Ultrathin Nanoflakes Assembled 3D Hierarchical Mesoporous Co₃O₄ Nanoparticles for High‐Rate Pseudocapacitors

A novel 3D hierarchical mesoporous Co3O4 structure assembled by ultrathin nanoflakes (2.4 nm in thickness) has been successfully developed. Combining a high specific surface area (183.8 m2 g–1), mesoporosity, and a stable 3D hierarchical structure render the as-synthesized 3D Co3O4 the properties of a promising active material for high-rate pseudocapacitors with high specific capacitance, excellent rate capability, and durable long-term stability. 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.