Deciphering the Role of Fluorination in Dual-Halogen Electrolytes for All-Solid-State Batteries: A Case Study of New Li₂HfCl_6-xF_x Solid Electrolytes.

ABSTRACT: Lithium metal chlorides are promising superionic conductors for all-solid-state batteries (SSBs) due to their favorable mechanical properties, high ionic conductivity, and good oxidative stability (up to >4.2 V versus Li/Li⁺). Nonetheless, chloride solid electrolytes (SEs) still undergo electrochemical degradation when paired with high-voltage cathodes such as LiNi_0.85Co_0.1Mn_0.05O₂. A viable strategy to enhance the intrinsic electrochemical stability of chloride electrolytes is to partially substitute Cl with F. By leveraging complementary insights from neutron and X-ray diffraction, X-ray absorption spectroscopy, X-ray photoelectron spectroscopy (XPS), time-of-flight secondary ion mass spectrometry (ToF-SIMS), and electrochemical stud

SUBMITTER: Qian L 

PROVIDER: S-EPMC12501681 | biostudies-literature | 2025 Oct

REPOSITORIES: biostudies-literature