Boron Doped Graphene as a Negative Electrode Additive for High Performance Lead-Acid Batteries

Bhattacharjee, Udita and Martha, Surendra Kumar (2018) Boron Doped Graphene as a Negative Electrode Additive for High Performance Lead-Acid Batteries. Masters thesis, Indian Institute of Technology, Hyderabad.

Preview

Text
Thesis_Msc_CY_3948.pdf - Published Version
Download (3MB) | Preview

Abstract

Lead-acid battery remains the most successful battery system ever developed. Although lead-acid battery designs have been optimized in the past in several different ways, there are still certain new challenges faced by lead-acid battery designers, as additional failure modes become evident in various end-uses. In this work we have studied the effect of Boron doped graphene as an additive for the negative electrode in lead acid battery. B-doped graphene synthesized from the solvothermal method. Boron doping confirmed by the different characterization methods. X-ray photoelectron spectroscopy (XPS) measurement confirms the atomic level of boron (3.11 %) is doped into the boron doped graphene. Here we have systematically investigated the various percentages of the Boron doped graphene (0, 0.25, 0.5 and 1wt. %) additive added to the negative active material (NAM). Besides this study involves optimized the additive w.r.t negative active material and percentage of boron in boron doped graphene, it is found that 0.25 wt.% B-doped graphene additive in negative electrode which contains around 3% of Boron doping in the graphene shows optimum results. Boron doped graphene additive shows the impressive electrochemical performance in first discharge capacity, ~80% increases the capacity compared to the without born doped additive. An increase in capacity by 15-20% at lower C rates and the increase in capacity is almost double at higher C rates which indicates that this modified additive can be used for potential application in lead acid battery. Charge transfer dependent on the holes present the boron doped graphene and significant changes in the electronic structure of the graphene. Our results confirm the boron doping onto the graphene lattice it gives superior electrochemical performances and high rate partial charge cycling in lead acid batteries negative electrode additive.

[error in script]

IITH Creators: