Add time:07/31/2019         Source:sciencedirect.com

In the present study, lithium nickel manganese oxide powders grafted with camphoric nano-carbons have been exploited to fabricate high voltage, high capacity rechargeable electrodes for Li storage. The prepared lithium nickel manganese oxide particles were pyrolyzed using a camphoric solution to graft porous camphoric carbon layer on to the surface. A detailed study was performed to elucidate the effect of carbon content on the performance of the electrode. Relative contributions of capacitive and diffusion-controlled processes underlying these composite electrodes have been mathematically modeled. The lithium nickel manganese oxide composites showed two times higher conductivity as compared to the pristine samples. These electrodes exhibited a specific capacity value of ~154 mAhg-1 and showed good rate capability. The capacity fading was found to be ~17% at the end of 200 cycles for 100% depth of discharge. The specific capacity and capacity retention for these blends were found to be ~10% and ~40% higher respectively than pristine powders which are promising considering their low cost and facile fabrication process.

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