摘要：SummaryIn contrast to enormous progresses in electrode active materials, little attention has been paid to electrode sheets despite their crucial influence on practical battery performances. Here, as a facile strategy to address this issue, we demonstrate nanofibrous conductive electrode binders based on deoxyribonucleic acid (DNA)-wrapped single-walled carbon nanotubes (SWCNT) (denoted as DNA@SWCNT). DNA@SWCNT binder allows the removal of conventional polymeric binders and carbon powder additives in electrodes. As a proof of concept, high-capacity overlithiated layered oxide (OLO) is chosen as a model electrode active material. Driven by nanofibrous structure and DNA-mediated chemical functionalities, the DNA@SWCNT binder enables improvements in the redox reaction kinetics, adhesion with metallic foil current collectors, and chelation of heavy metal ions dissolved from OLO. The resulting OLO cathode exhibits a fast charging capability (relative capacity ratio after 15 min [versus 10 h] of charging = 83%), long cyclability (capacity retention = 98% after 700 cycles), and thermal stability.Graphical AbstractDisplay OmittedHighlights•A multifunctional binder based on DNA-wrapped SWCNT is demonstrated•DNA@SWCNT binder shows improved adhesion with metallic foil current collectors•DNA@SWCNT binder enables chelation of heavy metal ions dissolved from cathode materials•DNA@SWCNT binder-containing cathode exhibits fast-charging capabilityNanotechnology; Nanomaterials; Energy Materials
