Abstract: The invention discloses a ternary positive electrode material coated with nitride/graphitized carbon nanosheets and preparation method thereof. The ternary positive electrode material coated with nitride/graphitized carbon nanosheets includes a ternary positive electrode material matrix and a coating layer; the coating layer is composed of nitride and graphitized carbon; and the graphitized carbon is formed in situ in the coating process of the nitride. Compared with a physical mixing method, the in-situ generated carbon layer is connected to the material matrix more tightly, and the formed conductive network is denser. So that the rate performance of the material is improved to the maximum extent. The preparation method is simple and easy to realize industrial production. And the obtained ternary positive electrode material coated with nitride/graphitized carbon nanosheets has excellent rate performance and cycling stability.

Abstract: A smart home access device, comprising a transmission modulation-demodulation module which demodulates a digital transmission signal downloaded via a cable into a video or audio digital signal and an Ethernet signal and for outputting respectively, or also modulates the Ethernet signal by the cable to upload; and in particular, also comprising an Ethernet remote control extension processor which receives and parses the Ethernet signal downloaded by the transmission modulation-demodulation module so as to extract a control signal therefrom, or receives the control signal and encode same into an Ethernet signal for uploading to the transmission modulation-demodulation module; further, also comprising an Ethernet exchange module which exchanges and transmits the downloaded Ethernet signal to at least two Ethernet interfaces, one of the Ethernet interfaces being the interface with the Ethernet remote control extension processor.