Abstract: A battery module includes a plurality of cell assemblies including a plurality of secondary batteries; a module housing including an accommodation space configured to accommodate the plurality of cell assemblies; and a blocking member configured to, when a gas pressure more than a predetermined gas pressure or a heat more than a predetermined temperature is generated in at least some cell assemblies among the plurality of cell assemblies, block the generated gas or heat from moving to the other cell assemblies.

Abstract: An anode active material for a secondary battery includes a carbon-based active material, and silicon-based active material particles doped with magnesium. At least some of the silicon-based active material particles include pores, and a volume ratio of pores having a diameter of 50 nm or less among the pores is 2% or less based on a total volume of the silicon-based active material particles.

Abstract: The technology and implementations disclosed in this patent document generally relate to a lithium secondary battery including: a first unit cell including a first anode including a 1-1 anode mixture layer and a 1-2 anode mixture layer on the 1-1 anode mixture layer, and a second unit cell including a second anode including a 2-1 anode mixture layer and a 2-2 anode mixture layer on the 2-1 anode mixture layer, wherein a weight ratio of the silicon-based active material in the 1-2 anode mixture layer is greater than a weight ratio of the silicon-based active material in the 1-1 anode mixture layer, and a weight ratio of the silicon-based active material in the 2-2 anode mixture layer is less than or equal to a weight ratio of the silicon-based active material in the 2-1 anode mixture layer.

Abstract: In some implementations, the anode includes a current collector, a first anode mixture layer formed on at least one surface of the current collector, and a second anode mixture layer formed on the first anode mixture layer. The first anode mixture layer and the second anode mixture layer include a carbon-based active material, respectively. The first anode mixture layer includes a first binder, a first silicon-based active material, and a first conductive material. The second anode mixture layer includes a second binder, a second silicon-based active material, and a second conductive material. Contents of the first conductive material and the second conductive material are different from each other with respect to the total combined weight of the first anode mixture layer and the second anode mixture layer. Types of the first silicon-based active material and the second silicon-based active material are different from each other.

Abstract: An anode for a lithium secondary battery includes an anode current collector, and an anode active material layer formed on at least one surface of the anode current collector. The anode active material layer includes a carbon-based active material, a first silicon-based active material doped with magnesium and a second silicon-based active material not doped with magnesium. A content of the first silicon-based active material is in a range from 2 wt % to 20 wt % based on a total weight of the anode active material layer.

Abstract: Disclosed is a modified polyisobutylene polymer for rubber compounding. The modified polyisobutylene polymer is prepared by reacting reactants including a polyisobutylene in which the main chain is isobutylene, an unsaturated dicarboxylic anhydride, and an amino group-containing silane compound. The modified polyisobutylene polymer includes a diamide structure. When the modified polyisobutylene polymer is used as an additive for rubber compounding, the processability of the rubber is increased, the dispersibility of fillers is significantly improved, and the effect of obtaining excellent grip performance and improved rolling resistance can be achieved.

Abstract: Disclosed is a modified polyisobutylene polymer for rubber compounding. The modified polyisobutylene polymer is prepared by reacting reactants including a polyisobutylene in which the main chain is isobutylene, an unsaturated dicarboxylic anhydride, and an amino group-containing silane compound. The modified polyisobutylene polymer includes a diamide structure. When the modified polyisobutylene polymer is used as an additive for rubber compounding, the processability of the rubber is increased, the dispersibility of fillers is significantly improved, and the effect of obtaining excellent grip performance and improved rolling resistance can be achieved.