Thermal Recovery of the Electrochemically Degraded LiCoO2/Li7La3Zr2O12:Al,Ta Interface in an All-Solid-State Lithium Battery

Martin Ihrig, Liang Yin Kuo, Sandra Lobe, Alexander M. Laptev, Che An Lin, Chia Hao Tu, Ruijie Ye, Payam Kaghazchi, Luca Cressa, Santhana Eswara, Shih Kang Lin, Olivier Guillon, Dina Fattakhova-Rohlfing, Martin Finsterbusch

Research output: Contribution to journalArticlepeer-review

9 Citations (Scopus)

Abstract

All-solid-state lithium batteries are promising candidates for next-generation energy storage systems. Their performance critically depends on the capacity and cycling stability of the cathodic layer. Cells with a garnet Li7La3Zr2O12 (LLZO) electrolyte can show high areal storage capacity. However, they commonly suffer from performance degradation during cycling. For fully inorganic cells based on LiCoO2 (LCO) as cathode active material and LLZO, the electrochemically induced interface amorphization has been identified as an origin of the performance degradation. This study shows that the amorphized interface can be recrystallized by thermal recovery (annealing) with nearly full restoration of the cell performance. The structural and chemical changes at the LCO/LLZO heterointerface associated with degradation and recovery were analyzed in detail and justified by thermodynamic modeling. Based on this comprehensive understanding, this work demonstrates a facile way to recover more than 80% of the initial storage capacity through a thermal recovery (annealing) step. The thermal recovery can be potentially used for cost-efficient recycling of ceramic all-solid-state batteries.

Original languageEnglish
Pages (from-to)4101-4112
Number of pages12
JournalACS Applied Materials and Interfaces
Volume15
Issue number3
DOIs
Publication statusPublished - 2023 Jan 25

All Science Journal Classification (ASJC) codes

  • General Materials Science

Fingerprint

Dive into the research topics of 'Thermal Recovery of the Electrochemically Degraded LiCoO2/Li7La3Zr2O12:Al,Ta Interface in an All-Solid-State Lithium Battery'. Together they form a unique fingerprint.

Cite this