As energy storage devices, electrochemical double-layer capacitors (EDLCs) are a potential alternative to traditional batteries owing to their higher charge-discharge capability, higher power density, and longer life span
however, EDLCs typically lack energy density. Carbon nanotubes (CNTs), which have a high surface area and excellent conductivity, are promising for improving the energy density in EDLCs. In this study, an innovative approach was adopted to fabricate CNT-metal electrodes, in which chemical bonds between vertically aligned carbon nanotubes (VACNTs) and Au metal were formed via a linker molecule, resulting in robust, highly electrically conductive CNT-Au bonds without compromising the free-standing nature and quality of the VACNT array. Specifically, VACNT arrays prepared through chemical vapor deposition on an Al