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@ARTICLE{Beltrop:851120,
      author       = {Beltrop, K. and Beuker, S. and Heckmann, A. and Winter, M.
                      and Placke, T.},
      title        = {{A}lternative electrochemical energy storage:
                      potassium-based dual-graphite batteries},
      journal      = {Energy $\&$ environmental science},
      volume       = {10},
      number       = {10},
      issn         = {1754-5706},
      address      = {Cambridge},
      publisher    = {RSC Publ.},
      reportid     = {FZJ-2018-04822},
      pages        = {2090 - 2094},
      year         = {2017},
      abstract     = {In this contribution, we report for the first time a novel
                      potassium ion-based dual-graphite battery concept (K-DGB),
                      applying graphite as the electrode material for both the
                      anode and cathode. The presented dual-graphite cell utilizes
                      a potassium ion containing, ionic liquid (IL)-based
                      electrolyte, synergetically combining the extraordinary
                      properties of potassium, graphite and ILs in terms of cost
                      effectiveness, sustainability and safety. The IL electrolyte
                      shows a very stable cycling performance in combination with
                      the graphite anode at a so far not reported reversible
                      capacity of ≈230 mA h g−1. A highly reversible capacity
                      of >42 mA h g−1 (with respect to the graphite cathode)
                      even at a current of 250 mA g−1, and a Coulombic
                      efficiency (CE) exceeding $99\%$ in a potential range from
                      3.4 V to 5.0 V vs. K/K+ represent the corner pillars of this
                      innovative battery technology. The very promising
                      electrochemical performance is further emphasized by a
                      capacity retention of $95\%$ after 1500 cycles. Furthermore,
                      the electrochemical formation of a stage-1 potassium
                      graphite intercalation compound (K-GIC) from an IL
                      electrolyte, resulting in a stoichiometry of KC8 is
                      presented in this work for the first time. The presented
                      results shed new light on an alternative energy storage
                      technology, especially in view of stationary (“grid”)
                      energy storage by employing environmentally friendly,
                      abundant and recyclable materials.},
      cin          = {IEK-12},
      ddc          = {690},
      cid          = {I:(DE-Juel1)IEK-12-20141217},
      pnm          = {131 - Electrochemical Storage (POF3-131)},
      pid          = {G:(DE-HGF)POF3-131},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000412765600003},
      doi          = {10.1039/C7EE01535F},
      url          = {https://juser.fz-juelich.de/record/851120},
}