An unmovable single-layer triboloelectric generator driven by sliding friction

359We present a flexible single layer triboelectric nanogenerator (S-TEG) which remains fixed without any movement during the whole operation. Various materials can be utilized to generate electricity with no relevance to their position in triboelectric series, which greatly broadens the S-TEG׳s application field. Besides, the output voltage can be greatly enhanced by using the slippage of two S-TEGs. When one S-TEG slides on another, the maximum peak output voltage can reach 342.8 V and more than 1000 nC charges are transferred in each sliding cycle. Owing to the simple fabrication process, S-TEG devices using this structure are suitable for mass production. A demonstration was conducted to illustrate the potential of this S-TEG device to harvest energy from sliding surfaces encountered in daily life.