Abstract: A compound having the formula (I): is disclosed. A method of preparing the compound of formula (I) is also disclosed.

Abstract: A compound having the formula (I): is disclosed. A method of preparing the compound of formula (I) is also disclosed.

Abstract: A battery cell, including a first electrode plate, a second electrode plate, a separator, and a first electrode tab. The separator is disposed between the first electrode plate and the second electrode plate. The first electrode plate, the second electrode plate, and the separator are wound along a length direction of the first electrode plate. The first electrode tab is located at an end in a width direction of the first electrode plate. In the length direction of the first electrode plate, the first electrode plate includes a first edge, and a first notch is disposed at the first edge.

Abstract: An electrolyte includes a dinitrile compound, a trinitrile compound, and propyl propionate. Based on the total weight of the electrolyte, the content X of the nitrile compound and the content Y of the trinitrile compound meet the conditions represented by Formula (1) and Formula (2): {about 2 wt %?(X+Y)?about 11 wt % . . . (1), about 0.1?(X/Y)?about 8 . . . (2)}. The trinitrile compound includes at least one selected from the group consisting of: 1,3,5-pentanetricarbonitrile; 1,2,3-propanetrinitrile; 1,3,6-hexanetricarbonitrile; 1,2,6-hexanetricarbonitrile; 1,2,3-tris(2-cyanoethoxy)propane; 1,2,4-tris(2-cyanoethoxy)butane; 1,1,1-tris(cyanoethoxymethylene)ethane; 1,1,1-tris(cyanoethoxymethylene)propane; 3-methyl-1,3,5-tris(cyanoethoxy)pentane; 1,2,7-tris(cyanoethoxy)heptane; 1,2,6-tris(cyanoethoxy)hexane; and 1,2,5-tris(cyanoethoxy)pentane.

Abstract: An electrolyte including a dinitrile compound, a trinitrile compound, and propyl propionate. Based on the total weight of the electrolyte, the content X of the nitrile compound and the content Y of the trinitrile compound meet the conditions represented by Formula (1) and Formula (2): {about 2 wt %?(X+Y)?about 11 wt % . . . (1), about 0.1?(X/Y)?about 8 . . . (2)}. The electrolyte further includes at least one selected from the group consisting of a cyclic carbonate ester having a carbon-carbon double bond, a fluorinated chain carbonate ester, a fluorinated cyclic carbonate ester, and a compound having a sulfur-oxygen double bond. The electrolyte is capable of effectively inhibiting the increase in DC internal resistance of an electrochemical device so that the electrochemical device has excellent cycle and storage performance.

Abstract: A method of preparing a Lilac Ginkgo Brick Tea includes the following steps: (1) mixing and drying fresh Lilac leaves and Ginkgo leaves to obtain a Lilac Ginkgo Tea; (2) fermenting the Lilac Ginkgo Tea to obtain a Fermented Lilac Ginkgo Tea; (3) mixing the Fermented Lilac Ginkgo Tea with a black tea to obtain a Fermented Lilac Ginkgo Tea Mixture; and (4) processing the Fermented Lilac Ginkgo Tea Mixture to obtain the Lilac Ginkgo Brick Tea.

Abstract: A negative electrode including a negative electrode active material layer and an additive. The additive includes a metal sulfide. The additive is distributed in the negative electrode active material layer, and/or distributed on the surface of the negative electrode active material layer. The negative electrode effectively improves the performance of the lithium ion battery, and greatly improves the capacity and cycle performance of the lithium ion battery.

Abstract: The present application relates to an electrolyte and an electrochemical device comprising the electrolyte. The electrolyte comprises a dinitrile compound, a trinitrile compound, and propyl propionate, wherein, based on the total weight of the electrolyte, the content X of the nitrile compound and the content Y of the trinitrile compound meet the conditions represented by Formula (1) and Formula (2): {about 2 wt %?(X+Y)?about 11 wt % . . . (1), about 0.1?(X/Y)?about 8 . . . (2)}. The electrolyte of the present application is capable of effectively inhibiting the increase in DC internal resistance of an electrochemical device so that the electrochemical device has excellent cycle and storage performance.

Abstract: A wound-type cell includes a first electrode plate; a second electrode plate; a separator, disposed between the first electrode plate and the second electrode plate; a first electrode tab electrically connected to the first electrode plate; and a second electrode tab electrically connected to the second electrode plate, in which the separator includes a third winding start end, the third winding start end is folded back to an inner side in a thickness direction and is disposed between the first electrode tab and the second electrode tab in a length direction.

Abstract: A coiled battery cell, comprises: a first electrode plate, the first electrode plate comprising a first active material layer, the first active material layer completely covering two surfaces of the first electrode plate; an outermost circle of the coiled battery cell is a separator, the separator in the outermost circle is adjacent to the first electrode plate. A battery comprising the coiled battery cell is further disclosed. The purpose is to at least reduce the risk of short circuit as a result of tearing or breaking of the aluminum foil in the outer layer when the cell is dropped.

Abstract: The present application provides a lithium ion battery and a negative electrode thereof. The negative electrode comprises: a negative electrode active material layer and an additive comprising a metal sulfide, wherein the additive is distributed in the negative electrode active material layer, distributed on the surface of the negative electrode active material layer, or both in the negative electrode active material layer and on the surface of the negative electrode active material layer. The negative electrode of the present application may effectively improve the performance of the lithium ion battery, and greatly improve the capacity and cycle performance of the lithium ion battery.

Abstract: A compound having the formula (I): is disclosed. A method of preparing the compound of formula (I) is also disclosed.

Abstract: The present disclosure provides a wound-type cell which includes: a first electrode plate; a second electrode plate; a separator disposed between the first electrode plate and the second electrode plate; a first electrode tab electrically connected to the first electrode plate; and a second electrode tab electrically connected to the second electrode plate; in which a third winding start end of the separator is positioned at an outer side of a second winding start end of the second electrode plate in a length direction; the third winding start end extends along a direction away from a second end of the second winding start end and the third winding start end is not folded back.

Abstract: The embodiments of the present application provides a wound electrode assembly formed by winding a first electrode sheet, a second electrode sheet, and an isolating membrane disposed therebetween. The wound electrode assembly includes: a first surface having a first protrusion in the thickness direction of the wound electrode assembly; a first wound electrode assembly; a second wound electrode assembly wrapping the first wound electrode assembly, the first wound electrode assembly and the second wound electrode assembly sharing the first electrode sheet and the second electrode sheet; an adhesive layer disposed between the first electrode sheet and the isolating membrane, and/or between the second electrode sheet and the isolating membrane. The purpose of the present application is at least to provide a wound electrode assembly capable of reducing the risk of misalignment of the internal structures of the electrode assembly during the falling, and retaining the shape of the electrode assembly.

Abstract: Embodiments of the present application disclose a battery to reduce the volume of the battery, improve the energy density of the battery, and further improve the bottom molding effect of the battery, as well as the safety performance and service life of the battery. The battery comprises an electrode assembly and a package film for packaging the electrode assembly, the package film including a folding portion, the folding portion including a first segment attached to the end face of the electrode assembly and a second segment connected to the first segment. The first segment is arranged between the second segment and the electrode assembly, and the second segment includes a multilayer package films.

Abstract: Provided is a wound cell, formed by winding of a first and second separator, a first and second electrode plate from start ends thereof, outermost circle of second electrode plate includes second single-side coated area, surface of which facing center of the wound cell is second blank current collector area not coated with second active material, portion of first electrode plate opposite to second blank current collector area includes first single-side coated area, surface of which away from the center of the wound cell is first blank current collector area not coated with first active material; tail end of first electrode plate contains first blank foil area, portion of second electrode plate opposite to first blank foil area contains second blank foil area; start ends of first and second single-side coated area are located at two opposite sides in thickness direction of the cell.

Abstract: The present application relates to an electrolyte and an electrochemical device comprising the electrolyte. The electrolyte comprises a dinitrile compound, a trinitrile compound, and propyl propionate, wherein, based on the total weight of the electrolyte, the content X of the nitrile compound and the content Y of the trinitrile compound meet the conditions represented by Formula (1) and Formula (2): {about 2 wt %?(X+Y)?about 11 wt % . . . (1), about 0.1?(X/Y)?about 8 . . . (2)}. The electrolyte of the present application is capable of effectively inhibiting the increase in DC internal resistance of an electrochemical device so that the electrochemical device has excellent cycle and storage performance.

Abstract: A battery comprises a first electrode assembly including a first electrode, and a second electrode assembly disposed adjacent the first electrode assembly along a first direction. The first electrode comprises a first segment that is disposed on an outer portion of the second electrode assembly. The first electrode may further comprise a second segment electrically connected to the first segment. The second segment is disposed on an outer portion of the first electrode assembly.

Abstract: A battery for powering a wearable device comprises a first cell, a second cell interconnected with the first cell, and a connection electrically coupled between the first cell and the second cell. The connection extends from the first cell to the second cell along a first direction. A length of the connection along the first direction is greater than a distance between the first cell and the second cell. In some embodiments, the connection comprises a folded structure configured to accommodate a dimensional change of the battery when bending the wearable device.

Abstract: Provided is a wound cell, formed by successively stacking and winding of first separator, first electrode plate, second separator and second electrode plate from head ends thereof, the first separator is located at innermost side of the flat-shaped cell; a first and second electrode tab is electrically connected with the first and second electrode plate, respectively; the first and second electrode tabs are located on a flat plane of the flat-shaped cell along a length direction thereof and do not overlap each other in a thickness direction thereof; a distance from the first or second electrode tab to a tail end of the first or second current collector is no larger than ? of total length of the first or second current collector, a sum of number of layers of the first separator and the second separator at the innermost side of the cell is no more than two.