The impact of high-frequency-high-current perturbations on film formation at the negative electrode-electrolyte interface

• DOI: 10.1016/j.electacta.2017.03.020
• Publication Date: 2017-03-07T19:17:52Z
• Authors: Kotub Uddin; Limhi Somerville; Anup Barai; Michael Lain; T.R. Ashwin; Paul Jennings; James Marco
• Keywords: TK; Electrochemistry; Chemical Engineering(all); 0202 electrical engineering, electronic engineering, information engineering; QD; 02 engineering and technology; 7. Clean energy; 3. Good health

Long term ageing experimental results show that degradation resulting from coupled DC and AC current waveforms lead to additional of lithium-ion batteries above experienced through pure cycling. More profoundly, such experiments a dependency battery on the frequency perturbation. This paper addresses underlying causality this dependent degradation. Cell autopsy techniques, namely X-ray photoelectron spectroscopy (XPS) negative electrode surface film, growth film components with superimposition an waveform. XPS high perturbations increased formation passivating film. In order determine cause formation, heterogeneous electrochemical model for LiNiCoAlO2/C6 lithium ion governing equations electrical double-layer solid electrolyte interface is developed. Simulation suggest attributed heat generation. due kinetics in double layer which are governed by Poisson-Boltzmann equation. Additional thermal reference cell relaxation undertaken further corroborates conclusion generation within function excitation resistive dissipation entropy reaction.