---
res:
  bibo_abstract:
  - Understanding charge carrier transport in Li2O2, the storage material in the non-aqueous
    Li-O2 battery, is key to the development of this high-energy battery. Here, we
    studied ionic transport properties and Li self-diffusion in nanocrystalline Li2O2
    by conductivity and temperature variable 7Li NMR spectroscopy. Nanostructured
    Li2O2, characterized by a mean crystallite size of less than 50 nm as estimated
    from X-ray diffraction peak broadening, was prepared by high-energy ball milling
    of microcrystalline lithium peroxide with μm sized crystallites. At room temperature
    the overall conductivity σ of the microcrystalline reference sample turned out
    to be very low (3.4 × 10−13 S cm−1) which is in agreement with results from temperature-variable
    7Li NMR line shape measurements. Ball-milling, however, leads to an increase of
    σ by approximately two orders of magnitude (1.1 × 10−10 S cm−1); correspondingly,
    the activation energy decreases from 0.89 eV to 0.82 eV. The electronic contribution
    σeon, however, is in the order of 9 × 10−12 S cm−1 which makes less than 10% of
    the total value. Interestingly, 7Li NMR lines of nano-Li2O2 undergo pronounced
    heterogeneous motional narrowing which manifests in a two-component line shape
    emerging with increasing temperatures. Most likely, the enhancement in σ can be
    traced back to the generation of a spin reservoir with highly mobile Li ions;
    these are expected to reside in the nearest neighbourhood of defects generated
    or near the structurally disordered and defect-rich interfacial regions formed
    during mechanical treatment.@eng
  bibo_authorlist:
  - foaf_Person:
      foaf_givenName: A.
      foaf_name: Dunst, A.
      foaf_surname: Dunst
  - foaf_Person:
      foaf_givenName: V.
      foaf_name: Epp, V.
      foaf_surname: Epp
  - foaf_Person:
      foaf_givenName: I.
      foaf_name: Hanzu, I.
      foaf_surname: Hanzu
  - foaf_Person:
      foaf_givenName: Stefan Alexander
      foaf_name: Freunberger, Stefan Alexander
      foaf_surname: Freunberger
      foaf_workInfoHomepage: http://www.librecat.org/personId=A8CA28E6-CE23-11E9-AD2D-EC27E6697425
    orcid: 0000-0003-2902-5319
  - foaf_Person:
      foaf_givenName: M.
      foaf_name: Wilkening, M.
      foaf_surname: Wilkening
  bibo_doi: 10.1039/c4ee00496e
  bibo_issue: '8'
  bibo_volume: 7
  dct_date: 2014^xs_gYear
  dct_isPartOf:
  - http://id.crossref.org/issn/1754-5692
  - http://id.crossref.org/issn/1754-5706
  dct_language: eng
  dct_publisher: RSC@
  dct_title: Short-range Li diffusion vs. long-range ionic conduction in nanocrystalline
    lithium peroxide Li2O2—the discharge product in lithium-air batteries@
...