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Design of Battery Electrodes with Dual‐Scale Porosity to Minimize Tortuosity and Maximize Performance

2012; Volume: 25; Issue: 9 Linguagem: Inglês

10.1002/adma.201204055

1521-4095

Chang‐Jun Bae, Can K. Erdonmez, John W. Halloran, Yet‐Ming Chiang,

Advanced Battery Technologies Research

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. As a service to our authors and readers, this journal provides supporting information supplied by the authors. Such materials are peer reviewed and may be re-organized for online delivery, but are not copy-edited or typeset. Technical support issues arising from supporting information (other than missing files) should be addressed to the authors. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.