Abstract: The present disclosure provides a lithium manganate positive electrode active material, comprising a lithium manganate matrix and a cladding layer, where the cladding layer comprises an organic bonding material, one or more A-type salts, and one or more B-type salts. The lithium manganate positive electrode active material of the present disclosure significantly reduces the content of transition metal manganese ions within a battery through combined action of the organic bonding material, the A-type salts, and the B-type salts, thereby slowing down the decomposition and consumption of the SEI film (solid electrolyte interphase) by transition metal manganese, and improving the capacity retention rate and impedance performance of the battery.

Abstract: A lithium manganate positive electrode active material, comprising a lithium manganate matrix and a cladding layer as a “barrier layer” and a “functional layer” are described. The cladding layer can not only “prevent” the transition metal ions which have been produced by the lithium manganate matrix from directly “running” into the electrolyte solution, but also “prevent” the hydrofluoric acid in the electrolyte solution from directly contacting with the lithium manganate substrate, and then prevent the lithium manganate matrix from dissolving out more transition metal manganese ions; as a “functional layer”, the cladding layer contains various effective ingredients inside, which can reduce the transition metal manganese ions already present inside the battery through chemical reactions or adsorption effects, thus slowing down the generation of transition metal manganese and the decomposition of the SEI film (solid electrolyte interphase film) catalyzed by the transition metal manganese.

Abstract: A method and device for generating a list of video files, which are applied to a mobile terminal. The method comprises: when video files are imported in a mobile terminal, invoking a system interface program of the mobile terminal to scan the imported video files; if scanning is successful, obtaining attribute information about the video files through the system interface program, and storing same in a system database of the mobile terminal; if scanning is not successful, invoking a custom interface program, obtaining the attribute information about the video files, and storing same in a custom database; when it is required to generate a list of video files, obtaining the stored attribute information about the various video files from the system database and the custom database respectively; based on the attribute information about the various video files obtained from the system database and the custom database, generating the list of video files.

Abstract: A method and device for generating a list of video files, which are applied to a mobile terminal. The method comprises: when video files are imported in a mobile terminal, invoking a system interface program of the mobile terminal to scan the imported video files; if scanning is successful, obtaining attribute information about the video files through the system interface program, and storing same in a system database of the mobile terminal; if scanning is not successful, invoking a custom interface program, obtaining the attribute information about the video files, and storing same in a custom database; when it is required to generate a list of video files, obtaining the stored attribute information about the various video files from the system database and the custom database respectively; based on the attribute information about the various video files obtained from the system database and the custom database, generating the list of video files.