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@ARTICLE{Xu:890763,
      author       = {Xu, Qi and Tsai, Chih-Long and Song, Dongsheng and Basak,
                      Shibabrata and Kungl, Hans and Tempel, Hermann and Hausen,
                      Florian and Yu, Shicheng and Eichel, Rüdiger-A.},
      title        = {{I}nsights into the reactive sintering and separated
                      specific grain/grain boundary conductivities of
                      {L}i1.3{A}l0.3{T}i1.7({PO}4)3},
      journal      = {Journal of power sources},
      volume       = {492},
      issn         = {0378-7753},
      address      = {New York, NY [u.a.]},
      publisher    = {Elsevier},
      reportid     = {FZJ-2021-01180},
      pages        = {229631 -},
      year         = {2021},
      abstract     = {Li1.3Al0.3Ti1.7(PO4)3 (LATP) is a promising candidate as
                      solid electrolyte and Li+ conductive component in the
                      composite electrodes of all-solid-state Li-ion batteries.
                      For both applications, reducing the sintering temperature of
                      LATP while preserving its electrochemical properties is
                      highly desired. This work is dedicated to reducing the
                      sintering temperature of LATP from conventionally around
                      1000 °C to a low temperature of 775 °C with adding an
                      extra 10 wt $\%$ of Li2CO3 to the precursors by a reactive
                      sintering process. Comparative investigations with the
                      stoichiometric LATP prepared by the same sintering method
                      indicate that the combination effect of reactive sintering
                      and Li2CO3-excess promotes the liquid phase sintering within
                      LATP yielding a high relative density of $95.3\%,$ whereas
                      the stoichiometric LATP can only achieve a comparable
                      relative density at 875 °C. Furthermore, the reactive
                      sintering assisted Li2CO3-excess LATP exhibits a
                      significantly higher ionic conductivity of 0.65 mS cm−1 at
                      25 °C and lower total activation energy of 0.334 eV
                      compared with that of the stoichiometric LATP. Correlative
                      studies on the microstructure and the separated specific
                      grain/grain boundary conductivities for the two samples
                      reveal that the improvement of Li+ conductivity for
                      Li-excess LATP is attributed to its smaller total grain
                      boundary thickness.},
      cin          = {IEK-9 / ER-C-1},
      ddc          = {620},
      cid          = {I:(DE-Juel1)IEK-9-20110218 / I:(DE-Juel1)ER-C-1-20170209},
      pnm          = {122 - Elektrochemische Energiespeicherung (POF4-122) / 535
                      - Materials Information Discovery (POF4-535)},
      pid          = {G:(DE-HGF)POF4-122 / G:(DE-HGF)POF4-535},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000635066400002},
      doi          = {10.1016/j.jpowsour.2021.229631},
      url          = {https://juser.fz-juelich.de/record/890763},
}