Abstract: This application provides a current collector and a preparation method thereof, a secondary battery, a battery module, a battery pack, and an electric apparatus. The current collector includes a metal substrate and a surface treatment layer formed on at least one side of the metal substrate, where the surface treatment layer includes oxide and/or nitride of the metal substrate. The surface treatment layer can protect the metal from corrosion by anions in the electrolyte solution or optimize the metal nucleation behavior, improve the coulombic efficiency and cycle capacity retention rate of the battery, and improve the storage performance of the battery.

Abstract: This application provides an electrolyte for sodium secondary battery, a sodium secondary battery, a battery module, a battery pack, and an electric apparatus. The electrolyte for sodium secondary battery includes an ester solvent and a mixture solvent, where the mixture solvent includes one or more of a fluoroether diluent, a flame retardant, and ionic liquid. The electrolyte of this application includes the ester solvent and the mixture solvent including one or more of the fluoroether diluent, the flame retardant, and the ionic liquid, so that the interface stability of a battery can be significantly enhanced, the cycling performance and storage stability of the battery can be improved, and the safety of the battery can be improved.

Abstract: System and techniques for vehicle operation safety model (VOSM) grade measurement are described herein. A data set of parameter measurements—defined by the VOSM—of multiple vehicles are obtained. A statistical value is then derived from a portion of the parameter measurements. A measurement from a subject vehicle is obtained that corresponds to the portion of the parameter measurements from which the statistical value was derived. The measurement is then compared to the statistical value to produce a safety grade for the subject vehicle.

Abstract: The present application provides an electrolytic solution for magnesium batteries, a method for preparing the same, and a magnesium battery, comprising a non-aqueous solvent and an electrolyte salt, wherein the non-aqueous solvent is selected from one or more of imidazole ionic liquids, pyrrole ionic liquids, piperidine ionic liquids, ether compounds, ester compounds, pyridine compounds, nitrile compounds, sulfone compounds, or ketone compounds; the electrolyte salt has a chemical formula [MgmLinXo(HMDS)2m+m?oRp]·Mq.

Abstract: A high-voltage winding (130) includes a winding body (1310), a high-voltage coil (1320), and a high-voltage insulating layer (1330). A wire is wound on the winding body (1310) to form the high-voltage coil (1320), and the high-voltage insulating layer (1330) is wrapped around the high-voltage coil (1320) and the winding body (1310).

Abstract: A preparation method includes the following steps: S1, preparing an aqueous solution of a metal salt and an aqueous solution of a precipitant, where the precipitant includes one or more selected from oxalic acid and a water-soluble oxalate; S2, mixing the aqueous solution of the precipitant and the aqueous solution of the metal salt at a shear speed of 10000 r/min or more for co-precipitation reaction; and S3, after the reaction is completed, obtaining the positive electrode active material precursor via washing and drying.

Abstract: The present application provides a carbonaceous material and a preparation method therefor, and a secondary battery and an electrical device comprising the same. The carbonaceous material has 0.13?A/B?0.50, wherein A represents a mass of water vapor adsorbed on the carbonaceous material after a water vapor adsorption test by placing the carbonaceous material under constant temperature and humidity conditions of 25° C. and 100% RH for 100 h, and B represents an initial mass of the carbonaceous material. The present application can simultaneously improve the capacity and initial coulombic efficiency of the carbonaceous material.

Abstract: The present application provides an electrolytic solution for rechargeable magnesium batteries, a method for preparing the same, and a rechargeable magnesium battery, wherein the electrolytic solution comprises an electrolyte salt and a non-aqueous solvent, the electrolyte salt comprising [MgxM2x-1Py][Mg(ORF)3Qz], in which x represents an integer between 1 and 6, y represents an integer between 1 and 6, z represents an integer between 0 and 6, M represents a monovalent anion, and each RF independently represents partially fluorinated or perfluorinated C1-C6 aliphatic hydrocarbon group, or partially fluorinated or perfluorinated C6-C12 aromatic hydrocarbon group, and P and Q represent an ligand. The electrolytic solution provided by the present application has excellent electrochemical properties, and at the same time the interfacial stability between the electrolytic solution and the negative electrode is also high.

Abstract: The present application relates to an EPA-EE nano-lipid composition and a formulation, a preparation method, and an application thereof. The EPA-EE nano-lipid composition includes a raw material having a high content of EPA-EE as a primary ingredient and includes an emulsifier containing a highly unsaturated phospholipid. The EPA-EE nano-lipid composition can be prepared into a sub-micron emulsion at nanoscale for use as an oral formulation.

Abstract: A method for preparing the ammonium manganese iron phosphate precursor includes mixing and grinding metal source powder and phosphorus source powder to enable a low-heating-temperature solid-state reaction of each component, and then washing and drying the obtained product to obtain the ammonium manganese iron phosphate precursor, where the metal source includes an iron source, a manganese source and an optional source of a doping element M which represents doping elements at manganese and iron sites, and the phosphorus source includes triammonium phosphate.

Abstract: A composite positive electrode active material, a method for preparing the same, and an electric device are described. The method includes: providing positive electrode active material particles; providing a solid aluminum salt to make the solid aluminum salt cover a surface of the positive electrode active material particles; and providing a solid base to the positive electrode active material particles covered by the solid aluminum salt to make the solid aluminum salt and the solid base undergo an in situ solid-phase chemical reaction and generate a cladding layer covering the surface of the positive electrode active material particles, to obtain the composite positive electrode active material, wherein the cladding layer has alumina nanoparticles. The prepared alumina can uniformly cover the surface of the positive electrode active material particles, protect the positive electrode active material, and ensure the electrochemical performance of the positive electrode active material.

Abstract: The present disclosure relates to the technical field of vehicles, and provides a cable assembly and a vehicle charging system. The cable assembly includes: a power supply plug, adapted to a discharging outlet of a discharging vehicle; a charging plug, adapted to a charging outlet of a to-be-charged vehicle; and a cable, connected between the power supply plug and the charging plug.

Abstract: A positive electrode active material, including a boron-doped Prussian blue analog; and the Prussian blue analog has a chemical formula of AaMbM?c(CN)6·dH2O, in which A includes at least one of an alkali metal cation, an alkaline earth metal cation, Zn2+, and Al3+, M and M? each independently includes at least one of Ni ion, Cu ion, Fe ion, Mn ion, Co ion, and Zn ion, and H2O is coordination water, 0<a?2, 0<b?1, 0<c?1, 0?d?2; and relates to a preparation method, a secondary battery, and an electrical device. The stability of the positive electrode active material is improved, and thus improving a cycle performance of the corresponding secondary battery; and the preparation method of the positive electrode active material is simple in operation, mild in reaction conditions, and convenient for industrial application.

Abstract: A carbonaceous material contains element O, where the content of element O of the carbonaceous material tested by X-ray photoelectron spectroscopy is denoted as A, the content of element O of the carbonaceous material tested by elemental analysis is denoted as B, and the carbonaceous material satisfies A/B?3 and 5 wt %?A?20 wt %.

Abstract: A carbonaceous material where in the CO2 adsorption test of the carbonaceous material, the total CO2 adsorption at 0° C. and a relative pressure P/P0 between 10?8 and 0.029 is recorded as A, the adsorption time is recorded as B, and the carbonaceous material satisfies: A/B?1.7 cm3/(g×h) STP, where STP is the standard condition, P represents the test pressure of CO2, and P0 represents the saturated vapor pressure of CO2 at 0° C.

Abstract: A carbonaceous material has an adsorption velocity v that satisfies 0.015?v?0.050 when subjected to an adsorption test using water vapor at a constant temperature and humidity of 25° C. and 40% RH. The water vapor adsorption test is performed under the following conditions: in a constant temperature and humidity chamber at 25° C. and 40% RH, the carbonaceous material with a mass of m1 is placed in a container, and a water vapor adsorption mass m2 and a water vapor adsorption time t are recorded when the water vapor adsorption of the carbonaceous material reaches equilibrium, and the water vapor adsorption velocity is v=m2/(m1×t), where mi is measured in g, m2 is measured in g, and t is measured in h.

Abstract: The present application provides an organic-inorganic hybrid complex which can be used in a coating of a separator for a secondary battery, wherein the organic-inorganic hybrid complex is formed from basic units represented by formula (I) being periodically assembled in at least one spatial direction: [Lx-i?i][MaCb].Az (I), wherein a defect percentage expressed in i/x*100% is 1% to 30%. The present application further provides a coating composition comprising the organic-inorganic hybrid complex, a coating formed from the coating composition, a separator comprising the coating for a secondary battery, a secondary battery comprising the separator, a battery module, a battery pack and a device. By applying the organic-inorganic hybrid complex of the present application in a coating, the electrolyte infiltration of a separator for a secondary battery is improved while increasing the electrolyte retention rate, thereby improving the rate capability and cycling life of the secondary battery.

Abstract: System and techniques for vehicle operation safety model (VOSM) compliance measurement are described herein. A subject vehicle is tested in a vehicle following scenario against VOSM parameter compliance. The test measures the subject vehicle activity during phases of the following scenario in which a lead vehicle slows and produces log data and calculations that form the basis of a VOSM compliance measurement.

Abstract: Disclosed are an application of a coronavirus SARS-CoV-2 vaccine polypeptide, a polypeptide composition and a nanoemulsion preparation thereof in the prevention of coronavirus SARS-CoV-2 wild and mutant strain infections. Specifically, provided is a coronavirus SARS-CoV-2 vaccine polypeptide having an amino acid sequence derived from an S protein of SARS-CoV-2 wild and mutant strains, the vaccine polypeptide can enable the body to generate high-level and durable humoral immune responses against SARS-CoV-2 and to produce high titers of RBD-binding antibodies and neutralizing antibodies that block the binding of RBD to ACE2. The vaccine polypeptide can be used to prevent infections of SARS-CoV-2 wild strain and B.1.1.7, B.1.351, B.1.617, B.1.1.529 and other mutant strains.

Abstract: The present disclosure provides anti-human CD33 bromo- and extra-terminal domain degrader antibody-drug conjugates, including compositions and methods of using such antibody-drug conjugates.