The preparation and properties performance of lithium carbonate @ manganese dioxide @ white carbon black electrode materials

In this paper, novel composite materials based on white carbon black were synthesized and used to prepare high-performance electrode materials. First, white carbon black was activated by sodium hydroxide (NaOH) to remove the impurities, and the specific surface area of activated white carbon black could be increased to load other conductive materials. Second, the activated white carbon black was respectively mixed with lithium carbonate (Li2CO3) and manganese dioxide (MnO2) with different mass ratios. Subsequently, those composite materials were heated to a paste, which were coated on a foam nickel sheet to obtain nickel electrode. Finally, laser particle size, X-ray diffraction (XRD), scanning electron microscope (SEM), and the electrochemical techniques were applied to characterize those white carbon black composites. On the one hand, when the ratio of white carbon black to Li2CO3 was 1:1, almost no impedance was observed, and the electrochemical performance was the best. On the other hand, the electrochemical performance was the best when the ratio of white carbon black to MnO2 was 1:2. White carbon black-based materials with high specific surface area could be prepared via one step by activation of white carbon black by NaOH. This method was simple to operate and showed the advantage of low cost as well as industrial application potential.