164 results about "Lithium ion conductors" patented technology

The disclosed subject matter relates to lithium ion conductors and batteries (such as pseudo solid state and all solid state batteries), and methods of making and use thereof. Disclosed herein are lithium ion conductors comprising Li1+xNb1−xZrxOX4, wherein X is a halide; and 0≤x≤1. Also disclosed herein are methods of making and use of any of the lithium ion conductors (e.g., Formula I) disclosed herein. Also disclosed herein are devices comprising any of the lithium ion conductors disclosed herein (e.g., Formula I), such as a solid state battery.

The invention relates to a method for preparing a pyrochlore oxyfluoride solid electrolyte by a one-step solid phase method, which comprises the following steps: uniformly mixing lithium carbonate (Li2CO3), lanthanum oxide (La2O3), niobium pentoxide (Nb2O5) and lithium fluoride (LiF), and carrying out high-temperature one-time sintering under protective gas to synthesize a Li2-xLa (1 + x) / 3Nb2O6F (LLNOF solid electrolyte material. The synthesis route is optimized, a single fluorine source is used, and the types of raw materials are reduced; according to the method, secondary sintering is not needed, the pure-phase electrolyte powder can be obtained by adopting one-step sintering synthesis, the steps are simple, the efficiency is high, the cost is reduced, and the resource consumption is reduced. According to the obtained LLNOF electrolyte material powder, the synthesis temperature ranges from 900 DEG C to 1100 DEG C, heating to 1100 DEG C or above is not needed, the requirement for heating equipment is low, large-scale mass production can be conducted, the sample yield is large, and energy consumption is low. Required synthesis equipment is simple and easy to obtain, and the ionic conductivity is good. The lithium ion conductor with high conductivity and stability in air is synthesized through a one-step method.

The invention relates to the technical field of lithium ion batteries, and discloses lithium manganese iron phosphate and a preparation method thereof.The preparation method comprises the following steps that SP01, a lithium source, an iron source, a manganese source, a phosphorus source, a carbon source, a doping additive and water are mixed and ground into slurry; sP02, the slurry is subjected to screening and grading after being subjected to atomization drying; sP03, mixing the dried undersize material with a coating additive; sP04, putting the coated material into a kiln for sintering treatment; according to the method, fine powder does not exist in the obtained finished product lithium manganese iron phosphate, the graded material is coated and then sintered, and a double coating layer of a lithium ion conductor material and conductive carbon is formed on the surface of the lithium manganese iron phosphate material, so that the conductivity of the material can be improved; the direct contact between the material and electrolyte can be better protected, and the dissolution of manganese is avoided, so that the rate capability, the cycling stability and the safety of the material are improved.

The invention discloses a titanium lithium aluminum phosphate solid electrolyte polymer interface modification method and a preparation method thereof. The method comprises the following steps: firstly, selecting LITFSI (lithium ion conductor), PVDF-HFP (polyvinylidene fluoride-hexafluoropropylene) and DMSO (dimethyl sulfoxide) liquid, and mixing to form PVDF-HFP-based polymer mixed liquid; then, the PAN film doped with titanium lithium aluminum phosphate powder is uniformly coated with the mixed solution through a press coating method, and the PVDF-HFPPAN film is obtained through drying treatment. And cutting the membrane, placing the cut membrane on two sides of a ceramic chip solid electrolyte, assembling an all-solid-state battery, activating at 40-80 DEG C until the polymer is attached to a metal lithium negative electrode and the surface of the solid electrolyte in a gel state, and cooling to finally obtain the solid electrolyte with a PVDF-HFPPAN coated LATP coated PVDF-HFPPAN sandwich structure. The modified solid-state electrolyte membrane can effectively inhibit the interface reaction of LATP on the lithium negative electrode side and enhance the wettability of the positive and negative electrode interface, thereby meeting the cycle performance requirement of the solid-state battery under the normal temperature condition.

The invention relates to a composite negative electrode material and a preparation method and application thereof, the composite negative electrode material comprises a negative electrode material, and a lithium ion conductor layer and a metal oxide layer which sequentially coat the surface of the negative electrode material, the material of the lithium ion conductor layer is LizAxOy, xgt; 0, ygt; 0, zgt; 0, A is selected from at least one of Mg, Al, Ti, Mn, Zr, Nb, Mo, V or P, the material of the metal oxide layer is BmOn, and mgt; 0, ngt; b is selected from at least one of Al, Ti, Mg, Zn or Zr, and the thickness of the metal oxide layer is smaller than or equal to 3 nm. The composite negative electrode material has excellent cycle performance and storage performance, and the performance of the lithium ion battery can be effectively improved.

The present invention provides a ceramic material for a solid-state electrolyte, the ceramic material comprising: a first lithium ion conductor; and a second lithium ion conductor different from the first lithium ion conductor and which is a lithium metal halide.

The invention provides a sulfide composite electrolyte material and a preparation method and application thereof, the sulfide composite electrolyte material comprises an inner core and a coating layer, and the coating layer coats the inner core; the inner core is sulfide electrolyte particles, and the coating layer comprises a lithium ion conductor nano material, a polymer and a lithium salt. The sulfide composite electrolyte material is prepared by coating the surfaces of sulfide electrolyte particles with the coating layer with high lithium ion conductivity, so that the sulfide electrolyte membrane prepared from the sulfide composite electrolyte material has high lithium ion conductivity; and the coating layer on the surface effectively isolates the contact between electrolyte ions and air, so that the air stability of the sulfide electrolyte membrane is effectively improved.

The invention discloses a high-performance lithium-rich manganese oxide positive electrode material, a preparation method thereof and application of the high-performance lithium-rich manganese oxide positive electrode material to an all-solid-state battery. The lithium-rich manganese oxide positive electrode material coats / composites a lithium-rich manganese positive electrode base material and a lithium ion conductor or a conductive agent in situ through a freeze-drying method. In-situ coating / compounding of a lithium ion conductor or a conductive agent on the lithium-rich manganese oxide positive electrode material is realized through freeze drying, the interface impedance is effectively reduced, the interface stability is improved, and the lithium ion and electron transmission efficiency is improved. The lithium-rich manganese oxide positive electrode material prepared by the invention can inhibit the release and side reaction of lattice oxygen in the cycle process, and improve the structural stability and cycle life of the material; meanwhile, the freeze-drying method can maintain the nano dispersity and uniformity of the material, full solid-solid contact between the lithium-rich manganese material and a lithium ion conductor or a conductive agent is realized, and the high specific capacity of the lithium-rich manganese positive electrode material in all-solid-state battery application is ensured. The prepared lithium-rich manganese-based all-solid-state battery has the reversible specific capacity as high as 273 mAh / g, the bottleneck that the capacity release of the lithium-rich manganese oxide positive electrode material in an all-solid-state battery system is limited is broken through, the strategy provides a new design thought and technical path for the construction of the high-specific-energy all-solid-state battery positive electrode material, the adopted process is simple and controllable, and the method is suitable for industrial production. The method is suitable for large-scale preparation.

The present application relates to a kind of full solid-state lithium ion membrane reactor with symmetrical structure and its application, the reactor is in situ construction on the both sides of solid-state lithium ion conductor film with Pt and / or Ni as catalyst, with single-walled carbon nanotube etc. Conductive material is used as current collector gas diffusion electrode, the reactor can work in nitrogen hydrogen mixture atmosphere, integration is high, scale is flexible.The present application changes the working mode of traditional reactor using liquid electrolyte, replaces inefficient nitrogen and proton mass transfer with efficient lithium ion mass transfer, couples lithium-mediated nitrogen reduction and hydrogen oxidation reaction to synthesize ammonia, and the maximum working current density is increased to 1000mA / cm 2 , and can work at 40mA / cm 2 Current density for a long time, with innovation and broad industrial application prospect.

The invention belongs to the technical field of lithium ion battery positive electrode materials, and provides a plasma-assisted in-situ constructed lithium ion conductor coated high-nickel ternary positive electrode material as well as a preparation method and application thereof. Oxygen plasma active groups are formed through high-pressure ionization of oxygen, and the generated active groups interact with gas generated by thermal decomposition of an added solid source; the residual alkali on the surface of the high-nickel ternary positive electrode can be consumed, and a thin, continuous and compact lithium ion conductor coating layer with good conductivity is formed on the surface of the high-nickel ternary positive electrode material in situ, so that the development of the high-nickel ternary positive electrode material of the lithium ion battery is promoted. The high-nickel ternary positive electrode material prepared by the invention shows high specific capacity, excellent cycling stability, rate capability and first charge-discharge efficiency. Meanwhile, the preparation method provided by the invention is simple, rapid, efficient, convenient and low in cost, the residual alkali on the surface of the high-nickel ternary positive electrode material can be effectively removed, and the structural stability of the high-nickel ternary positive electrode material is improved.

The invention provides a silicon negative electrode material, a preparation method and a lithium ion battery, and relates to the technical field of battery negative electrode materials. Stable lithium compound nano-particles are deposited or converted on the inner wall of porous carbon, silicon or silicon oxide or silicon-lithium alloy is induced to form nano-particles in the vapor deposition process, and the nano-particles are distributed with the lithium compound nano-particles as the center. The lithium compound has a high boiling point, can stably provide crystallization sites for silicon during vapor deposition, and prevents agglomeration of silicon nanoparticles; the inorganic lithium compound is a lithium ion conductor, has high mechanical strength, can improve the dynamics of the silicon negative electrode during lithium intercalation and deintercalation, and slows down the expansion of the silicon negative electrode.

The invention discloses a composite interface layer, a preparation method thereof and an all-solid-state battery, belongs to the technical field of all-solid-state batteries, and solves the problems that the all-solid-state battery needs to operate under relatively high restraint pressure, and the battery performance is quickly reduced. The composite interface layer comprises a functional layer and a stress buffer layer, the functional layer comprises the following components in percentage by mass: 10%-50% of a ceramic fast lithium ion conductor, 20%-70% of an elastic polymer A and 0.1%-30% of a lithium salt A, the Poisson ratio of the functional layer is 0.01-0.3, and the Young modulus of the functional layer is 0.1-2 GPa; the stress buffer layer comprises the following components in percentage by mass: 65%-90% of an elastic polymer B, 1%-15% of a plasticizer and 0.1%-20% of lithium salt B, the Poisson ratio of the stress buffer layer is 0.2-0.5, and the Young modulus of the stress buffer layer is 0.01-0.5 GPa; and the elastic polymer B contains dynamic reversible chemical bonds.

Lithium manganese iron phosphate composite positive electrode particles with high strength conductive carbon are provided. [Solution] A composite positive electrode particle 200 includes an LMFP particle 121 and a conductive layer 122 that covers the outer surface of the LMFP particle. The conductive layer includes a plurality of carbon aggregates 123 and a plurality of lithium ion conductor particles 10. The plurality of carbon aggregates are formed by dehydrating carbohydrates, water-soluble fibers, or amino acid polymers. The plurality of lithium ion conductor particles are distributed inside the conductive layer, adjacent to the outside of the conductive layer, or adjacent to the outer surface of the LMFP particle. The lithium ion conductor particles are oxides or carbonates having lithium ion conducting ability, or oxides having a garnet or perovskite structure. The conductive layer further includes a plurality of conductive carbons 124.

An in-situ coated ternary positive electrode composite material, and the preparation and use thereof. The in-situ coated ternary positive electrode composite material comprises a ternary positive electrode base material and a fast ion conductor material, which is in-situ coated on and chemically bonded to the surface of the ternary positive electrode base material, wherein the ternary positive electrode base material is LiNi1-x-yCoxMnyO2, and the fast ion conductor material is Li2TiO3, where 0.02≤x+y≤0.67. By means of wet coating followed by lithium mixed sintering, the synchronous generation of an outer layer (Li2TiO3) and an inner layer (LiNi1-x-yCoxMnyO2) is realized, and the chemical bonding between the inner layer and the outer layer is achieved while the coating uniformity is improved, such that the coated lithium ion conductor Li2TiO3 is not prone to falling off during the charging and discharging of a battery, thereby finally improving the rate capability and the cycling performance of the ternary positive electrode composite material.

The invention belongs to the technical field of solid-state lithium metal batteries, and discloses an amorphous inorganic ion conductor and a preparation method and application thereof, and the preparation method comprises the following steps: uniformly mixing lithium tetrachloroaluminate and sodium tetrachloroaluminate to obtain a mixture; and melting the mixture to obtain a molten precursor, and cooling the molten precursor to room temperature to obtain the amorphous inorganic lithium ion conductor Li < x > Na < 1-x > AlCl4, x being greater than or equal to 0.15 and less than or equal to 0.85, wherein the amorphous inorganic lithium ion conductor Li < x > Na < 1-x > AlCl4 is used as an interface phase between a positive electrode of a solid-state lithium metal battery and a solid-state electrolyte. The amorphous LixNa1-xAlCl4 has the remarkable advantages that the preparation temperature is low, the crystal structure of the product can be controlled, the ionic conductivity of the product is high, and the compatibility with a solid electrolyte and a positive electrode material is good. The method is short in preparation period, low in cost and suitable for industrial application.

The invention provides a composite positive electrode material, a preparation method thereof, a positive electrode plate containing the composite positive electrode material, a battery and an electric device. The composite positive electrode material comprises a positive electrode active material and a coating layer, the coating layer coats at least part of the surface of the positive electrode active material, the coating layer comprises a composite material, the composite material comprises particles containing an M simple substance and a lithium ion conductor material attached to the surfaces of the particles containing the M simple substance, and M comprises at least one of S, Se and Te.

The invention discloses a solid electrolyte membrane for constructing a grain boundary bridge based on an APTES coupling agent and a preparation method of the solid electrolyte membrane, and belongs to the technical field of lithium batteries. According to the composite film, a gallium-doped lithium ion conductor is used as an inorganic phase, a polymer is used as an organic phase, APTES is added for ball milling, an APTES siloxane group is hydrolyzed to generate silanol, the silanol and hydroxyl on the surface of inorganic filler LGLZO are subjected to condensation, terminal amino and the polymer form a hydrogen bond, and a grain boundary bridge is successfully constructed. By adding the APTES coupling agent, the organic-inorganic interface compatibility can be enhanced, the growth of lithium dendrites can be inhibited, the interface impedance can be reduced, the interface stability and the lithium ion transmission efficiency can be improved, and the structural integrity and the electrochemical performance of the battery in the cycle process can be guaranteed; and important theoretical guidance and experimental basis are provided for structural design and performance optimization of the composite solid electrolyte membrane.

The invention belongs to the technical field of solid-state lithium metal batteries. The invention provides a mixed ion / electron conductor intermediate layer with a directional double-layer structure. The mixed ion / electron conductor intermediate layer comprises a titanium nitride nanotube array and lithium ion conductor layers deposited on the inner surface and the upper surface of the titanium nitride nanotube array. The lithium ion conductor layer on the upper layer of the directional double-layer structure mixed ion / electron conductor intermediate layer has high lithium ion conductivity and low electron conductivity, and can inhibit nucleation of lithium on an electrolyte interface and growth of lithium dendrites; the lower layer can guide lithium to realize uniform deposition and stripping in the nanotubes through a creep mechanism, and stress is effectively released, so that the electrochemical performance of the battery is improved; the creep path of lithium deposition stripping can be shortened, and the diffusion and transmission capability of lithium ions can be remarkably enhanced by matching with a lithium ion conductor with a high lithium ion diffusion rate; the middle layer is thin and controllable in thickness, the overall energy density of the battery is hardly reduced, and the application prospect is good.

The disclosed subject matter relates to solid state lithium ion conductors and batteries (such as pseudo solid state and all solid state batteries), and methods of making and use thereof. For example, disclosed herein are solid state lithium ion conductors comprising: Li3+2x+yzM [III+z]X6-x-yNxOy, wherein M is an alkali metal, an alkaline earth metal, a transition metal, a post transition metal, or a combination thereof; X is a halide; x is from 0 to 6; y is from 0 to 6; z is from -2 to 2; and [III+z] represents the valence of the M-ion(s); with the proviso that: M is not Li; 0 < x + y ≤ 6; and 0 < (3+2z+y-z) ≤ 6. Also disclosed herein are methods of making and use of any of the solid state lithium ion conductors disclosed herein, for example in devices such as a solid state battery.

The invention belongs to the technical field of lithium batteries, and particularly relates to a composite ceramic solid electrolyte diaphragm material and a preparation method and application thereof. Wherein the lithium ion conductor filler is LLZTO (lithium zinc oxide) nano particles coated with polydopamine; the mass dosage of the polydopamine is not more than 2 times that of the LLZTO nanoparticles, and the thickness of a coating layer formed by the polydopamine is less than 10nm. Compared with the prior art, the problems of dispersity and contact of nano solid electrolyte particles in a polymer substrate in the prior art are solved. According to the scheme, the contact interface of LLZTO nanoparticles and PVDF-HFP is optimized by introducing the interface layer and particularly utilizing the bidirectional cohesiveness of polydopamine, and the distribution of the nanofiller in a polymer is improved.

Provided is a means capable of improving lithium recovery efficiency. Provided is a lithium recovery method for recovering lithium from a lithium ion-containing aqueous solution, the method comprising: obtaining, from the lithium ion-containing aqueous solution and a gas, a mixture of a lithium ion-concentrated aqueous solution and a gas hydrate; separating the gas hydrate from the mixture to obtain the lithium ion-concentrated aqueous solution; and disposing the lithium ion-concentrated aqueous solution on one main surface side of a lithium ion conductor, disposing recovery water on the other main surface side, and transmitting lithium ions contained in the lithium ion-concentrated aqueous solution from the one main surface side to the other main surface side to obtain a lithium ion recovery aqueous solution.

The invention provides a super-amphiphilic coating capable of conducting lithium ions, a preparation method and application of the super-amphiphilic coating, a diaphragm, a pole piece and a lithium ion battery, and relates to the technical field of batteries. The invention provides a super-amphiphilic coating capable of conducting lithium ions. The super-amphiphilic coating comprises an amphiphilic material and a lithium ion conductor nano material, the surface of the lithium ion conductor nanometer material is coated with the amphiphilic material. Wherein the lithium ion conductor nanometer material provides good lithium ion conduction performance, the amphiphilic material coating layer and the lithium ion conductor nanometer material form a micro-nano structure, and super-oleophylic and super-hydrophilic capabilities can be provided. Therefore, the super-amphiphilic coating provided by the invention can be used as a coating of a diaphragm and a current collector of a lithium ion battery, and the super-amphiphilic coating has extremely high electrolyte affinity, so that the back absorption of an electrolyte can be accelerated, the liquid absorption capacity of a battery cell is improved, and meanwhile, the exertion of electrochemical performance is not influenced; and the micro-nano structure and the polymer component of the super-amphiphilic coating have relatively good liquid retention capability, so that the extrusion of electrolyte in the expansion process can be relieved.

The invention discloses a solid-state electrolyte material and a preparation method and application thereof, the solid-state electrolyte material can be used for manufacturing a solid-state battery, and the solid-state electrolyte material comprises a shell layer and an inner core wrapped in the shell layer; the component of the inner core is a lithium ion conductor; the shell layer isolates the inner core from outside air, and the shell layer sublimates / decomposes and is removed from the solid electrolyte material after heat treatment. The preparation method comprises the following steps: preparing the solid-state electrolyte core, and forming the shell on the surface of the solid-state electrolyte core through a chemical vapor deposition method by taking the shell component as a raw material. According to the invention, a'coating-thermal decomposition regeneration 'dynamic regulation and control mechanism is adopted, and the contradiction that a solid electrolyte needs a protective layer for storage and a battery needs a clean interface' is thoroughly solved, so that the solid electrolyte material disclosed by the invention has extremely high convenience and relatively low cost during production, transportation and processing; and the electrochemical performance of the battery can be ensured not to be influenced when the material is used for preparing the solid-state battery.

The invention discloses a current collector compositely modified by a polymer / metal-based oxyhalide and application of the current collector in a lithium metal battery, and the current collector is prepared by using the polymer and the metal-based oxyhalide as raw materials to prepare slurry and coating the surface of the current collector of the lithium metal battery with the slurry. A solid electrolyte interface (SEI) layer rich in lithium oxyhalide (Li3OX, X = Cl, Br, I) fast ion conductors is generated in situ through metal-based oxyhalide and lithium metal. The composite interface protection layer formed by the polymer organic component and the metal-based oxyhalide inorganic component has excellent flexibility, can adapt to the volume change of lithium metal in the charging and discharging process, guarantees the integrity and mechanical properties of an SEI layer, and inhibits the growth of lithium dendrites; in addition, in-situ formation of a lithium oxyhalide-rich fast lithium ion conductor can promote fast diffusion and transfer of lithium ions, and the long-term cycle performance of the lithium metal battery under high rate is improved.

The present invention relates to a composite material for a cathode active material comprising a multi-component olivine material and to a method for preparing same. More specifically, the present invention provides a composite material for a cathode active material and a method for preparing same, the composite material comprising: a lithium transition metal phosphate core having an olivine structure and mixed with a lithium ion conductor; and a hybrid coating layer including a lithium ion conductor and a carbon material, and formed on at least a portion or all of the core. Accordingly, a lithium secondary battery using the composite material can exhibit superior electrical performance.

The invention discloses a bimetal doped high ion conduction ceramic solid electrolyte, which comprises an LATP solid electrolyte formed by an NASICON type lithium ion conductor of Li1. 3AL0. 3Ti1. 7 (PO4) 3, and Ti < 4 + > in the LATP solid electrolyte is replaced by metal ions. The invention belongs to the technical field of solid-state batteries, and particularly relates to a bimetallic-doped high-ion-conduction ceramic solid-state electrolyte.

The invention discloses a composite solid electrolyte membrane and a preparation method thereof, and belongs to the field of solid-state batteries. The electrolyte has a sandwich composite structure and comprises a middle main body layer, a first functional layer and a second functional layer. The middle main body layer is composed of an inorganic lithium ion conductor, a lithium salt and a binder; the first functional layer is composed of a polymer base film and a lithium supplement agent, and inhibits the electron conductivity and compensates the loss of active lithium in the cycle process through the coordination of double mechanisms of electron blocking and active lithium compensation; the second functional layer is composed of a polymer base membrane and a molecular sieve filler; the composite solid electrolyte membrane is simple in preparation process, controllable in cost and capable of achieving mass production, self-discharge can be effectively inhibited by adopting the composite solid electrolyte membrane, meanwhile, high-efficiency transmission of lithium ions is maintained, the cycle life of the battery is remarkably prolonged, the electrochemical performance is excellent, and the application prospect is wide. The method can play an important role in the fields of consumer electronics, electric automobiles, energy storage systems, low-altitude flight and the like.

The present disclosure relates to the technical field of lithium extraction from a salt lake, and provides a ceramic membrane electrolytic bath for extracting lithium from a salt lake by means of electrical de-intercalation, and an electrolysis device and method for extracting lithium from a salt lake by means of electrical de-intercalation. In the present disclosure, a lithium ion conductor ceramic membrane is used as a bottom wall and a side wall, so as to form a ceramic membrane electrolytic bath, such that the ceramic membrane electrolytic bath has the effect of preferentially selectively permeating Li+. The ceramic membrane electrolytic bath provided in the present disclosure can be arranged in brine of an electrolysis device for extracting lithium from a salt lake by means of electrical de-intercalation; water is added to the ceramic membrane electrolytic bath; a lithium-intercalated electrode is placed as a cathode therein; and Li+ in the brine moves towards the cathode under the action of an electric field, is preferentially separated from other impurity cations by means of the ceramic membrane electrolytic bath and is preliminarily enriched in pure water, thereby reducing the influence of the impurity cations on the electrical de-intercalation process. The preparation method for a lithium-ion ceramic membrane is simple and easy for large-scale production, and has a low cost.

This invention provides an LLATO@ferroelectric phase NBTO solid electrolyte material, its preparation method, and its application, belonging to the field of lithium-ion solid electrolyte technology. This invention employs a sol-gel method for mixing and calcination to synthesize NBTO ferroelectric phase-coated LLATO lithium-ion conductors (Li). 0.33 La 0.457 Ag 0.1 TiO3@ x wt% Na 0.5 Bi 0.5 TiO3 (0< x ≤6). The LLATO@ferroelectric phase NBTO solid electrolyte material of the present invention exhibits excellent comprehensive performance, with a room temperature ionic conductivity of σ=1.08×10⁻⁶. ‑3 S / cm, relative to the room temperature ionic conductivity of the uncoated LLATO solid electrolyte (1.54 × 10⁻⁶). ‑4 The voltage (S / cm) is improved by an order of magnitude. In lithium symmetric battery tests, it maintains stable cycling after 2000 charge-discharge cycles at 0.1 mA and maintains stable voltage output at 1 mA.

A composite positive material and a preparation method therefor, a positive electrode plate comprising same, a battery, and an electrical apparatus. The composite positive electrode material comprises a positive electrode active material and a coating layer, wherein the coating layer coats at least part of the surface of the positive electrode active material, the coating layer comprises a composite material, the composite material comprises particles containing elemental M and a lithium-ion conductor material attached onto the surface of the particles containing elemental M, and M comprises at least one of S, Se and Te.