Clarifying the electro-chemo-mechanical coupling in Li10SnP2S12 based all-solid-state batteries

DOI: 10.1002/aenm.202103714

Authors: Fu Sun (Qingdao Institute of Bioenergy and Bioprocess Technology Chinese Academy of Sciences) , Chao Wang (Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences) , Markus Osenberg (Helmholtz-Zentrum Berlin für Materialien und Energie) , Kang Dong (Helmholtz-Zentrum Berlin für Materialien und Energie) , Shu Zhang (Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences) , Chao Yang (Helmholtz-Zentrum Berlin für Materialien und Energie) , Yantao Wang (Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences; University of Chinese Academy of Sciences) , Andre Hilger (Helmholtz-Zentrum Berlin für Materialien und Energie) , Jianjun Zhang (Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences) , Shanmu Dong (Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences) , Henning Markötter (Bundesanstalt für Materialforschung und -Prüfung) , Ingo Manke (Helmholtz-Zentrum Berlin für Materialien und Energie) , Guanglei Cui (Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences; University of Chinese Academy of Sciences)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Advanced Energy Materials

State: Published (Approved)
Published: February 2022
Diamond Proposal Number(s): 18936

Abstract: A fundamental clarification of the electro-chemo-mechanical coupling at the solid–solid electrode|electrolyte interface in all-solid-state batteries (ASSBs) is of crucial significance but has proven challenging. Herein, (synchrotron) X-ray tomography, electrochemical impedance spectroscopy (EIS), time-of-flight secondary-ion mass spectrometry (TOF-SIMS), and finite element analysis (FEA) modeling are jointly used to decouple the electro-chemo-mechanical coupling in Li10SnP2S12-based ASSBs. Non-destructive (synchrotron) X-ray tomography results visually disclose unexpected mechanical deformation of the solid electrolyte and electrode as well as an unanticipated evolving behavior of the (electro)chemically generated interphase. The EIS and TOF-SIMS probing results provide additional information that links the interphase/electrode properties to the overall battery performance. The modeling results complete the picture by providing the detailed distribution of the mechanical stress/strain and the potential/ionic flux within the electrolyte. Collectively, these results suggest that 1) the interfacial volume changes induced by the (electro)chemical reactions can trigger the mechanical deformation of the solid electrode and electrolyte; 2) the overall electrochemical process can accelerate the interfacial chemical reactions; 3) the reconfigured interfaces in turn influence the electric potential distribution as well as charge transportation within the SE. These fundamental discoveries that remain unreported until now significantly improve the understanding of the complicated electro-chemo-mechanical couplings in ASSBs.

Journal Keywords: all-solid-state batteries; lithium metal batteries; solid electrolytes; sulfide solid electrolytes; synchrotron X-ray tomography

Diamond Keywords: Batteries; Solid-State Batteries (SSB);

Subject Areas: Materials, Chemistry, Energy


Instruments: I13-2-Diamond Manchester Imaging

Added On: 14/02/2022 09:16

Discipline Tags:

Energy Storage Energy Physical Chemistry Energy Materials Chemistry Materials Science

Technical Tags:

Imaging Tomography