Abstract: A lithium ion secondary battery negative electrode additive includes polyaspartate salt and water.

Abstract: The present invention provides a negative electrode of lithium ion secondary battery, a preparation method thereof and a lithium ion secondary battery. The negative electrode of the lithium ion secondary battery comprises a negative electrode active material, a pre-lithiated conductive layer and a negative electrode current collector. By using the negative electrode of lithium ion secondary battery, the preparation method thereof and the lithium ion secondary battery of the present invention, technical effects of excellent electrochemical performance, especially excellent first discharge capacity and first time efficiency are achieved, and excellent negative electrode plate binding force is achieved.

Abstract: The present invention provides a composite cathode active material, which comprises a core layer comprising a cathode active material; a hydrogen fluoride barrier layer coating the core layer, the hydrogen fluoride barrier layer comprising a substance consisting of any one of Nb, Ba, Zr, Mn, Mg, Al and Ca or any combination thereof and any one of O, F, B and P or any combination thereof; and a physical barrier layer coating the hydrogen fluoride barrier layer. By using the composite cathode active material, preparation method thereof, cathode sheet and lithium ion secondary battery of the present invention, the contacting and reacting of the hydrogen fluoride with cathode active material are effectively prevented, the dissolution of the metal in the cathode active material is inhibited, the stability of the crystal structure in the bulk phase of the cathode active material is ensured, and the increase of the cycle retention rate and the decrease of the impedance growth rate are realized.

Abstract: The present disclosure provides a negative electrode additive for a lithium ion secondary battery and a negative electrode slurry containing the same. The negative electrode additive for a lithium ion secondary battery contains one of a lignin-based substance or a humic acid-based substance or a combination thereof. By means of the negative electrode additive for a lithium ion secondary battery and the negative electrode slurry for a lithium ion secondary battery containing the same of the present disclosure, effects of improving electrical performance of a lithium ion secondary battery at normal temperature and at a low temperature, and improving peel strength of the lithium ion secondary battery are achieved.

Abstract: The present disclosure provides a negative electrode additive for a lithium ion secondary battery and a negative electrode slurry containing the same. The negative electrode additive for a lithium ion secondary battery contains one of a lignin-based substance or a humic acid-based substance or a combination thereof. By means of the negative electrode additive for a lithium ion secondary battery and the negative electrode slurry for a lithium ion secondary battery containing the same of the present disclosure, effects of improving electrical performance of a lithium ion secondary battery at normal temperature and at a low temperature, and improving peel strength of the lithium ion secondary battery are achieved.

Abstract: The present disclosure provides a positive electrode active material for a lithium ion secondary battery. The positive electrode active material includes a material represented by LiCo(1????)A(?)B(?)O2, wherein the material is configured to have good cycling performance and thermal stability at high charging voltages, and to inhibit expansion of the secondary battery. The present disclosure further provides a positive electrode and a secondary battery using the same positive electrode active material.

Abstract: In one example embodiment, a core-shell type platinum-containing catalyst is allowed to reduce the amount of used platinum and has high catalytic activity and stability. In one example embodiment, the core-shell type platinum-containing catalyst includes a core particle (with an average particle diameter R1) made of a non-platinum element and a platinum shell layer (with an average thickness ts) satisfying 1.4 nm?R1?3.5 nm and 0.25 nm?ts?0.9 nm. The core particle includes an element satisfying Eout?3.0 eV, where average binding energy relative to the Fermi level of 5d orbital electrons of platinum present on an outermost surface of the shell layer is Eout. In a fuel cell including a platinum-containing catalyst which contains a Ru particle as a core particle, the output density at a current density of 300 mA/cm2 is 70 mW/cm2 or over, and an output retention ratio is approximately 90% or over.

Abstract: A core-shell type platinum-containing catalyst being allowed to reduce the amount of used platinum and having high catalytic activity and stability and a method of producing the same, an electrode and an electrochemical device are provided. The platinum-containing catalyst includes: metal particles each including a core particle including a metal atom except for platinum or an alloy of a metal atom except for platinum and a shell layer, including platinum on a surface of the core particle, the metal particles being supported by a conductive carrier and satisfying 0.25 nm?ts?0.9 nm and 1.4 nm?R1?3.5 nm, where an average thickness of the shell layer is ts and an average particle diameter of the core particle is R1.

Abstract: In one example embodiment, a core-shell type platinum-containing catalyst is allowed to reduce the amount of used platinum and has high catalytic activity and stability. In one example embodiment, the core-shell type platinum-containing catalyst includes a core particle (with an average particle diameter R1) made of a non-platinum element and a platinum shell layer (with an average thickness ts) satisfying 1.4 nm?R1?3.5 nm and 0.25 nm?ts?0.9 nm. The core particle includes an element satisfying Eout?3.0 eV, where average binding energy relative to the Fermi level of 5d orbital electrons of platinum present on an outermost surface of the shell layer is Eout. In a fuel cell including a platinum-containing catalyst which contains a Ru particle as a core particle, the output density at a current density of 300 mA/cm2 is 70 mW/cm2 or over, and an output retention ratio is approximately 90% or over.