Affiliation:
1. State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and Engineering Donghua University Shanghai 201620 China
2. School of Advanced Materials Peking University Shenzhen Graduate School Shenzhen 518055 China
3. College of Information Science and Technology Donghua University Shanghai 201620 China
4. Shanghai Institute of Microsystem and Information Technology Chinese Academy of Sciences Shanghai 200050 China
Abstract
AbstractSliding‐freestanding triboelectric nanogenerators (SF‐TENGs) are desirable for application in wearable power sources; however, improving their durability is the primary challenge. Meanwhile, few studies focus on enhancing the service life of tribo‐materials, especially from an anti‐friction perspective during dry operation. Herein, for the first time, a surface‐textured film with self‐lubricating property is introduced into the SF‐TENG as a tribo‐material, which is obtained by the self‐assembly of hollow SiO2 microspheres (HSMs) close to a polydimethylsiloxane (PDMS) surface under vacuum conditions. The PDMS/HSMs film with micro‐bump topography simultaneously reduces the dynamic coefficient of friction from 1.403 to 0.195 and increases the electrical output of SF‐TENG by an order of magnitude. Subsequently, a textured film and self‐adapting contact synergized bidirectional rotary TENG (TAB‐TENG) is developed, and the superiorities of the soft flat rotator with bidirectional reciprocating rotation are systematically investigated. The obtained TAB‐TENG exhibits a remarkable output stability and an outstanding mechanical durability over 350 000 cycles. Furthermore, a smart foot system for stepping energy harvesting and wireless walking states monitoring is realized. This study proposes a pioneering strategy for extending the lifetime of SF‐TENGs and advances it toward practical wearable applications.
Funder
National Natural Science Foundation of China
Fundamental Research Funds for the Central Universities
Subject
Biomaterials,Biotechnology,General Materials Science,General Chemistry
Cited by
3 articles.
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