Hybrid Piezo/Triboelectric‐Driven Self‐Charging Electrochromic Supercapacitor Power Package. Issue 23 (29th May 2018)

• Record Type: Journal Article
• Authors: Qin, Shanshan; Zhang, Qian; Yang, Xixi; Liu, Mengmeng; Sun, Qijun; Wang, Zhong Lin
• Is Part Of: Advanced energy materials. Volume 8:Issue 23(2018)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2018-05-29
• Subjects: electrochromic -- hybrid nanogenerators -- micro‐supercapacitors -- piezo/triboelectric -- self‐charging energy packages; 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.201800069
• Languages: English
• ISSNs: 1614-6832

Abstract

Abstract: The rapid development of personal electronics imposes a great challenge on sustainable and maintenance‐free power supplies. The integration of nanogenerators (NG) and electrochromic supercapacitors (SC) offers a promising solution to efficiently convert mechanical energy to stored electrical energy in a predictable and noticeable manner. In this paper, by integrating hybrid NGs and electrochromic micro‐SCs (µ‐SCs) array, the authors demonstrate a smart self‐charging power package capable of indicating the charging state with color change. The electrochromic µ‐SC employs Ag nanowires/NiO as electrode materials, exhibiting high capacitance (3.47 mF cm −2 ) and stable cycling performance (80.7% for 10000 cycles). The hybrid NG can produce a high output voltage of 150 V and an enhanced output current of 20 µA to satisfy the self‐charging requirements. The integrated electrochromic µ‐SCs array is capable of self‐charging to 3 V to light up a LED under human palm impact. The charging states can be estimated according to the color differences with the naked eye during the self‐charging process. Moreover, it is possible to design the planar interdigitated electrodes into different shapes according to user demand. The proposed simple and cost‐effective approaches for smart self‐charging power package may pave the way for future intelligent, independent and continuous operation of daily electronics. Abstract : A flexible, compact, and smart self‐charging power package is developed. It is capable of indicating the charging state with color change by integrating a hybrid piezo/triboelectric nanogenerator and a solid‐state electrochromic micro‐supercapacitor array.