Supercapacitors deliver a higher power density than batteries, but the latter stores more capacity.1 Combining the attributes of supercapacitors and batteries are needed for future electronics. One approach is to synthesize pseudocapacitive storage materials with both characteristics. Pseudocapacitive or hybrid materials offer opportunities to tackle much needed improvements in the performance of energy storage devices. Using a low-pressure chemical vapor deposition (CVD) process, nanostructured Ni-based electrodes pure NiO were directly deposited on stainless steel current collectors. Powder X-ray diffraction revealed the deposited materials have (111) preferred growth for NiO and (102) preferred growth for NiO samples. FESEM revealed differences in morphology for the materials, but all deposited materials were nanosized in scale. The relationships of the electrochemical properties and morphology were also investigated in order to design Ni-based oxide electrodes that exhibit overall superior electrochemical properties including pseudocapacitor. Galvanostatic charge-discharge and cyclic voltammetry experiments were performed in these two materials in the range of 0.1 – 4.0 V versus Li/Li<sup>+</sup> in 1:1 molar ratio of EC/DMC. The electrochemical performance of the NiO, which behave as a pseudocapacitor, will be discussed.<br/>

Pseudocapacitive study of NiO nanomaterials for electrochemical energy storage

255th National Meeting (2018)

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