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In order to improve the mechanical properties of HTPB four component and CL-20/CAP propellants and solve the problem of "dewetting" at the interface of the novel propellant filler matrix, a new Schiff base bonding agent was designed and synthesized. The bonding effect and mechanical properties of the propellant were characterized by Fourier infrared spectrosco-py, scanning electron microscopy and universal material tensioning machine. The results showed that the synthesized new Schiff base bonding agent contained the essential functional groups of the bonding agent and had obvious bonding on the AP surface. The new Schiff base bonding agent was expected to replace the toxic MAPO and significantly improve the mechanical properties of HTPB four component propellant, the strength of HTPB four component propellant reached 0. 7MPa, and the elongation was greater than 55% at room temperature. The elongation at high and low temperature are greater than 50% and 60% respectively. The processing performance of HTPB four component propellants can be significantly improved. In CL-20/CAP propellant, the new Schiff base bonding agent can improve the strength and elongation of the propellant at the same time. [ABSTRACT FROM AUTHOR]

Surface deterioration occurs more easily in nickel-rich cathode materials with the increase of nickel content. To simultaneously prevent deterioration of active cathode materials and improve the electrochemical performance of the nickel-rich cathode material, the surface of nickel-rich LiNi0.6Co0.2Mn0.2O2 cathode material is decorated with the stable structure and conductive Li3PO4 by a facile method. The LiNi0.6Co0.2Mn0.2O2-1wt%, 2wt%, 3wt%Li3PO4 samples deliver a high-capacity retention of more than 85% after 100 cycles at 1 C under a high voltage of 4.5 V. The effect of different coating amounts (0–5wt%) for the LiNi0.6Co0.2Mn0.2O2 cathode is analyzed in detail. Results show that 2wt% coating of Li3PO4 gives better performance compared to other coating concentrations. Detailed analysis of the structure of the samples during the charge-discharge process is performed by in-situ X-ray diffraction. It is indicated that the modification for LiNi0.6Co0.2Mn0.2O2 cathode could protect the well-layered structure under high voltages. In consequence, the electrochemical performance of modified samples is greatly improved. [ABSTRACT FROM AUTHOR]