Kim, Jihye Ryu, Hanjun Kim, SeongMin Lee, Hyeon Yeong Karami, Armine Galayko, Dimitri Kang, Donghyeon Kwak, Sung Soo Yoon, Hong-Joon Basset, Philippe Kim, Sang-Woo 2024-03-07T02:30:11Z 2024-03-07T02:30:11Z 2024-03-07 2024-04 https://pubs.kist.re.kr/handle/201004/149398 With the development of wearable and wireless electronic devices, the triboelectric nanogenerator (TENG) is attracting interest as a candidate for portable power. Many studies are conducted to increase the surface charge density of the TENG, such as external charge pumping or external electron excitation strategies. However, there are limitations in that another additional external energy source is required. Here, a TENG-capacitor (TC) coupling system that can maximize energy generation and storage efficiency within a limited volume is proposed. Density functional theory calculations indicate that the electric field induced on capacitor increases the fermi energy of positive triboelectric material, resulting in more charge transfer between two triboelectric materials. TC coupling system enhances TENG output performance and the capacitor charging rate in a virtuous cycle. This study provides new insights into TENG structural design and an important guideline for the use of TENG as a portable power source for wearable and wireless applications. Triboelectric nanogenerator (TENG)-capacitor coupling system capable of achieving higher energy generation and storage efficiency is demonstrated. The electrode pattern design of TENG and capacitor induces an electric field on the capacitor electrode, leading to higher surface charge density in the triboelectric layer. This study provides important guidelines for using TENGs as power sources for wearable and wireless applications. image English JOHN WILEY & SONS INC Self-Boosting Energy Generation via Triboelectric Nanogenerator-Capacitor Coupling Article 10.1002/admt.202301309 1 Advanced Materials Technologies, v.9, no.8 Advanced Materials Technologies 9 8 N scie scopus 001165905000001 2-s2.0-85185292274 Materials Science, Multidisciplinary Materials Science Article CHARGE-DENSITY OUTPUT ENHANCEMENT capacitor coupling density functional theory energy harvesting triboelectric nanogenerator