Interlayer expansion of hydrogen titanate anodes improves electrochemical Na+ intercalation kinetics and reversibility

09 December 2024, Version 1
This content is a preprint and has not undergone peer review at the time of posting.

Abstract

Hydrogen tetratitanates (H2Ti4O9, HTO) are synthesized and studied as anode materials for sodium-ion batteries. Using n-propylamine molecular pillars, the interlayer spacing of HTO is increased from 0.86 to 1.58 nm. The electrochemical Na+ intercalation properties of pristine and interlayer-expanded HTOs are studied with detailed electrochemical characterization and operando electrochemical dilatometry experiments. Interlayer-expansion results in higher maximum sodiation capacity and improved kinetics and electrochemical reversibility.

Keywords

sodium-ion battery
anode materials
hydrogen titanate
nanoconfinement
interlayer expansion

Supplementary materials

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