Chemical expansion: Implications for electrochemical energy storage and conversion devices

S. R. Bishop, D. Marrocchelli, C. Chatzichristodoulou, N. H. Perry, M. B. Mogensen, H. L. Tuller, E. D. Wachsman

Research output: Contribution to journalArticlepeer-review

Abstract

Many energy-related materials rely on the uptake and release of large quantities of ions, for example, Li± in batteries, H ± in hydrogen storage materials, and O2- in solid-oxide fuel cell and related materials. These compositional changes often result in large volumetric dilation of the material, commonly referred to as chemical expansion. This article reviews the current knowledge of chemical expansion and aspires to facilitate and promote future research in this field by providing a taxonomy for its sources, along with recent atomistic insights of its origin, aided by recent computational modeling and an overview of factors impacting chemical expansion. We discuss the implications of chemical expansion for mechanical stability and functionality in the energy applications above, as well as in other oxide-based systems. The use of chemical expansion as a new means to probe other materials properties, as well as its contribution to recently investigated electromechanical coupling, is also highlighted.

Original languageEnglish (US)
Pages (from-to)205-239
Number of pages35
JournalAnnual Review of Materials Research
Volume44
DOIs
StatePublished - Jul 2014
Externally publishedYes

Keywords

  • Battery
  • Decrepitation
  • Exfoliation
  • Hydrogen storage
  • Mechanical properties
  • Solid-oxide fuel cell

ASJC Scopus subject areas

  • Materials Science(all)

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