Stability of the LiMn₂O₄surface in a LiPF₆-based non-aqueous electrolyte studied by in-situ atomic force microscopy

• Mitsunori Kitta

• Masanori Kohyama

抄録

Investigation of the surface stability of electrode materials in a liquid electrolyte is significantly important for understanding the deterioration of stored Li-ion battery cells. Here, we examined LiMn 2 O 4 surfaces in a LiPF 6 -based non-aqueous electrolyte by in-situ atomic force microscopy. A LiMn 2 O 4 (111) surface sample with a well-defined atomically-flat structure was prepared from a MnO(111) wafer. Although the surfaces of non-exposed or dry-air-exposed samples did not change in a typical electrolyte such as LiPF 6 dissolved in propylene carbonate, the surface morphology of an air-exposed sample greatly changed under the same condition. Transmission electron microscopy observation revealed that the surface roughness is increased by the dissolution of one or two atomic layers of LiMn 2 O 4 -crystal surfaces in the electrolyte. The adsorbed water on the air-exposed surface is the origin of this phenomenon.

収録刊行物

• Japanese Journal of Applied Physics

  Japanese Journal of Applied Physics 55 (6), 065801-, 2016-05-09

  IOP Publishing

キーワード

• General Physics and Astronomy
• General Engineering

詳細情報

• CRID: 1360003449890562304
• NII論文ID: 210000146591
• DOI: 10.7567/jjap.55.065801
• ISSN: 13474065
• ISSN: 00214922
• ISSN: http://id.crossref.org/issn/13474065
• Web Site: http://stacks.iop.org/1347-4065/55/i=6/a=065801/pdf
• Web Site: http://stacks.iop.org/1347-4065/55/i=6/a=065801?key=crossref.bf679a382c7dab21289d8896be8a9866
• Web Site: https://iopscience.iop.org/article/10.7567/JJAP.55.065801
• Web Site: https://iopscience.iop.org/article/10.7567/JJAP.55.065801/pdf
• データソース種別:
  • Crossref
  • CiNii Articles