% IMPORTANT: The following is UTF-8 encoded.  This means that in the presence
% of non-ASCII characters, it will not work with BibTeX 0.99 or older.
% Instead, you should use an up-to-date BibTeX implementation like “bibtex8” or
% “biber”.

@INPROCEEDINGS{Tsai:189990,
      author       = {Tsai, Chih-Long and Dellen, Christian and Reppert, Thorsten
                      and Uhlenbruck, Sven and Buchkremer, Hans Peter and Guillon,
                      Olivier},
      title        = {{A}ll solid state {L}i battery using garnet structure
                      {T}a-substituted {L}i7{L}a3{Z}r2{O}12 as solid electrolyte},
      reportid     = {FZJ-2015-02953},
      year         = {2015},
      abstract     = {All solid state Li battery containing oxide-class solid
                      electrolyte is considered to be out stand from their high
                      safety and higher energy density. Compared to the other
                      class the solid Li ionic conductors, oxide-class Li ion
                      conductors have additional advantages of easier material
                      handling during synthesis, higher chemical stability and
                      wider electrochemical window[1-4].In order to realize the
                      using of oxide-class Li ion conductor as solid electrolyte
                      for a Li battery, Ta-substituted Li7La3Zr2O12 (LLZ:Ta)
                      powder had been synthesized via solid state reaction. LLZ:Ta
                      with an optimized sintering parameter exhibits a high Li ion
                      conductivity of 7.8 x 10-4 S cm-1 at 30 oC with a relative
                      density of $~94\%.$ By hot pressing, the relative density of
                      LLZ:Ta was increased to > $99\%$ with an Li ion conductivity
                      of 1.18 x10-3 S cm-1. The material was further implanted as
                      a solid electrolyte by using screen printing to put on
                      LiCoO2 as cathode. Afterward, a metallic Li foil was used as
                      anode by mechanical press onto the pellet. The built Li
                      battery with LLZ:Ta exhibited good charge-discharge
                      utilization of active material up to $80\%$ which equal to a
                      capacity density of ~580 Ah cm-2 at 100 oC. It also
                      exhibited good cycle ability that hundreds of cycle were
                      achieved at temperature of 45 oC. Thus, LLZ:Ta shows as a
                      promising candidate for all solid state Li battery. However,
                      the reduction of high internal resistance of the cell is
                      still maintained as the major challenge to further
                      improvement of the battery performance, especially if the
                      application of this all solid state Li battery is toward
                      room temperature. During this presentation, the material
                      properties of LLZ:Ta, the test results which include
                      microstructure and electrochemical performances from Li
                      battery by using LLZ:Ta and the challenges of building up Li
                      battery by using LLZ:Ta will be discussed.},
      month         = {Apr},
      date          = {2015-04-27},
      organization  = {Batterietag/Kraftwerk Batterie 2015,
                       Aachen (Germany), 27 Apr 2015 - 29 Apr
                       2015},
      subtyp        = {After Call},
      cin          = {IEK-1},
      cid          = {I:(DE-Juel1)IEK-1-20101013},
      pnm          = {131 - Electrochemical Storage (POF3-131) / HITEC -
                      Helmholtz Interdisciplinary Doctoral Training in Energy and
                      Climate Research (HITEC) (HITEC-20170406)},
      pid          = {G:(DE-HGF)POF3-131 / G:(DE-Juel1)HITEC-20170406},
      typ          = {PUB:(DE-HGF)6},
      url          = {https://juser.fz-juelich.de/record/189990},
}