Graphene–Polymer Nanocomposite‐Based Redox‐Induced Electricity for Flexible Self‐Powered Strain Sensors. Issue 22 (23rd May 2018)

• Record Type: Journal Article
• Authors: Wang, Yuanming; Wang, Yang; Yang, Ya
• Is Part Of: Advanced energy materials. Volume 8:Issue 22(2018)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2018-05-23
• Subjects: flexible -- graphene -- redox -- self‐powered -- strain sensors; Energy harvesting -- Materials -- Periodicals; Energy conversion -- Materials -- Periodicals; Energy storage -- Materials -- Periodicals; Photovoltaics -- Periodicals; Fuel cells -- Periodicals; Thermoelectric materials -- Periodicals; 621.31
• DOI: 10.1002/aenm.201800961
• Languages: English
• ISSNs: 1614-6832

Abstract

Abstract: Graphene as a powerful inorganic material such as excellent conductivity and ideal mechanical strength has recently been extensively utilized to develop flexible strain sensors. However, graphene‐based strain sensors usually suffer from the deficiencies of stretchability, sensitivity, and sensing range, which can restrict their applications in wearable devices. Here, a novel strain sensor is designed by integrating graphene/ecoflex film and meandering zinc wire into the flexible base. The constructed strain sensor not only possesses high stretchability of up to 150% strain but can also self‐generates current signals from redox‐induced electricity, where the stable current and voltage signals of about 75 µA and 0.83 V can be obtained, respectively. Furthermore, the self‐powered sensor presents a broad and linear sensing range of 25% to 150% strains and a fast response time of less than 0.11 s. Attached on human body, the sensor has been utilized to realize the motion detection of knee joint. Abstract : A novel flexible self‐powered strain sensor is designed based on highly stretchable graphene film and weaved meandering zinc wire. The self‐powered sensor can deliver stable current signals form redox‐induced electricity. The sensing device shows superior stretchability, fast response time and the ability of motion detections. This work provides new opportunities for developing next generation of flexible strain sensors.