The development of new SiOC based-materials doped with Nitrogen heteroatoms is highly valued due to the potential cost-effective applications in energy storage devices. In this work, a new triazine and piperazine-based dendrimers are designed with tunable carbon and nitrogen content, evaluating its influence on the incorporation into the polymeric precursor. We show that the hydrosilylation reactions generates by controlling the heat treated to produce the new ceramic materials. The chemical etched with HF of Si(N)OCs-based ceramic materials remove partially silica units, producing a controlled increase in porosity which results an increases the surface area. Specifically, the obtained Si(N)OC materials are fundamentally formed by SiC4, SiOC3 and SiO2C2 units that coexist with a segregated carbon phase and carbon aromatic rings with N heteroatoms. Our results prove that controlling the pyrolysis treatment is a feasible way to achieve a less defective carbon as well as the formation of more SiC4 units when materials are heat treated at higher temperatures. Finally, cyclic voltammetry experiments and galvanostatic charge-discharge data were used to correlate the surface functional groups and the amount of N incorporated with the electrochemical characteristics of the obtained materials with an aim of developing high-performance carbon electrodes for electrolytic double layer capacitors.