Fueling from the Electrochemistry of Halide Solid Electrolytes

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


Unveiling the electrochemistry of solid-state Li2ZrCl6 halide electrolyte, we reveal its dual function as both an ion conductor and a supplementary electron source/sink. This groundbreaking discovery leads to a remarkable long-term enhancement of the specific capacity of industry-relevant heavily loaded LiFePO4 electrodes by several tens of percent, while significantly amplifying that of Si-based or anode-less full cells through effective compensation for side reactions. We show that these effects can potentially be tuned by adjusting the initial xLiCl-ZrCl4 composition of the solid electrolyte (SE), which may thus become a new and mighty parameter for balancing the two electrodes.


Redox electrolyte
Halide solid electrolyte
All-Solid-State batteries
high loading industrial relevant electrodes
healing side reactions
High voltage
sacrificial capacity
reversible to irreversible capacity ratio

Supplementary materials

Fueling from the Electrochemistry of Halide Solid Electrolytes
Methods and experimental details as well complementary results and Figures


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Comment number 1, Joel GAUBICHER: May 17, 2024, 09:14

This paper is now available online: https://iopscience-iop-org.inc.bib.cnrs.fr/article/10.1149/1945-7111/ad4c99