A collaborative research team from the Beijing Institute of Technology (BIT) and Beihang University (BUAA) has successfully developed an ultra-soft, highly breathable multi-channel ear-computer interface (ECI) patch, which is crafted using MXene material. At present, non-invasive EEG caps or bands, along with implantable chips, often bring about inconveniences or face acceptance challenges in the realm of brain-computer interface applications. This ECI patch, designed to be worn behind the ear, incorporates MXene electrodes. It not only ensures outstanding adhesion for the reliable collection of brain electrical signals but also boasts superior breathability, causes no skin irritation, and possesses antibacterial properties. This effectively tackles the safety issues that can arise from prolonged wear. During experiments designed to induce fatigue, the patch attained an average classification accuracy of 90.5%. In online 4-target SSVEP brain-computer interface classification experiments, its average accuracy soared to an impressive 93.5%, on par with the performance of commercial EEG caps.