Structural stability and electrochemical response of 3D printed and reactively sintered Ga-doped Li7La3Zr2O12 electrolytes

[Display omitted] •Ga-doped Li7La3Zr2O12 (LLZO) tubes manufactured by 3D printing/reactive sintering.•As-processed tubes showed a relative density of ∼88 % a cubic LLZO fraction > 90 %•The cubic LLZO was maintained after immersion in PbLi at 350 °C for up to 100 h.•Conductivity through LLZO obser...

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Veröffentlicht in:Materials letters 2024-11, Vol.375 (C), p.137240, Article 137240
Hauptverfasser: Dandeneau, Christopher S., Rajeev, Rahul, Gootgeld, Adam, Hitchcock, Dale A., Olson, Luke C., Zhou, Tianyi, Tong, Jianhua, Brinkman, Kyle S., Garcia-Diaz, Brenda L.
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Sprache:eng
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Zusammenfassung:[Display omitted] •Ga-doped Li7La3Zr2O12 (LLZO) tubes manufactured by 3D printing/reactive sintering.•As-processed tubes showed a relative density of ∼88 % a cubic LLZO fraction > 90 %•The cubic LLZO was maintained after immersion in PbLi at 350 °C for up to 100 h.•Conductivity through LLZO observed upon immersion in PbLi at 350 °C. Cubic Ga-doped Li7La3Zr2O12 (LLZO) tubes with one closed end were produced by a 3D printing-reactive sintering process. For the first time, the structural stability of Ga-doped LLZO tubes (relative density: ∼88 %, cubic LLZO fraction > 90 %) was evaluated after immersion in eutectic PbLi, a candidate molten breeder, at 350 and 450 °C. The high ionic conductivity cubic LLZO phase was maintained after immersion at 350 °C for 100 h, while secondary phase formation and conversion of cubic LLZO to the tetragonal polymorph was observed after 6 h at 450 °C. Li was successfully pumped through the tubes during linear voltage sweeps at 350 °C, indicating that Ga-doped LLZO is a possible candidate for hydrogen isotope extraction in PbLi via direct electrolysis.
ISSN:0167-577X
DOI:10.1016/j.matlet.2024.137240