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Editable Supercapacitors with Customizable Stretchability Based on Mechanically Strengthened Ultralong MnO 2 Nanowire Composite
Author(s) -
Lv Zhisheng,
Luo Yifei,
Tang Yuxin,
Wei Jiaqi,
Zhu Zhiqiang,
Zhou Xinran,
Li Wenlong,
Zeng Yi,
Zhang Wei,
Zhang Yanyan,
Qi Dianpeng,
Pan Shaowu,
Loh Xian Jun,
Chen Xiaodong
Publication year - 2018
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201704531
Subject(s) - supercapacitor , materials science , capacitance , nanotechnology , electrode , wearable computer , nanowire , energy storage , wearable technology , stretchable electronics , optoelectronics , electronics , electrical engineering , power (physics) , computer science , embedded system , chemistry , physics , quantum mechanics , engineering
Although some progress has been made on stretchable supercapacitors, traditional stretchable supercapacitors fabricated by predesigning structured electrodes for device assembling still lack the device‐level editability and programmability. To adapt to wearable electronics with arbitrary configurations, it is highly desirable to develop editable supercapacitors that can be directly transferred into desirable shapes and stretchability. In this work, editable supercapacitors for customizable shapes and stretchability using electrodes based on mechanically strengthened ultralong MnO 2 nanowire composites are developed. A supercapacitor edited with honeycomb‐like structure shows a specific capacitance of 227.2 mF cm −2 and can be stretched up to 500% without degradation of electrochemical performance, which is superior to most of the state‐of‐the‐art stretchable supercapacitors. In addition, it maintains nearly 98% of the initial capacitance after 10 000 stretch‐and‐release cycles under 400% tensile strain. As a representative of concept for system integration, the editable supercapacitors are integrated with a strain sensor, and the system exhibits a stable sensing performance even under arm swing. Being highly stretchable, easily programmable, as well as connectable in series and parallel, an editable supercapacitor with customizable stretchability is promising to produce stylish energy storage devices to power various portable, stretchable, and wearable devices.