Abstract: A silicon-carbon composite material, a preparation method thereof, and a secondary battery are provided. The silicon-carbon composite material includes a silicon-carbon composite core and a carbon coating layer coated on the silicon-carbon composite core, and multiple closed pores are dispersed in the silicon-carbon composite core. The preparation method includes steps of (I) a surface modification treatment of a high-molecular polymer, (II) a preparation of a nano-silicon dispersion, (III) a preparation of a first precursor, (IV) a preparation of a second precursor, and (V) carbon coating. The closed pores in the silicon-carbon composite core can effectively alleviate the significant volume effect of silicon generated during lithium intercalation and deintercalation, and the combination of the silicon-carbon composite core and the carbon coating layer can ensure structural stability and high strength of the material.

Abstract: A method for identity verification, a consumable box and a storage medium are provided. The method includes a first key verification and a second key verification. The second key verification includes: receiving, by a consumable chip, a reading instruction for serial number reading; sending, by the consumable chip, a first serial number based on the reading instruction; sending, by the consumable chip, a first status code in response to a first verification code, wherein the first verification code is obtained based on the first serial number; receiving again, by the consumable chip, the reading instruction for serial number reading; and sending, by the consumable chip, a second serial number based on the reading instruction, and completing, the identity verification based on the second serial number.

Abstract: A method for identity verification, a consumable box and a storage medium are provided. The method includes a first key verification and a second key verification. The second key verification includes: receiving, by a consumable chip, a reading instruction for serial number reading; sending, by the consumable chip, a first serial number based on the reading instruction; sending, by the consumable chip, a first status code in response to a first verification code, wherein the first verification code is obtained based on the first serial number; receiving again, by the consumable chip, the reading instruction for serial number reading; and sending, by the consumable chip, a second serial number based on the reading instruction, and completing, the identity verification based on the second serial number.