We created biphasic electrode suspensions composed of dispersed active particles and uniformly percolated conductive particles, different from the clustered suspensions using traditional suspension preparation procedures.
Significance and Impact
Our biphasic suspensions are the first to simultaneously possess high energy density, fast charge transport, and low-dissipation flow, a crucial step toward high performance SSFC such as thicker electrodes and faster cycling rates.
- By using a steric stabilizer Polyvinylpyrrolidone (PVP) and proper colloidal suspension processing steps (milling, filtration, consolidation, mixing), biphasic suspensions were created.
- Through nano-CT imaging, rheological measurements, electrochemical characterizations, and analytical modeling, biphasic suspensions have improved particle distribution, flow and cycling properties than traditional suspensions.
Work performed at Harvard University (JCESR collaborator), Massachusetts Institute of Technology (JCESR collaborator), and University of Illinois at Urbana-Champaign (JCESR partner) T. S. Wei, F. Fan, A. Helal, K. Smith, G. McKinley, Y.-M. Chiang, J. Lewis, Adv. Energy Mater. 2015,