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@INPROCEEDINGS{Tsai:279020,
      author       = {Tsai, Chih-Long and Dellen, Christian and Gehrke,
                      Hans-Gregor and Lobe, Sandra and Uhlenbruck, Sven and
                      Guillon, Olivier},
      title        = {{A}ll-{S}olid-{S}tate {L}i {B}attery {U}sing {G}arnet
                      {S}tructure {T}a-substituted {L}i7{L}a3{Z}r2{O}12 as {S}olid
                      {E}lectrolyte},
      reportid     = {FZJ-2015-07190},
      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. The use of LLZ as solid
                      electrolyte for solid-state battery had been reported in
                      several papers. However, the reported solid-state batteries
                      were all constructed with a thin film cathode which was made
                      either by physical vapor or sol-gel deposition[1-2]. The
                      thin film cathodes were usually under or around 1 m in
                      thickness which made the energy density of these batteries
                      not practical. 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 $~94\%.$ The material was further implanted as a
                      solid electrolyte by using screen printing to put on thick
                      LiCoO2 (> 50 m) as cathode. A proper sintering process
                      was invested for well bonding the thick cathode layer to the
                      supporting electrolyte. The constructed all-solid-state Li
                      batteries exhibited good charge-discharge utilization of
                      active material of more than $80\%$ which is equal to a
                      capacity density of ~0.9mAh cm-2 at 100 oC. It also
                      exhibited good cycle ability that one hundred of cycles were
                      achieved at temperature of 50 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 the major challenge for further improvement of the
                      battery performance, especially if the application of this
                      all solid state Li battery is toward room temperature.
                      During this presentation, results from material chemical
                      stability, cell morphology, electrochemical performance and
                      the challenges of building up Li battery by using LLZ:Ta
                      will be discussed.},
      month         = {Oct},
      date          = {2015-10-05},
      organization  = {66th Annual Meeting of the
                       International Society of
                       Electrochemistry, Taipei (Taiwan), 5
                       Oct 2015 - 9 Oct 2015},
      subtyp        = {After Call},
      cin          = {IEK-1 / JARA-ENERGY},
      cid          = {I:(DE-Juel1)IEK-1-20101013 / $I:(DE-82)080011_20140620$},
      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)24},
      url          = {https://juser.fz-juelich.de/record/279020},
}