Characteristic study of exfoliated graphene particles from waste batteries

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Abstract

Waste batteries (AA and AAA models) pose a major concern in waste disposal, and the graphite electrodes in them are also sources for graphene production. Here, solution-based exfoliation is followed to exfoliate graphene using various electrolytes where we observe sulfate-based electrolytes to be more efficient. Solution-based graphene, on Raman spectroscopic analysis, confirms a monolayer, highly conductive graphene (G1) of size ~ 24 nm with fewer defects and low oxidation levels. This graphene (G1) is converted to powder form and characterized using UV spectroscopy, FTIR, XRD, FESEM-EDS. Among the as-prepared graphene powders, a multi-layered, amorphous graphene powder (GP2) having a d-spacing of 3.7 Å with 80% carbon was the pre-eminent sample reported. GP2 with large graphene films finds its applications in a variety of fields.

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Karunanithi, B., Kumar, K. S., Balakrishnan, K., Muralidharan, S., Suresh, S., Viswanathan, V., & Angamuthu, M. (2021). Characteristic study of exfoliated graphene particles from waste batteries. Brazilian Journal of Chemical Engineering, 38(4), 915–927. https://doi.org/10.1007/s43153-021-00138-x

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