Probing Electronic Structures With Ultraviolet Photoelectron Spectroscopy (UPS) for Advanced Lithium-Based Battery Systems

May 27, 2026

The pursuit of higher energy density and safety drives the development of next-generation lithium-based batteries, including Li metal, Li-S, and all-solid-state systems. These technologies face challenges arising from complex electronic structure and interfacial charge transfer that can be effectively studied using ultraviolet photoelectron spectroscopy (UPS). As a surface-sensitive method, UPS measures key electronic parameters such as work function, ionization energy, and valence band structure. The review synthesizes UPS applications to interpret intrinsic electronic structures, ion storage, interfacial reactions, and material or artificial interphase design, while summarizing major limitations and future needs for unified protocols, theory integration, and operando UPS.

LanguageEnglish

CategoryResearch & Report

FormatPDF

Pages27

Reading Time1 h 8 min

Introduction

Electronic-structure challenges in lithium-based batteries

UPS fundamentals and measured electronic parameters

Work function, ionization energy, valence band structure, and Fermi-level alignment

UPS applications across battery mechanisms

Intrinsic electronic structure and ion storage

Interfacial reactions and interphase evolution

Material modification and artificial interphases

Challenges and future perspectives

Reliable spectral acquisition and data interpretation

Gap between model systems and real operating conditions

Unified protocols, theory integration, and operando UPS

FAQs

Why is UPS important for next-generation lithium-based batteries?

UPS helps bridge the gap between macroscopic electrochemical behavior and electronic-level understanding by providing surface-sensitive access to electronic structures and interfacial charge transfer parameters.

Which electronic parameters does UPS measure in battery research?

UPS enables quantitative determination of work function, ionization energy, valence band structure, and Fermi-level alignment, which influence charge transfer kinetics and interfacial stability.

What are the key challenges of using UPS for battery studies?

The review highlights challenges in obtaining reliable spectra, accurately interpreting data, and reconciling results from idealized ultrahigh-vacuum model systems with real battery operating conditions.

May 27, 2026

Upload by Olivia Brown