Flexible Ultrafast Aqueous Rechargeable Ni//Bi Battery Based on Highly Durable Single‐Crystalline Bismuth Nanostructured Anode

A new type of ultrafast Ni//Bi battery with high flexibility and impressive electrochemical performance is demonstrated for the first time based on an as-prepared Bi electrode as the anode and a NiCo2O4 nanowire electrode as the cathode. The NiCo2O4//Bi battery is able to deliver a remarkable energy density of 85.8 W h kg−1 at a power density of 1.02 kW kg−1, and still retains 55.4 W h kg−1 when the power density is increased to 21.2 kW kg−1. 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.