Multi-dimensional, Multi-scale Analysis of Interphase Chemistry for Enhanced Fast-Charging of Lithium-Ion Batteries with Ion Mass Spectrometry

Journal of the American Chemical Society, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 6, 2025

Understanding the fundamental properties of electrode–electrolyte interphases (EEIs) is essential for designing electrolytes that support stable operation under high charging rates. In this study, we benchmark our fast-charging electrolyte (FCE) against commercial LP57 to identify EEI characteristics enhance performance. By utilizing latest advances in time-of-flight secondary ion mass spectrometry (TOF-SIMS) and focused-ion beam (FIB) techniques, reveal complex chemical architecture cathode–electrolyte interphase (CEI). Our findings indicate battery conditions requires reduced surface reactivity rather than stabilizing bulk integrity cathode. While inorganic species are often cited as beneficial composition, their distribution within equally critical. Additionally, dynamic interactions between cathode material conductive carbon significantly affect CEI formation alter passivation layer chemistry. A chemically homogeneous components passivating preferentially active particles desired enhanced Notably, amount decomposition solid-electrolyte (SEI) far outweighs SEI determining better electrochemical An inorganic-rich effectively protects graphite particles, suppresses accumulation metallic lithium, prevents lithium dendrites. Overall, an performance can be achieved by tuning chemistry on both anode sides.

Language: Английский

Design and performance analysis of high surface area carbon and LiNi0.8Mn0.1Co0.1O2 composite as cathode for Lithium-ion battery capacitors

Electrochimica Acta, Journal Year: 2025, Volume and Issue: unknown, P. 145703 - 145703

Published: Jan. 1, 2025

Language: Английский