Details

Autor(en) / Beteiligte

• Jak, M.J.G.
• Kelder, E.M.
• Schoonman, J.

Titel

Defect Structure of Li-Doped BPO4: A Nanostructured Ceramic Electrolyte for Li-Ion Batteries

Ist Teil von

• Journal of solid state chemistry, 1999-01, Vol.142 (1), p.74-79

Ort / Verlag

San Diego, CA: Elsevier Inc

Erscheinungsjahr

1999

Quelle

Elsevier Journal Backfiles on ScienceDirect (DFG Nationallizenzen)

Beschreibungen/Notizen

• In this paper the defect chemistry of Li-doped BPO4(BPO4–xLi2O, 0≤x≤0.1) is studied. This nanostructured ceramic electrolyte is used in all-solid-state Li-ion batteries. By changing the Li-doping level the influence on the crystal structure is studied and related to t he properties of the material. X-ray diffraction, Fourier-transformed infra-red spectroscopy (FT-IR),31P,11B, and7Li magic-angle-spinning solid state nuclear magnetic resonance, neutron diffraction, and inductively coupled plasma optical-emission spectroscopy measurements are used in order to study the structure. The electrical properties are studied with AC-impedance spectroscopy (AC-IS). The experimental data show that the defect structure of Li-doped BPO4can be described with two defect models, Li″B+2Li·iand V‴B+3Li·i, suggesting that the ionic conductivity takes place via interstitial Li ions.