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@ARTICLE{Schneider:1025217,
      author       = {Schneider, Kirstin and Kiyek, Vivien and Finsterbusch,
                      Martin and Yagmurlu, Bengi and Goldmann, Daniel},
      title        = {{A}cid {L}eaching of {A}l- and {T}a-{S}ubstituted
                      {L}i7{L}a3{Z}r2{O}12 ({LLZO}) {S}olid {E}lectrolyte},
      journal      = {Metals},
      volume       = {13},
      number       = {5},
      issn         = {2075-4701},
      address      = {Basel},
      publisher    = {MDPI},
      reportid     = {FZJ-2024-02785},
      pages        = {834 -},
      year         = {2023},
      abstract     = {Solid-state batteries (SSBs) are promising next-generation
                      batteries due to their potential for achieving high energy
                      densities and improved safety compared to conventional
                      lithium-ion batteries (LIBs) with a flammable liquid
                      electrolyte. Despite their huge market potential, very few
                      studies have investigated SSB recycling processes to recover
                      and reuse critical raw metals for a circular economy. For
                      conventional LIBs, hydrometallurgical recycling has been
                      proven to be able to produce high-quality products, with
                      leaching being the first unit operation. Therefore, it is
                      essential to establish a fundamental understanding of the
                      leaching behavior of solid electrolytes as the key component
                      of SSBs with different lixiviants. This work investigates
                      the leaching of the most promising Al- and Ta-substituted
                      Li7La3Zr2O12 (LLZO) solid electrolytes in mineral acids
                      (H2SO4 and HCl), organic acids (formic, acetic, oxalic, and
                      citric acid), and water. The leaching experiments were
                      conducted using actual LLZO production waste in 1 M of acid
                      at 1:20 S/L ratio at 25 °C for 24 h. The results showed
                      that strong acids, such as H2SO4, almost completely
                      dissolved LLZO. Encouraging selective leaching properties
                      were observed with oxalic acid and water. This fundamental
                      knowledge of LLZO leaching behavior will provide the basis
                      for future optimization studies to develop innovative
                      hydrometallurgical SSB recycling processes.},
      cin          = {IEK-1},
      ddc          = {530},
      cid          = {I:(DE-Juel1)IEK-1-20101013},
      pnm          = {1221 - Fundamentals and Materials (POF4-122)},
      pid          = {G:(DE-HGF)POF4-1221},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000996826900001},
      doi          = {10.3390/met13050834},
      url          = {https://juser.fz-juelich.de/record/1025217},
}