Premium
Design of Battery Electrodes with Dual‐Scale Porosity to Minimize Tortuosity and Maximize Performance
Author(s) -
Bae ChangJun,
Erdonmez Can K.,
Halloran John W.,
Chiang YetMing
Publication year - 2013
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201204055
Subject(s) - tortuosity , porosity , materials science , battery (electricity) , cathode , electrode , scale (ratio) , channel (broadcasting) , dual (grammatical number) , computer science , power (physics) , electrical engineering , composite material , computer network , art , chemistry , physics , literature , quantum mechanics , engineering
Electrode pore topology can be tuned to improve battery power without sacrificing energy density. One effective design has “dual‐scale” porosity, combining aligned channels and a porous matrix. Iterated co‐extrusion yields sintered cathodes of this architecture, with channel spacing tunable down to ∼15 μm. Results show that net tortuosity is reduced compared to homogeneous porosity, significantly improving cell‐discharge rates.