Neural information systems, particularly the brain, depend on electrical activity for generating, transmitting, and processing information. Detecting the neural electrical activity of living organisms is pivotal in brain science research, clinical investigations into neurological and psychiatric disorders, and the exploration of brain-computer interface (BCI) applications. Implantable neural microelectrodes constitute the backbone of BCIs, enabling their integration into the brains of living animals to record the electrical signals of individual neurons without disrupting normal brain function. To meet the unique demands of brain tissue, surmount the challenges posed by the blood-brain barrier and immune response, and achieve high-throughput, long-term recording of faint neural electrical signals (on the order of microvolts), these sensors must exhibit remarkable environmental resilience, high channel density, exceptional biocompatibility, and a superior signal-to-noise ratio.