Defect chemistry of interfacial storage

Chia-Chin Chen, Lijun Fu, Dominik Samuelis

An extra Li storage in M/Li2O and  M/LiF nanocomposites was observed, besides bulk  insertion and conversion reaction. Li ions are accommodated at the LiX side; electrons are stored at metal side; Neither of the composites’ constituents can store Li, but the composite synergistically can, therefore this is also called ‘Job-Sharing mechanism’ [1, 2].

When the particle size of the nanocomposites is small enough, the interfacial storage and bulk storage can be blurred, thus the interfacial storage provides a bridge between supercapacitor  and Li-ion battery (Scheme. 1).

A thermodynamic model for interfacial storage was developed, which describes both semi-infinite and mesoscopic  boundary conditions [3].

Scheme 1. Scheme of lithium interfacial storage. When the particle sizes of the nanocomposites are small enough, the bulk storage and interfacial storage is blurred.

Publications:

  1. J. Jamnik and J. Maier, Phys. Chem. Chem. Phys., 2003, 5, 5215-5220. DOI: 10.1039/b309130a
  2. J. Maier, Faraday Discuss., 2007, 134, 51-66. DOI: 10.1039/b603559k
  3. J. Maier, Angew. Chem. Int. Ed., 2013, 52(19), 4998–5026. DOI: 10.1002/anie.201205569
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