April 7 - 11, 2025
Seattle, Washington
2025 MRS Spring Meeting & Exhibit

Symposium EL15-Fundamentals of Mixed Ionic-Electronic Conductors

Mixed ionic-electronic conductors, also known as mixed conductors, are an increasingly important category of materials with applications in energy storage, electrochromic displays, bioelectronics, sensors, electrocatalysis, neuromorphic devices, thermoelectrics, and actuators. Mixed conductors exhibit both ion and electron/hole conductivity, and ionic-electronic coupling (i.e., capacitance), allowing them to effectively transduce ionic signals to electronic ones, and vice versa. In recent years, new mixed conductors have been developed beyond the traditional metals oxides and phosphates to include (semi)conducting polymers, radical polymers, perovskites, and hybrid organic-inorganic materials, enabling improved performance and new functionalities. Despite these advances, challenges remain in characterizing and modeling the dynamic relationship among electronic transport, ionic transport, and material structure during device operation. This symposium will focus on the synthesis, characterization, and modeling of these emerging materials, with an emphasis on their fundamental understanding, existing challenges, and future directions. In particular, new material designs and synthetic approaches, structure-property relationships, mechanical properties, device physics and engineering, electrochemical transistors, in-situ and in-operando characterization, materials and device stability, theory, modeling, and molecular dynamics simulations will be covered. This symposium will provide a unique opportunity to bring together experts in organic, inorganic, and hybrid materials to discuss the fundamentals of mixed ionic-electronic conductors.

Topics will include:

  • Fundamentals of ion and electron/hole transport
  • In situ/operando characterization
  • Design and synthesis of new materials
  • Organic (semi)conductors
  • Radical polymers
  • Perovskites and hybrid materials
  • Metal Oxides
  • Mixed conductor thermoelectrics
  • Device engineering and optimization
  • Mechanical and electronic stability
  • Theory, modeling, and molecular dynamics simulations

Invited Speakers:

  • Natalie Banerji (University of Bern, Germany)
  • Michael Chabinyc (University of California, Santa Barbara, USA)
  • Alex Giovannitti (Chalmers University of Technology, Sweden)
  • Fei Huang (South China University of Technology, China)
  • Laure Kayser (University of Deleware, USA)
  • Jongwoo Lim (Seoul National University, Republic of Korea)
  • Sabine Ludwigs (Universität Stuttgart, Germany)
  • Christine Luscombe (Okinawa Institute of Science and Technology, Japan)
  • Björn Lüssem (Universität Bremen, Germany)
  • Micaela Matta (King's College London, United Kingdom)
  • Iain McCulloch (Princeton University, USA)
  • Jianguo Mei (Purdue University, USA)
  • Davide Moia (Max Planck Institute for Solid State Research, Switzerland)
  • Erin Ratcliff (Georgia Institute of Technology, USA)
  • Alberto Salleo (Stanford University, USA)
  • Brett M. Savoie (Purdue University, USA)
  • Hitoshi Takamura (Tohoku University, Japan)
  • Alessandro Troisi (University of Liverpool, United Kingdom)
  • Choongho Yu (Texas A&M University, USA)

Symposium Organizers

Lucas Flagg
National Institute of Standards and Technology
Materials Science and Engineering Division
USA

Scott Keene
University of Cambridge
Department of Engineering
United Kingdom

Jenny Nelson
Imperial College London
Department of Physics
United Kingdom

Jianyong Ouyang
National University of Singapore
Department of Materials Science and Engineering
Singapore

Topics

in situ operando polymer