On-demand hydrogen generation from the hydrolysis reactions of chemical hydrides has gained ever-increasing attention as a promising approach for providing mobile/portable hydrogen sources. In this paper, we report a new chemical hydrogen storage system that is composed of sodium borohydride (NaBH 4 )/aluminum (Al)/sodium hydroxide (NaOH) solid powder mixture and aqueous solution of cobalt chloride (CoCl 2 ). Hydrogen generation can be readily controlled by regulating the contact of the aqueous solution with the solid powder mixture. In comparison with the conventional NaBH 4 /H 2 O or Al/H 2 O systems, the newly developed dual-solid-fuel system exhibits distinct advantages in hydrogen storage density, hydrogen generation rate and fuel conversion. Additionally, the dual-solid-fuel system shows satisfactory transient response. The factors influencing the hydrogen generation performance of the system were studied. The reaction by-products were characterized using powder X-ray diffraction and Fourier transform infrared spectroscopy techniques. Our study demonstrated a high-performance dual-solid-fuel hydrogen generation system, and may lay a foundation for developing practical hydrogen generators for mobile/portable applications.