2020/08/06 by Joshua V. Pondick, Sajad Yazdani, Milad Yarali +4
Chemistry · Engineering · Materials Science · Physics and Astronomy · #Advancements in Battery Materials #Battery (electricity) #Chemical engineering #Chemistry #Composite material #Electrochemistry #Electrode #Graphene #Graphene research and applications #Graphite #Inorganic chemistry #Intercalation (chemistry) #Lithium (medication) #Lithium-ion battery #Materials science #Nanotechnology #Nucleation #Organic chemistry #Physical chemistry #Raman spectroscopy #Supercapacitor Materials and Fabrication #Thermodynamics #cond-mat.mes-hall #cond-mat.mtrl-sci
paper · pdf · doi:10.1002/aelm.202000981
published as Advanced Electronic Materials 2021 · 4 figures
arxiv created 2020/08/06 · openalex publication_date 2021/01/19 · arxiv updated 2022/01/06 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Abstract The development of next‐generation electrodes for metal‐ion batteries requires an understanding of intercalation dynamics in nanomaterials. Herein, it is shown that microscale mechanical strain significantly affects the formation of ordered lithium phases in graphene. In situ Raman spectroscopy of graphene microflakes mechanically constrained at the edge during lithium intercalation reveals a thickness‐dependent increase of up to 1.26 V in the electrochemical potential that induces lithium staging. While the induced mechanical strain energy increases with graphene thickness to the fourth power, its magnitude is small compared to the observed increase in electrochemical energy. It is hypothesized that the mechanical strain energy increases a nucleation barrier for lithium staging, greatly delaying the formation of ordered lithium phases. These results indicate that electrode assembly may critically impact lithium staging dynamics. The present work demonstrates strain engineering in two dimensional (2D) nanomaterials as an effective approach to manipulate phase transitions and chemical reactivity.