Abstract: This application relates to a lithium-ion battery, including a positive electrode, a negative electrode, and an electrolyte, where the negative electrode includes a negative electrode current collector and a negative electrode active material layer containing a negative electrode active material attached to at least one surface of the negative electrode current collector, where an average width-to-length ratio of particles of the negative electrode active material is 0.1-1; an ionic conductivity of the electrolyte is 7-15 mS/cm; and a negative electrode lithiation capacity to positive electrode delithiation capacity ratio CB is 1.05-1.5. An electric apparatus including such lithium-ion battery is also disclosed. The lithium-ion battery has a large-rate fast charging capability and good cycling performance.

Abstract: A battery cell includes an electrolyte, positive and negative electrode plates, and a separator between the positive and negative electrode plates. The electrolyte includes a lithium salt including lithium hexafluorophosphate, a mass percentage of which with respect to a total mass of the electrolyte ranges from 15% to 20%. The positive/negative electrode plate includes a positive/negative electrode current collector and a positive/negative electrode film layer provided on at least one side of the positive/negative electrode current collector and containing a positive/negative electrode active material. The negative electrode active material includes a carbon-based material and a silicon-carbon composite. A mass percentage of silicon in the silicon-carbon composite with respect to a total mass of the negative electrode active material is greater than or equal to 0.3% and less than or equal to 10.0%.

Abstract: A battery cell includes an electrolyte, positive and negative electrode plates, and a separator provided between the positive and negative electrode plates. The electrolyte includes a lithium salt including lithium hexafluorophosphate, a mass percentage of which with respect to a total mass of the electrolyte ranges from 15% to 20%. The positive/negative electrode plate includes a positive/negative electrode current collector and a positive/negative electrode film layer provided on at least one side of the positive/negative electrode current collector and containing a positive/negative electrode active material. The negative electrode active material contains carbon and silicon. A mass percentage of silicon with respect to a total mass of the negative electrode active material is greater than or equal to 0.3% and less than or equal to 3.0%.

Abstract: A display circuit includes a plurality of current source branches and a plurality of pixel branches. Each current source branch includes a first transistor and a control circuit. Each pixel branch includes a second transistor, a pulse width control switch transistor, and a pixel unit that are connected in series. The turned-on first transistor and the turned-on second transistor form a current mirror structure. In the current mirror structure, there is a proportional relationship between a current flowing through each of the plurality of first transistors and a current flowing through the turned-on second transistor. Whether each first transistor is turned on is controlled through the control circuit, to adjust a value of the current flowing through each pixel unit through the second transistor.

Abstract: A battery cell includes a housing, an electrode assembly, and an electrolyte solution. An accommodation cavity is formed in the housing. The electrode assembly is disposed in the accommodation cavity. The electrolyte solution is disposed in the accommodation cavity. An electrolyte retention coefficient a and a packing fraction b of the battery cell satisfy the following relationship: 2?a/b?3, and the electrolyte retention coefficient a is in units of g/Ah.

Abstract: An electrolyte includes a first additive having a chemical formula of R((CH3)mSi)n, where R includes at least one of phosphate ester group, phosphite group, borate group, amine group, isocyanate group, fluorine atoms, oxygen atoms, and sulfur atoms, m is 1, 2, or 3, and n is 1, 2, or 3.

Abstract: The present application relates to a lithium ion battery and a power consuming device, the lithium ion battery comprising a positive electrode, a negative electrode and an electrolyte solution, wherein the electrolyte solution has a viscosity c of 1-6 mPa·s at 25° C., as measured in accordance with GB/T10247-2008; and the ratio CB of the lithium intercalation capacity of the negative electrode to the delithiation capacity of the positive electrode is 1.05-1.5. The lithium ion battery has high-rate fast charging capability and good cycling performance.

Abstract: Provided are a secondary battery and a method of preparing the secondary battery. The secondary battery includes a positive electrode plate and an electrolytic solution, wherein the positive electrode plate includes a positive electrode current collector and a positive electrode film layer provided on at least one surface of the positive electrode current collector, the positive electrode film layer has a porosity of P, the electrolytic solution includes a dehydrating additive, and based on a total mass of the electrolytic solution, a mass percentage of the dehydrating additive in the electrolytic solution is a, and the secondary battery satisfies: 0.2?(a*100)/P?3.5. The secondary battery of the present application has improved initial direct current resistance (DCR) and high temperature cycle performance while having an improved porosity to balance high energy density and good dynamics.

Abstract: Provided are a secondary battery, a battery module, a battery pack and an electric device. The secondary battery includes an electrode assembly and an electrolytic solution configured to infiltrate the electrode assembly, wherein the electrode assembly includes a negative electrode plate, a separation film and a positive electrode plate, and the negative electrode plate includes a negative electrode current collector and a negative electrode material layer located on at least one surface of the negative electrode current collector; and by setting a tortuosity of the negative electrode plate as ?, the ? satisfies Formula I below: ?=0.5(?)????Formula I where, ? is a porosity of the negative electrode material layer, and ? is a Bruggeman index of the negative electrode material layer, and the ? and a conductivity ? of the electrolytic solution satisfy Formula II below: (2?)0.5+6???(2?)0.5+10??Formula II. Therefore, the secondary battery has an excellent fast-charging performance.

Abstract: Provided a battery, a method for preparation thereof and an electrical device containing the same, wherein the battery includes a positive electrode plate and an electrolytic solution, the positive electrode plate including a positive electrode current collector and the positive electrode current collector including a conductive layer, and the electrolytic solution includes a first anion and a second anion, the first anion includes an anion selected from hexafluorophosphate anions, the second anion includes one ore more selected from anions shown in Formula 1 and an anion shown in Formula 2. The present application can improve the safety performance of the battery while enabling the battery to have good electrochemical performance.

Abstract: This application relates to the field of AR technologies, and in particular, to AR glasses and an AR glasses system. The AR glasses further include an optical receiver/transmitter, a light propagation medium, a power supply apparatus, and a photovoltaic apparatus. The optical receiver/transmitter is configured to emit light. The optical receiver/transmitter is disposed on a frame. The light propagation medium is configured to guide propagation of the light emitted by the optical receiver/transmitter, and the light propagation medium is disposed on an eyeglass. The power supply apparatus is configured to provide electric energy for the AR glasses. The photovoltaic apparatus is configured to absorb light that does not enter the light propagation medium, and convert light energy into electric energy. The photovoltaic apparatus is electrically connected to the power supply apparatus, and the electric energy generated by the photovoltaic apparatus is transmitted to the power supply apparatus.

Abstract: The present application provides a battery cell, a battery, and an electrical apparatus, the battery cell comprising a positive electrode plate, a negative electrode plate, a separator, and an electrolyte solution. The positive electrode plate comprises a positive electrode current collector and a positive electrode active material layer arranged on at least one side of the positive electrode current collector. The negative electrode plate comprises a negative electrode current collector and a negative electrode active material layer arranged on at least one side of the negative electrode current collector. The separator is arranged between the positive electrode plate and the negative electrode plate. The positive electrode active material layer, the negative electrode active material layer, the separator, and the electrolyte solution satisfy a relationship of: 50 ? M? · cm 2 ? T ? 1 P ? 1 + T ? 2 P ? 2 + T ? 3 P ? 3 G ? 300 ? M ? ? · cm 2 .

Abstract: A micro-light emitting diode (MicroLED) display screen includes a MicroLED array substrate, where a plurality of pixels are set in the MicroLED array substrate, and the plurality of pixels include at least a first subpixel and a second subpixel; a light scattering structure, prepared above the first subpixel, and configured to scatter first emitting light generated by the first subpixel; a light conversion structure, prepared above the second subpixel, and configured to convert second emitting light generated by the second subpixel; and a metal isolation structure, prepared between the light scattering structure and the light conversion structure, where the light scattering structure, the light conversion structure, and the metal isolation structure are located at a same layer.

Abstract: A battery cell includes a housing, an electrode assembly, and an electrolyte solution. An accommodation cavity is formed in the housing. The electrode assembly is disposed in the accommodation cavity. The electrolyte solution is disposed in the accommodation cavity. An electrolyte retention coefficient a and a packing fraction b of the battery cell satisfy the following relationship: 2?a/b?3, and the electrolyte retention coefficient a is in units of g/Ah.

Abstract: The present disclosure relates to a lithium-ion battery including a first electrolytic solution and a second electrolytic solution. The first electrolytic solution and the second electrolytic solution satisfies 0.1?[(d2×t2)/(d1×t1)]?11, where d1 is a mass of the first electrolytic solution, d2 is a mass of the second electrolytic solution, t1 is a ratio of a mass of an additive of the first electrolytic solution to a mass of the first electrolytic solution, and t2 is a ratio of a mass of an additive of the second electrolytic solution to a mass of the second electrolytic solution.

Abstract: The present application discloses a lithium-ion battery, which has a positive electrode sheet, a negative electrode sheet, a separator, and an electrolyte solution comprising a lithium salt and a solvent, wherein based on the total weight of the electrolyte solution, the percentage by mass of the lithium salt in the electrolyte solution is a %, and the lithium ion battery satisfies 5?a?10; and the load on single side of the negative electrode sheet is W grams per 1540.25 mm2, and a and W satisfy 25?a/W?50; and the solvent comprises dimethyl carbonate. The lithium ion battery has good safety and high-temperature cycling performance, and also has good kinetic performance.

Abstract: The present disclosure provides a circCDK13-enriched engineered small extracellular vesicle (E-sEV), and a preparation method and use thereof, and belongs to the technical field of biomedicine. The present disclosure provides a preparation method of the circCDK13-enriched E-sEV. In the present disclosure, human placenta-derived mesenchymal stem cells (hP-MSCs) are infected with a vector overexpressing circCDK13, and a resulting cell supernatant is collected to obtain a small extracellular vesicle (sEV) overexpressing the circCDK13, which is used for wound healing in diabetes mellitus (DM). The E-sEV shows a therapeutic effect on DM wounds that is significantly better than that of natural small extracellular vesicles (N-sEVs) secreted by the hP-MSCs. This product not only exhibits advantages in healing speed, but also has a greater application potential in stimulating skin appendage regeneration and improving the quality of wound healing.

Abstract: The present disclosure belongs to the technical fields of genetic engineering and biotherapeutic drugs, and relates to an engineered exosome for treating hypertrophic scar (HTS), and a preparation method and use thereof. In the present disclosure, the engineered exosome for treating HTS is a mesenchymal stem cell (MSC)-derived exosome overexpressing miR-141-3p. The exosome can significantly reduce formation of the HTS.

Abstract: The present disclosure discloses an autophagosome for promoting healing of a diabetic wound, and a preparation method and use thereof. In the preparation method of the autophagosome provided in the present disclosure, the autophagosome is extracted from a starved vascular endothelial cell, and the production of the autophagosome does not require induction by an additional reagent. The preparation method of the present disclosure involves simple extraction conditions, does not require an ultracentrifuge, and can be implemented in an ordinary laboratory. In addition, a yield of the autophagosome is higher than a yield of an exosome. The present disclosure provides an easy-to-implement and low-cost treatment method without toxic and side effects for a patient suffering from a chronic refractory wound. The autophagosome of the present disclosure can promote healing of a diabetic wound, and reduce physiological and psychological burdens caused by a diabetic wound to a patient.

Abstract: A secondary battery, a battery module, a battery pack, and an electrical device are disclosed. The secondary battery includes a positive electrode plate including a positive electrode film layer, a negative electrode plate including a negative electrode film layer, an electrolytic solution, and a solid electrolyte; the solid electrolyte is disposed on a surface of the positive and/or negative electrode film layer and includes a polymer matrix and a first additive, and the first additive is configured to form an interface film on the surface of the positive and/or negative electrode film layer, where a mass percentage of the polymer matrix relative to a total mass of the solid electrolyte is denoted as A %; and a mass percentage of the first additive relative to the total mass of the solid electrolyte is denoted as B %, and the secondary battery satisfies 0.1?B/A?19.