Study of electrochemical performance of amorphous carbon-coated graphite for Li-ion battery

Rohman, Fadli; Azizah, Umi Muflihatun Nurul; Prihandoko, Bambang

doi:10.1063/1.4978113

Cited by 3 publications

(1 citation statement)

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“…Strategies to improving the passivating property of SEI to protect graphite electrode from further reactions with electrolyte in subsequent cycles have long been pursued, such as coating the graphite with amorphous/disordered carbon. [ 44–47 ] Being more electrochemically active than the conventional graphite, [ 48 ] graphite surface with defects is expected to induce the SEI formation at a more positive potential and form a more effective SEI. Nevertheless, there has not been a systematic and fundamental study to understand how defects/disorder in carbon materials could affect SEI formation and evolution on the electrode surface during lithiation and delithiation processes.…”

Section: Introductionmentioning

confidence: 99%

A Comparison of Solid Electrolyte Interphase Formation and Evolution on Highly Oriented Pyrolytic and Disordered Graphite Negative Electrodes in Lithium‐Ion Batteries

Zhu

Russell

Fang

et al. 2021

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The presence and stability of solid electrolyte interphase (SEI) on graphitic electrodes is vital to the performance of lithium‐ion batteries (LIBs). However, the formation and evolution of SEI remain the least understood area in LIBs due to its dynamic nature, complexity in chemical composition, heterogeneity in morphology, as well as lack of reliable in situ/operando techniques for accurate characterization. In addition, chemical composition and morphology of SEI are not only affected by the choice of electrolyte, but also by the nature of the electrode surface. While introduction of defects into graphitic electrodes has promoted their electrochemical properties, how such structural defects influence SEI formation and evolution remains an open question. Here, utilizing nondestructive operando electrochemical atomic force microscopy (EChem‐AFM) the dynamic SEI formation and evolution on a pair of representative graphitic materials with and without defects, namely, highly oriented pyrolytic and disordered graphite electrodes, are systematically monitored and compared. Complementary to the characterization of SEI topographical and mechanical changes during electrochemical cycling by EChem‐AFM, chemical analysis and theoretical calculations are conducted to provide mechanistic insights underlying SEI formation and evolution. The results provide guidance to engineer functional SEIs through design of carbon materials with defects for LIBs and beyond.

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Section: Introductionmentioning

confidence: 99%