Carbon - silicon complex, a method of manufacturing the same and a negative electrode active material containing this
The present invention, carbon capacity and cycle stability is improved - relates silicon composite and a manufacturing method thereof, and more specifically, N, P, B, one or two kinds selected from the group consisting of Na and Al or doping atoms are carbon-based material which is doped by carbon coating on the surface of the silicon particles - silicon composite and a manufacturing method thereof related.
Abstract In this work we study conditions for guaranteeing the nonnegativity of a discrete-time singular control system. A first approach can be found in the literature for general systems, using the whole coefficient matrices. Also, the particular case of matrices of index 1 has been treated by using a block decomposition and the group-projector of the matrix that gives the singularity to the system. In order to complete this study, an analysis of the nonnegativity of a singular control system for matrices having arbitrary index is done by means of the core–nilpotent decomposition. This technique allows us to reduce the size of the original matrices, improving the results where the whole coefficients are involved.