Abstract: A polymer comprises repeating units represented by formula (I): -M-R-Y- formula (I), wherein in the formula (I), M is selected from substituted or unsubstituted anilino, substituted or unsubstituted carbazolyl, substituted or unsubstituted acridinyl, substituted or unsubstituted phenothiazinyl or substituted or unsubstituted phenoxazinyl; R is selected from substituted or unsubstituted C1-C10 alkyl; and Y is selected from carboxyl or a salt thereof, a phosphoric acid group or a salt thereof, or a sulfonic acid group or a salt thereof.

Abstract: Embodiments of the present application provide a lithium metal negative electrode, a preparation method therefor and related lithium metal battery and device. The lithium metal negative electrode may comprise: a negative electrode current collector; at least one lithium-based metal layer provided on at least one surface of the negative electrode current collector; and an ion-conducting polymer modification layer, which is located on the surface of one of the at least one lithium-based metal layer and comprises at least catalytic amount of a Lewis acid, the Lewis acid containing cations of a metal capable of forming an alloy-type active material with lithium.

Abstract: This application discloses a method for recovering lead iodide from a perovskite solar battery, and a recycling system. The method for recovering lead iodide from a perovskite solar battery includes the following steps: pretreating a recycled perovskite solar battery to obtain perovskite; putting the perovskite into a second solvent to dissolve lead iodide to obtain a lead iodide-containing solution; and mixing the lead iodide-containing solution with a third solvent to precipitate the lead iodide, and collecting a lead iodide precipitate. A boiling point of the third solvent is lower than a boiling point of the second solvent. The recycling system for recovering lead iodide from a perovskite solar battery includes: a recycled perovskite solar battery stripping apparatus, a lead iodide extraction apparatus, and a lead iodide precipitate separation apparatus.

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: A method for forming a hole transport layer on a surface of a substrate includes providing M target materials comprising inorganic hole transport materials and forming the hole transport layer on the surface of the substrate using magnetron sputtering. The hold transport layer at least comprises N consecutive sub-layers. M and N are integers and 2?N?M. One of the M target materials is a doped target material further comprising a doping material.

Abstract: The present application provides a positive electrode active material which may be in a particulate form and comprise a compound represented by Formula 1: NaxAyM1[M2(CN)6]?·zH2O??Formula 1 wherein, A is selected from at least one of an alkali metal element and an alkaline earth metal element, and the ionic radius of A is greater than the ionic radius of sodium; M1 and M2 are each independently selected from at least one of a transition metal element, 0<y?0.2, 0<x+y?2, 0<??1, and 0?z?10; and the particles of the positive electrode active material may have a gradient layer in which the content of the A element decreases from the particle surface to the particle interior.

Abstract: The present application discloses a perovskite solar cell, a thin-film composite electrode and a preparation method therefor, a power generating device, and a power consuming device. The perovskite solar cell sequentially includes transparent conductive glass, a first charge transport layer, a perovskite light-absorbing layer, a second charge transport layer and a thin-film composite electrode; wherein the thin-film composite electrode comprises a first metal layer provided on the second charge transport layer, a conductive oxide layer provided on the first metal layer, and a second metal layer provided on the conductive oxide layer. In a perovskite solar cell of an embodiment of the present application, the thin-film composite electrode is a semi-transparent electrode, which increases the extraction rate of charge carriers at the interface and reduces the overall series resistance of the device, thus enabling the device to have an excellent photoelectric performance while ensuring the transparency thereof.

Abstract: A hard carbon. A total quantity of adsorbed nitrogen under a relative pressure P/P0 of nitrogen between 10?8 and 0.035 is V1 cm3 (STP)/g and a total quantity of adsorbed nitrogen under a relative pressure P/Po of nitrogen between 0.035 and 1 is V2 cm3 (STP)/g in a nitrogen adsorption isotherm determined at a temperature of 77 K for the hard carbon. The hard carbon satisfies: V2/V1?0.20 and 20?V1?150, where P represents an actual pressure of nitrogen, and P0 represents a saturated vapor pressure of nitrogen at a temperature of 77 K.

Abstract: An electrolyte for a lithium-ion battery, a lithium-ion battery, a battery module, a battery pack, and an apparatus are provided. The electrolyte includes an organic solvent, an electrolyte lithium salt dissolved in the organic solvent, and an additive, where the additive is a compound represented by following formula I. The electrolyte can inhibit generation of lithium dendrites in the lithium-ion battery, improve cycle performance of the battery, and also improve flame retardancy of the battery, thereby effectively resolving defects in the existing technology.

Abstract: A perovskite solar cell includes a perovskite layer comprising a first surface and a second surface that are opposite each other in the thickness direction thereof; a hole transport layer provided on the first surface; and an electron transport layer provided on the second surface. The electron transport layer comprises at least two sub-layers and a doping material, and each of the sub-layers has a conduction band bottom energy level lower than that of the hole transport layer and a valence band top energy level lower than that of the hole transport layer.

Abstract: A perovskite solar cell and a preparation method therefor, and a power consuming device. The perovskite solar cell comprises a bottom electrode, a perovskite layer and a top electrode, wherein the perovskite layer comprises several layers of sub-perovskite films arranged in stack, and the band gaps of two adjacent layers of the sub-perovskite films are different.

Abstract: The present application provides an organic compound and use thereof, a passivation film, a solar battery, and an electrical apparatus. The organic compound is as shown in formula (1) or is an oxyacid radical salt of the compound as shown in formula (1), wherein Ar is selected from any one of substituted or unsubstituted aryl with 6 to 50 ring atoms, substituted or unsubstituted heteroaryl with 5 to 50 ring atoms, or substituted arylamino as shown in formula (A); L is selected from acyclic alkylene with 1 to 10 carbon atoms; and R1 is an oxyacid group. The organic compound is capable of improving photon-to-electron conversion efficiency and stability of a solar battery device.

Abstract: A perovskite solar cell includes a transparent electrode, an electron transport layer, a perovskite layer, a hole transport layer, and a second electrode in sequence. The perovskite layer includes a main perovskite layer and a two-dimensional perovskite coating layer covering both surface and periphery of the main perovskite layer. The two-dimensional perovskite coating layer includes a first overlay layer disposed between the main perovskite layer and the electron transport layer, a second overlay layer disposed between the main perovskite layer and the hole transport layer, and a third overlay layer covering the periphery of the main perovskite layer.

Abstract: Provided are a perovskite battery, a method for preparing same, and a photovoltaic module containing same. The perovskite battery includes: a first electrode; a second electrode; a perovskite layer, located between the first electrode and the second electrode; an organic hole transport layer, located between the first electrode and the perovskite layer; and an inorganic hole transport layer, located between the organic hole transport layer and the perovskite layer. A thickness H1 of the inorganic hole transport layer and a thickness H2 of the organic hole transport layer satisfy H1/H2?0.4. The inorganic hole transport layer includes an inorganic hole transport material. The inorganic hole transport material is selected from inorganic P-type semiconductor materials that are soluble in N,N-dimethylformamide under a room temperature at a solubility lower than 0.10 mg/mL.

Abstract: Provided are an ionic compound and an application thereof, a perovskite precursor solution, a perovskite material, a solar material, a solar cell, and an electric apparatus. The ionic compound has a structure represented by any one of formulas (1) to (3). The ionic compound can improve the stability of perovskite materials and thus improve the efficiency and stability of solar cells.

Abstract: A solar cell includes a plurality of sub-cells. The plurality of sub-cells are disposed sequentially along a first direction. The plurality of sub-cells each include a first photovoltaic conversion layer for performing photovoltaic conversion. The first direction is perpendicular to a thickness direction of the sub-cells. Along the first direction, a trend of change in a thickness of the first photovoltaic conversion layer of each sub-cell is negatively correlated to a trend of change in a cross-sectional area, perpendicular to the thickness direction, of each first photovoltaic conversion layer, so as to improve uniformity of photocurrents output by the sub-cells and uniformity of electrical current.

Abstract: This application provides a separator, an electrical apparatus containing such separator, and preparation methods thereof. The separator includes a coating layer containing an organic-inorganic hybrid composite compound and provides improved performance in a number of aspects, and the organic-inorganic hybrid composite compound is formed by periodically assembling, along at least one spatial direction, basic units expressed by formula I, Lx(MaCb)y·Az. This application further provides a battery and electrical device containing such separator, preparation methods thereof, organic-inorganic hybrid composite compound for improving performance of a separator.

Abstract: Embodiments of the present application provide a battery production system and a battery production method. The battery production system includes: a preheating apparatus, including a preheating cavity, a first delivery mechanism being arranged in the preheating cavity, and the preheating cavity having a first charging door and a first discharging door; and a baking apparatus, including a baking cavity, the baking cavity having a second charging door and a second discharging door, wherein the first delivery mechanism is configured to deliver a battery piece in the preheating cavity to the baking cavity through the first discharging door and the second charging door when the first discharging door and the second charging door are opposite and are both opened.

Abstract: The present application provides a hard carbon, a method for preparing the same, a secondary battery comprising the same, and an electrical apparatus comprising the same, where an amount of generated CO2 is detected in thermal programmed desorption-mass spectrum (TPD-MS) to be less than or equal to 1.0 mmoL/g and an amount of generated CO is detected in thermal programmed desorption-mass spectrum to be less than or equal to 2.0 mmoL/g, when the hard carbon is heated from 50° C. to 1,050° C. The present application can improve both the capacity and the first coulomb efficiency of the hard carbon.

Abstract: This application relates to a solar cell and a manufacturing method thereof, a photovoltaic module, and an electrical device. The solar cell includes: a plurality of sub-cells, where the plurality of sub-cells are electrically connected to each other; a dead zone, disposed between two adjacent sub-cells; a reflection portion, disposed on at least a part of surfaces of the dead zone, and configured to reflect incident light radiated on the dead zone; a packaging component, disposed on a side of the reflection portion away from the dead zone, and configured to reflect the incident light, which is reflected by the reflection portion, to a surface of the sub-cell to convert the incident light into electrical energy.