery is not reduced.

The invention discloses a preparation method of a fast ion conductor and conducting polymer dual-modified ternary cathode material for a lithium-ion battery. According to the material, a ternary cathode material for a lithium-ion battery is taken as a core, a fast ion conductor is taken as a first coating layer, a conducting polymer is taken as a second coating layer and the fast ion conductor isany one of lithium vanadate, lithium metaaluminate and lithium zirconate. The fast ion conductor and the ternary cathode material are firstly mixed evenly and ground; the ternary cathode material is coated with the fast ion conductor by using a high-temperature solid state method; the conducting polymer and the ternary cathode material coated with the fast ion conductor are mixed evenly and milled; and the ternary cathode material coated with the fast ion conductor is coated with the conducting polymer to finally obtain the fast ion conductor and conducting polymer dual-modified ternary cathode material for the lithium-ion battery. The fast ion conductor is combined with the conducting polymer to modify the ternary cathode material, so that the ternary cathode material has excellent cycleperformance and good rate capability.

The invention provides a ceramic composite separator which comprises a polymer layer and a ceramic layer compounded on the polymer layer, wherein the joint surface of the ceramic layer and the polymer layer is a rough surface with a concave-convex structure; and the ceramic layer comprises a fast ion conductor. The separator comprises the ceramic layer and the polymer layer, and the rough surface with the concave-convex structure is formed between the ceramic layer and the polymer layer, so that the binding force between the ceramic layer and a polyolefin membrane layer can be improved, the stability of the separator can be further improved, and service life of the separator can be further prolonged. The ceramic layer of the separator comprises a fast ion conductor material, so that the ionic conduction capacity of the separator can be effectively improved, and the capacity of a battery under the high-rate condition is further improved. In addition, the separator has high heat resistance, the electrochemical performance and safety of the battery are improved, and the separator has high application value.

The invention discloses a preparation method of an NASICON type lithium fast ion conductor. The preparation method comprises the following steps: adding butyl titanate into a citric acid solution, uniformly stirring the solution, adding a citric acid solution of lithium nitrate, aluminum nitrate and diammonium phosphate, uniformly stirring the solution and adding ethylene glycol, heating the solution to a certain temperature, and stirring the solution to completely gelatinize the same; drying the gel to obtain dry gel, and grinding and calcining the dry gel to obtain precursor powder; and grinding the precursor powder fine powder, carrying out isostatic press molding on the fine powder on a tablet press to obtain an electrolyte sheet of the NASICON type lithium fast ion conductor. The preparation method is used for reducing the sintering temperature of the material, perfecting the sintering performance of the material and improving the density of the material to improve the ionic conductivity of the material. The ionic conductivity of the NASICON type lithium fast ion conductor prepared by the preparation method reaches 6.34*10<-4> S/cm (25 DEG C), so that compared with a traditional preparation method, the ionic conductivity is significantly improved.

The invention discloses a lithium-enriched manganese-based anode material with a fast ion conductor coating layer and a surface heterostructure and a preparation method of the lithium-enriched manganese-based anode material. The surface of the lithium-enriched manganese-based anode material is coated with a coating layer consisting of Li3PO4 and Li4P2O7; a spinel phase nano-crystal is inlaid in the surface of the lithium-enriched manganese-based anode material; the spinel phase nano-crystal and a lithium-enriched layered material form a heterostructure; the lithium-enriched manganese-based anode material has a structural formula of Li1+aMnbMcO2, wherein M is one or more of Ni, Co, Al, Cr, Fe and Mg, 0<=a<=1, 0<=b<=1, and 0<=c<=1. The method comprises the following steps: (1) fully mixing the lithium-enriched manganese-based anode material with a proper amount of phosphate; and (2) sintering the sample which is uniformly mixed in a certain atmosphere, thus obtaining the lithium-enriched manganese-based anode material with the fast ion conductor coating layer and the surface heterostructure. The first coulombic efficiency of the lithium-enriched anode material is improved, the cycling stability and rate performance of the lithium-enriched anode material are improved, and the requirements of a power battery can be met.

The invention relates to a positive electrode material of a lithium ion battery. The positive electrode material comprises a basic material and a fast ion conductor coating layer, wherein the coatinglayer is selected from a lithium-titanium composite oxide, a lithium-zirconium composite oxide or a lithium-phosphorus composite compound, wherein the basic material is selected from one or more thantwo of lithium cobalt oxide, lithium nickel cobalt aluminate, lithium nickel cobalt manganate, lithium manganate, lithium iron phosphate, lithium nickel manganate or lithium nickel cobalt oxide; the preparation method comprises the following stepsof preparing the raw materials containing elements in the fast-ion conductor into a precursor, and then carrying out surface fusion with the basic material, and the solid coating film is formed by sintering, so that the ion migration capacity is improved, and the decomposition reaction of the transition element to the electrolyte is reduced, the cyclelife of the prepared lithium ion battery is prolonged, the safety is improved, and the positive electrode material has a wide application prospect.

The invention discloses a preparation method and application of a cathode material of a fast ion conductor coated modified lithium ion battery. The method comprises the following steps: after ball-milling and mixing nanoscale aluminum powder and a cathode material, stirring and reacting with a lithium-containing solution to obtain an aluminum hydroxide colloid coated cathode material precursor; calcining the aluminum hydroxide colloid coated cathode material precursor under a high temperature to obtain the cathode material of the fast ion conductor coated modified lithium ion battery with compact uniformity and good stability. The method can be used for preparing the cathode of the lithium ion battery with high rate capacity and high cycle performance; and the preparation method has the characteristics of low cost, simple operation, environmental friendliness and the like, and can be applied to large-scale industrial production.

The invention belongs to the field of new energy materials and electrochemistry, and particularly relates to a preparation method of a high-rate monox-based lithium electric anode material. Accordingto the method, a sol-gel method and a carbon thermal reduction method are adopted to prepare a monox-carbon/ graphene material with electrochemical activity, then dispersed fast ion conductor lithiumsilicate is prepared on the surface of the monox-carbon material through spin wrapping and thermal treatment, and finally the monox-carbon@lithium silicate/ graphene material is obtained. The fast ionconductor lithium silicate can effectively accelerate the ion transport during charging and discharging of a composite material and accelerate the reaction kinetics of an electrode. The in-situ introduction of the flexible graphene during preparation can effectively buffer the volume change caused by the lithium deintercalation of monox in a cyclic process and improve the structural stability ofthe electrode. The preparation method of the high-rate monox-based lithium electric anode material has the advantages that the designed material has higher rate characteristics and good cycle stability; the preparation process has higher controllability and can be applied to the preparation of other high-performance electrode materials.