133 results about "Interfacial resistance" patented technology

The invention provides high-wettability glass powder, a preparation method of the high-wettability glass powder and BC battery conductive silver paste, and belongs to the technical field of photovoltaic battery paste. The glass powder comprises the following components in parts by mass: 50-60 parts of a first component, wherein the first component is PbO and Bi2O3; 30 to 40 parts by mass of a second component, wherein the second component is TeO2 and SiO2; the third component is prepared from the following components in parts by mass: Li2CO3, Na2CO3 and K2CO3; and 0.1 to 5 parts by mass of a fourth component, wherein the fourth component is at least one of MoO3, In2O3, SeO2, WO3, Al2O3 and ZnO. The glass powder disclosed by the invention has good wettability, and the problems of high interface resistance and low filling factor caused by non-uniform thickness of a glass layer in the prior art are solved.

Methods of making an integrated electrode-separator component for a lithium-sulfur electrochemical cell are provided. A liquid dispersion comprising aramid nanofibers (ANF) is sprayed onto an active material layer comprising at least one electroactive material to form a sprayed layer that defines an integrated electrode-separator component having an interfacial resistance between the sprayed layer and the active material layer of less than or equal to about 10 Ω·cm2. An electrode-separator component and lithium-sulfur electrochemical cell are also provided.

A backside contact includes an extension region and may further include an inline region. The inline region is below a source / drain region may the extension region extends horizontally generally underneath an adjacent source / drain region. The adjacent S / D region may be connected to a frontside back end of line (BEOL) network by a frontside contact. The extension region may provide for relatively increased surface area for a backside wire of a backside BEOL network to connect thereto, which may relatively decrease the interfacial resistance therebetween and which may ease alignment and / or landing complexities of the backside wire against the backside contact. The extension region may further allow for relatively increased backside wire pitch between backside wires of the backside BEOL network, which may reduce the propensity of shorting between the backside wires.

Provided herein is a modified current collector for a secondary battery, comprising a substrate and a conductive layer applied on one side or both sides of the substrate, wherein the conductive layer comprises a conductive material and binder material, wherein the binder material comprises a copolymer. Also provided herein is an electrode for a secondary battery, comprising the modified current collector and an electrode layer, wherein the electrode layer is located on the surface of the conductive layer(s). Within an electrode comprising the modified current collector disclosed herein, the presence of the conductive layer inhibits corrosion of the substrate and reduces interfacial resistance between the electrode layer and the substrate. Consequently, batteries comprising such an electrode exhibit exceptional electrochemical performance.

The invention discloses a confinement composite nano-enzyme enhanced electrochemiluminescence immunosensor for detecting tumor necrosis factors and a construction method and application of the immunosensor. The immunosensor is a three-electrode system, and liquid to be detected contains luminol; wherein the working electrode is obtained by covalently immobilizing a tumor necrosis factor specific antibody after an SNF epoxy modified electrode is subjected to confinement of Ni (OH) 2-CeO2 composite nano-enzyme and then closing a non-specific site. The Ni (OH) 2-CeO2 composite nano-enzyme is confined in a nano-channel, the Ni (OH) 2-CeO2 composite nano-enzyme and the nano-channel can synergistically accelerate the process of an oxygen reduction reaction, the modification stability of the nano-enzyme is effectively improved, and a formed immune complex causes increase of interface resistance and steric hindrance of a sensing electrode to cause signal reduction; therefore, high-sensitivity detection of the tumor necrosis factor is realized, and the constructed sensor has the advantages of low detection limit, wide detection range and the like, and is very suitable for being widely applied to the fields of auxiliary clinical diagnosis, large-scale screening, health monitoring and the like.

The invention belongs to the field of new material preparation and electrochemical energy storage, and particularly relates to a micron silicon composite material for an all-solid-state battery and a preparation method and application of the micron silicon composite material. The electronic conductor and the micron silicon are calcined to form a conductive framework, then the conductive framework is compounded with the ionic conductor, the electronic / ionic conductivity is synergistically improved, specifically, the electronic conductivity is improved by doping the electronic conductor, and an effective buffer layer is provided for volume expansion of the micron silicon material; the doped ion conductor effectively reduces the diffusion barrier of lithium ions, promotes the rapid transmission of the lithium ions, improves the interface contact between the silicon negative electrode and the electrolyte, reduces the interface resistance, enables the lithium ions to be uniformly embedded, and obtains a stable SEI layer. The fast ion-electron conductor doping method balances the electron conductivity and ion transmission, when the obtained composite material is used as a negative electrode, the discharge capacity of an all-solid-state battery under 10C multiplying power reaches 97.9 mAh / g, the 200-time cycle capacity retention rate is 82.5%, the composite material is obviously superior to a traditional silicon-based negative electrode, and the composite material has a wide application prospect.

The invention belongs to the field of solid-state sodium batteries and relates to an all-solid-state sodium battery. The all-solid-state sodium battery sequentially comprises a negative electrode layer, a middle layer, a solid electrolyte layer and a positive electrode layer, the intermediate layer is selected from beta ''-Al2O3; the solid electrolyte layer is selected from amorphous sulfur-doped halide, the chemical general formula of the amorphous sulfur-doped halide is Na < 1 + x > TaCl < n > A < 6-x-n > S < x >, in the formula, A is a mixture of at least one of Br, I and F, and 0 lt; and n is greater than or equal to 5 and less than or equal to 5.5. According to the all-solid-state sodium battery disclosed by the invention, through the arrangement of the beta ''-Al2O3 intermediate layer, the interface reaction between the solid electrolyte layer and the negative electrode can be effectively inhibited, and sodium dendrites are inhibited. The amorphous sulfur-doped halide solid electrolyte Na < 1 + x > TaCl < n > A < 6-x-n > S < x > has high sodium ion conductivity and high voltage resistance, and is beneficial to inhibition of interface reaction with a positive electrode; the Na1 + xTaClnA6-x-nSx and the beta ''-Al2O3 intermediate layer have good interface stability, so that the interface reaction is inhibited, the interface resistance is reduced, and the all-solid-state sodium battery has excellent safety performance and long cycle life.

The invention provides a perovskite thin film with a sandwich structure, a preparation method and application of the perovskite thin film and a perovskite solar cell, and belongs to the technical field of perovskite solar cells. According to the invention, the EDTA-2Na passivation layer is arranged between the ZnO electron transport layer and the perovskite layer, and EDTA-2Na and zinc ions on the surface of ZnO form a stable complex, so that the surface activity of ZnO is reduced, and the reaction between ZnO and methylamine lead iodide is inhibited; the EDTA-2Na can also enhance the interface bonding force between ZnO and perovskite, improve the interface contact state, reduce the interface resistance and facilitate the transmission and collection of charges; by limiting the thickness of the EDTA-2Na passivation layer, the function of the EDTA-2Na passivation layer can be fully played, and the situation that electron transmission is affected by the too thick passivation layer and the passivation effect is not obvious if the passivation layer is too thin is avoided.

This invention provides a functional current collector, its preparation method, and its application, belonging to the field of battery materials technology. The functional current collector comprises a stacked metal layer, a metal-carbon composite layer, and a carbon layer. Starting from the material and structural design of the functional current collector, this invention introduces a metal-carbon composite layer between the carbon layer and the metal layer. This not only reduces the amount of metal used and increases energy density but also enhances mechanical properties, achieving excellent flexibility and tensile strength. Furthermore, the metal-carbon composite layer significantly reduces interfacial resistance and improves the adhesion between the carbon layer and the metal layer. In addition, the metal-carbon composite layer exhibits good resistance to electrolyte corrosion, improving the stability of each interface and ensuring good structural stability of the functional current collector, thus enhancing its stability during battery use. The bipolar battery prepared based on this method exhibits excellent cycle performance.

The present invention relates to a positive electrode including a positive electrode active material layer including a first positive electrode active material and a second positive electrode active material having an average particle diameter different from each other, in which the average particle diameter D50 of the first positive electrode active material is larger than the average particle diameter D50 of the second positive electrode active material, the first positive electrode active material and the second positive electrode active material include single-particle-type particles, the interface resistance of the positive electrode having a SOC of 50% measured in a coin half cell manufactured using the positive electrode is 6.5 Omega to 8.5 Omega, and the interface resistance of the positive electrode having a SOC of 10% measured in a coin half cell manufactured using the positive electrode is 15 Omega to 19 Omega.

This invention provides an anode material, its preparation method, and its application. The anode material includes a silicon-carbon material and a modified coating layer covering the surface of the silicon-carbon material. The silicon-carbon material includes a core and a carbon layer covering the surface of the core. The core includes porous carbon and silicon deposited in the pores of the porous carbon. The modified coating layer, in the direction away from the silicon-carbon material, sequentially includes a first coating layer and a second coating layer. The first coating layer is made of tin and tin sulfide, and the second coating layer is made of a tin-modified sulfide solid electrolyte. Tin compensates for irreversible capacity loss and improves first-time efficiency. Tin and tin sulfide have high ionic conductivity, and the "point-to-surface" conductive network formed by tin and the carbon layer can significantly reduce interfacial resistance. The plasticity of the tin-modified sulfide solid electrolyte itself can optimize the interfacial contact between the anode and the electrolyte, reduce interfacial impedance, and buffer the volume expansion stress of the silicon material during charging and discharging. The synergistic effect of the above structures can effectively suppress the volume expansion of the silicon material.

This invention provides a lithium-sulfur silver-germanium ore-based multiphase solid-state electrolyte material, its preparation method, and its application, relating to the field of solid-state battery technology. The multiphase solid-state electrolyte material comprises a metal / oxygen co-doped lithium-sulfur silver-germanium ore phase as a matrix, with heterogeneous disulfide nanoparticles dispersed at the grain boundaries of this matrix. This invention utilizes a lithium-sulfur silver-germanium ore-type solid-state electrolyte with high ionic conductivity as the matrix material and introduces high-valence metals and oxygen elements for co-doping, promoting the formation of sulfur vacancies and reducing the lithium-ion diffusion barrier. Simultaneously, the interfacial effect of the heterogeneous disulfide nanoparticles at the grain boundaries helps reduce the internal interfacial resistance of the electrolyte, further improving lithium-ion conduction efficiency. Furthermore, the high electronegativity of the high-valence metals and oxygen elements, along with the in-situ passivation effect of the heterogeneous disulfide, significantly enhances the stability of the electrolyte under high-voltage conditions, reduces side reactions between the electrolyte and the cathode material, and improves the overall cycle performance of the battery.

The present application provides a solid electrolyte, a secondary battery, a battery module, a battery pack, and a power consumption device, in which the contact angle of molten sodium on the surface of the solid electrolyte is less than 82°, which is advantageous for improving the interfacial wettability between the solid electrolyte and the positive electrode plate / negative electrode plate, reducing the interfacial resistance, improving the interfacial dynamics, and improving the low-temperature performance of the battery.

The invention discloses a fuel cell interface contact resistance testing method, and belongs to the technical field of fuel cell testing. The testing method comprises the following steps: assembling testing units, namely sequentially stacking and assembling a first electrode, a first gas diffusion layer, a first polar plate, a second polar plate, a second gas diffusion layer and a second electrode to obtain the symmetrically distributed testing units; applying current, namely applying current to the test unit through a direct-current power supply and an ampere meter; interface resistance is measured, an interface to be measured is selected, the voltage between blocks on the two sides of the interface to be measured is measured through a voltmeter, and the interface resistance is obtained through calculation; and calculating the interface contact resistance according to a formula. The contact resistance of each interface of the fuel cell can be accurately measured, and a basis is provided for performance optimization of the fuel cell.

The invention relates to the technical field of lithium batteries, in particular to a solid-state battery cell and a preparation method thereof.The solid-state battery cell comprises a negative electrode piece and a solid-state electrolyte, the negative electrode piece comprises a negative electrode active material, a negative electrode conductive agent and a negative electrode binder, the surface of the negative electrode active material contains sulfydryl, the negative electrode conductive agent contains a linear conductive agent, and the solid-state electrolyte is contained in the negative electrode conductive agent. The negative electrode binder contains a polymer A, the polymer A is obtained by polymerizing an acrylic monomer, an acrylonitrile monomer and a sulfydryl-containing monomer, and the solid electrolyte is obtained by injecting a preparation raw material B into the battery cell, standing and heating and curing; and the preparation raw material B comprises a flexible chain segment, fluorinated acrylate, carbonic ester containing a carbon-carbon unsaturated bond, an amine substance, a lithium salt, a plasticizer and a free radical initiator. According to the invention, the polymer A is used as a binder, the polymer A and the linear conductive agent form winding coating on the negative electrode active material, and the in-situ curing technology of the cell layer surface is combined, so that the negative electrode expansion and the interface resistance are reduced, and the high energy density and the high safety performance are further realized.

The present invention relates to an all-solid-state battery structure and a manufacturing method therefor, the structure comprising: a pressing jig including first and second plates facing each other; an all-solid-state battery interposed between the first and second plates; and a pad positioned between the first plate and the all-solid-state battery and / or between the second plate and the all-solid-state battery, wherein the pad sequentially includes a first pad and a second pad having different hardnesses, the second pad being closer than the first pad to the all-solid-state battery, and the ratio of Shore A hardness of the second pad to Shore A hardness of the first pad is 1.8 to 5. Pressurization can be uniform and all-solid-state battery damage is controlled while interfacial resistance between layers is lowered, and thus an all-solid-state battery structure having excellent discharge capacity characteristics, high-rate discharge efficiency and cycle performance, and a manufacturing method therefor can be provided.

This invention discloses a functionalized carbon coating slurry for lithium batteries and its preparation method, relating to the field of lithium battery materials technology. The method includes the following steps: preparing a multifunctional aminobenzoate-modified polyacrylate copolymer aqueous dispersion, comprising polymerizing monomers including acrylic acid, butyl acrylate, and ethyl para-aminobenzoate intermediates via free radical copolymerization; preparing a conductive pre-dispersion, comprising mixing a conductive agent, a dispersant, and deionized water under high-speed shear dispersion conditions; and preparing the functionalized carbon coating slurry, comprising mixing the conductive pre-dispersion with the multifunctional aminobenzoate-modified polyacrylate copolymer aqueous dispersion under planetary stirring conditions, followed by static degassing. This invention achieves chemical bonding between the coating components through a multifunctional binder, significantly improving coating adhesion, toughness, and high-temperature stability, while reducing interfacial resistance, thus comprehensively improving the battery's cycle performance, rate performance, and processing reliability.

Provided are: a binder in which the interfacial resistance between a current collector and an electrode material layer in a positive electrode of a sodium ion battery is reduced; and an electrode mixture, an electrode, and a secondary battery using the binder. A binder for the positive electrode of a sodium ion battery, which contains a copolymer (A) having a vinylidene fluoride unit and a tetrafluoroethylene unit, and which is characterized in that the content of the vinylidene fluoride unit is 30-99.5 mol% with respect to the total monomer units in the copolymer (A).

The present invention provides: a solid electrolyte (19) with which it is possible to reduce the interfacial resistance; an ion conductor (10); a sheet (15); and a power storage device (11). The solid electrolyte has a garnet-type crystal structure that contains Li, La, Zr, and O, and when the spectrum emitted from the surface of the solid electrolyte is measured by X-ray photoelectron spectroscopy, the value obtained by dividing the abundance ratio of C by the sum of the abundance ratio of La and the abundance ratio of Zr is less than 3.1. The ion conductor includes the solid electrolyte and an electrolyte solution (23) which is obtained by dissolving a lithium salt in a nonaqueous solvent. The sheet includes the ion conductor and a binder for binding the solid electrolyte. The power storage device includes the solid electrolyte.

The invention provides a water electrolysis hydrogen production membrane electrode, a preparation method thereof and an electrolytic bath, and belongs to the technical field of water electrolysis hydrogen production, the water electrolysis hydrogen production membrane electrode comprises a composite anode layer, an anion exchange membrane and a composite cathode layer, and the composite anode layer comprises an anode substrate layer, a first gas diffusion layer and an anode catalyst layer. The anion exchange membrane is arranged on the side, provided with the anode catalyst layer, of the composite anode layer, the composite cathode layer is arranged on the side, away from the composite anode layer, of the anion exchange membrane, and the composite cathode layer comprises a cathode substrate layer, a second gas diffusion layer and a cathode catalyst layer. According to the water electrolysis hydrogen production membrane electrode provided by the embodiment of the invention, interface resistance among at least part of components can be eliminated, so that ion transmission and gas diffusion are smoother, and the electrolysis efficiency is improved.

To provide a dry electrode having high dispersibility of a conductive material.SOLUTION: The dry electrode obtained by the manufacturing method according to the present disclosure has high dispersibility of the conductive material in the electrode active material layer. Accordingly, when the content of the conductive agent in the electrode is constant, the internal resistance of the electrode active material layer and the interfacial resistance with the current collector are reduced as the dispersibility is higher. Also, in a case in which the dry electrode having high dispersibility is applied to a battery, since ohmic resistance is reduced during the operation of the battery, a voltage drop may be improved, and high output efficiency may be improved. In a case in which the dispersibility of the conductive agent is extremely poor, the deterioration of the electrode active material may be non-uniform depending on the position in the electrode, which is disadvantageous for the life characteristics of the battery. In addition, the evaluation tool according to the present invention can confirm the dispersibility of the conductive material in the electrode as a quantitative value.SELECTED DRAWING: Figure 1

The invention discloses an organic-inorganic composite solid-state battery electrolyte and a preparation device, and relates to the field of lithium batteries. The invention relates to an organic-inorganic composite solid-state battery electrolyte, which comprises an organic-inorganic composite solid-state battery electrolyte, the electrolyte is prepared by stirring and compounding an organic polymer matrix, an inorganic solid electrolyte material, an ionic liquid and an additive, the particle size and composition of the inorganic solid electrolyte material are optimized, the ionic conductivity is remarkably improved through the synergistic effect of the inorganic solid electrolyte material, the organic polymer matrix and the ionic liquid, and the electrolyte has good flexibility and strength due to the compounding of the organic polymer matrix and the inorganic material and the addition of the additive; the solid electrolyte can adapt to the volume change of the battery, the interface contact between the electrolyte and an electrode material is improved by selecting proper organic polymers and additives, the interface resistance is reduced, the growth of lithium dendrites is effectively inhibited, the solid electrolyte is non-flammable and non-volatile, and the safety of the battery is greatly improved.

According to an embodiment, an electrode is provided, comprising a current collector and an active material layer located on the current collector. The active material layer contains an active material and a conductive agent. The active material comprises a lithium nickel cobalt manganese composite oxide. The specific surface area S of the active material layer obtained by nitrogen adsorption is... BET The specific surface area S of the micropores containing the active material layer obtained by mercury intrusion porosimetry Hg Satisfying 0.8 BET / S Hg The relationship is <2.0. The volume resistivity R of the layer containing the active material is... V The interfacial resistance R at the interface between the current collector and the layer containing the active material is below 10 Ω·cm. I 0.5Ω·cm 2 Below. Volume resistivity R V With interface resistance R I The ratio of R V / R I 3cm ‑1 Above and 20cm ‑1 the following.​

This invention discloses an oil-based conductive slurry, its preparation method, and its application. The oil-based conductive slurry comprises an oil-based solvent, a conductive material, and an oil-based binder. The oil-based binder is polyvinylidene fluoride (PVDF), and the conductive material is one or a mixture of several of acetylene black, Ketjen black, conductive carbon black, conductive graphite, graphene, and carbon nanotubes. The oil-based conductive slurry is coated on both sides of an aluminum foil and dried to obtain a coating on the aluminum foil, resulting in a carbon-coated current collector. The carbon-coated current collector is used to prepare a positive electrode sheet. The uniform distribution of the conductive material in the oil-based solvent forms a continuous conductive network, which effectively reduces the surface resistance of the aluminum foil, promotes rapid electron conduction, and improves the charge / discharge efficiency and energy density of the battery. The formation of a conductive carbon layer between the aluminum foil and the positive electrode coating reduces the interfacial resistance and improves conductivity.

The invention provides a positive electrode material and a preparation method thereof, a pole piece and a secondary battery. The positive electrode material comprises porous carbon and lithium manganese iron phosphate powder embedded in the porous carbon, wherein the average particle size of the lithium manganese iron phosphate powder is 100 nm to 500 nm; through the confinement effect of the porous carbon on the lithium manganese iron phosphate powder, the size and the morphology of the lithium manganese iron phosphate powder are more uniform; moreover, the contact interface resistance of the nanoscale lithium manganese iron phosphate powder and the porous carbon is relatively low, so that uniform dispersion of the lithium manganese iron phosphate powder in the porous carbon is facilitated, and effective transportation of lithium ions among pores of the porous carbon can be realized; therefore, the technical problem of poor charging and discharging performance of the battery caused by poor conductivity of the lithium manganese iron phosphate is solved.

The application belongs to the technical field of solid-state battery manufacturing, and relates to a manufacturing method of a low-interface-resistance solid-state battery, comprising the following steps: 1) preparing a positive electrode material, a solid-state electrolyte material and a negative electrode material; 2) preparing composite positive electrode powder and solid-state electrolyte raw material based on the prepared positive electrode material and solid-state electrolyte material respectively; 3) forming a solid-state battery positive electrode and a solid-state battery electrolyte by using an indirect 3D printing process respectively; 4) assembling the formed solid-state battery positive electrode and solid-state battery electrolyte to form an assembly; and 5) introducing the negative electrode material to the assembly to form a solid-state battery. The application provides a manufacturing method of a low-interface-resistance solid-state battery which can improve interface wettability, can improve ion conductivity and can realize batch manufacturing.

The present invention discloses a method for preparing a fiber separator for batteries with excellent high-temperature resistance and flame retardant properties through electrospinning. The method comprises adding polyacrylonitrile, boric acid, melamine, and exfoliated boron nitride nanosheets to N,N-dimethylformamide to obtain a polymer spinning solution with good dispersibility, and then preparing the fiber separator using electrospinning technology. The preparation conditions of the present invention are simple and mild. Melamine and boron nitride nanosheets improve the high-temperature resistance and tensile strength of the separator, and boric acid effectively improves the flame retardant properties of the separator. The obtained fiber separator has a thickness of 70 to 90 μm, an interconnected pore structure, high tensile strength and low area thermal shrinkage, higher ionic conductivity and electrolyte absorption, and relatively low interfacial resistance. A lithium-ion battery assembled with the separator achieved a high stable capacity retention rate at 0.5C during 400 cycles, and has the potential for application in energy storage devices such as lithium-ion secondary batteries with high power, high-temperature resistance, and excellent flame retardant properties.

The present invention discloses a method for manufacturing NCM positive electrode particles coated with LLZO and glass phase by using a sintering process, wherein the manufacturing process of the positive electrode particles comprises the following steps: Step 500: taking a plurality of large NCM particles and a glass phase material and placing them into a first mixer to uniformly mix the two; the glass phase material is a lithium ion conductivity higher than 10 ‑5 S / cm amorphous solid electrolyte; step 510: oxygen sintering the mixed NCM large particles with the glassy material to form NCM large particles with a glassy layer; step 520: placing a plurality of LLZO fine particles and the NCM large particles with a glassy layer into a second mixer for mixing to form composite NCM large particles; step 530: then oxygen sintering the composite NCM large particles to eliminate the interfacial resistance between the LLZO fine particles and the NCM large particles during lithium ion transmission, thereby forming a plurality of sintered powders. The process also includes step 540 of mixing the sintered powders with a carbon material.

The invention relates to the technical field of battery manufacturing, and discloses a battery welding process based on screw fixation and soldering tin conduction, and the process comprises the following steps: applying a solid dormant soldering flux composition to a to-be-connected area, and curing to form a film; the connecting piece is fixed through cold pressing and riveting, and the scaling powder film is broken through mechanical force so as to expose the internal active agent in situ; low-temperature welding flux is preset on the base part of the connecting piece; and local low-temperature heating is conducted, so that the welding flux is melted and infiltrated under the action of the active agent, and a conductive path is formed. The composition comprises a frangible polymer matrix and an active agent coated by the matrix. A force and chemical cooperation mechanism is established, the scaling powder is activated through mechanical force, and the technical problem that the surface of the aluminum alloy is difficult to wet by low-temperature solder is solved; and meanwhile, local low-temperature heating avoids thermal damage of high temperature to the battery cell, and safe and reliable battery connection with high mechanical strength and low interface resistance is realized.

The invention provides a lithium ion secondary battery. The electrolyte in the lithium ion secondary battery comprises an isothiocyanate additive; the oxidation potential of the isothiocyanate additive is 3.7 to 4.1 V, the fluorine ion affinity is-11 to-7 kcal / mol, and the LUMO (lowest unoccupied molecular orbital) energy level is-2.2 to-1.1 eV; the positive electrode active material of the positive plate comprises LiaNixCoyMzAdO2, wherein 0.85 < = a < = 1, 0.8 < = x < = 1, 0.05 < = y < = 0.15, 0 < z < = 0.05, and 0 < = d < = 0.05; m comprises Mn and / or Al, and A comprises at least one of Mg, Ca, Sr, Ba, Al, Sc, Ga, In, Ti, Zr, Sn, Hf, Ta, Nb, W, Mo, V, Cr, Y, La, Ce, Pr and Nd. The lithium ion secondary battery has excellent cycle performance and relatively low interface resistance at a high temperature.