All-in-One Graphene Based Composite Fiber: Toward Wearable Supercapacitor
| Autor: | Ricky Tjandra, Zhongwei Chen, Wenwen Liu, Lucas Lim, Aiping Yu, Yangshuai Liu, Lathankan Rasenthiram |
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| Rok vydání: | 2017 |
| Předmět: |
Supercapacitor
Materials science Graphene Composite number Nanotechnology 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 7. Clean energy Capacitance Pseudocapacitance 0104 chemical sciences law.invention law General Materials Science Fiber Coaxial 0210 nano-technology Short circuit |
| Zdroj: | ACS Applied Materials & Interfaces. 9:39576-39583 |
| ISSN: | 1944-8252 1944-8244 |
| DOI: | 10.1021/acsami.7b10182 |
| Popis: | Graphene fibers (GF) have aroused great interest in wearable electronics applications because of their excellent mechanical flexibility and superior electrical conductivity. Herein, an all-in-one graphene and MnO2 composite hybrid supercapacitor fiber device has been developed. The unique coaxial design of this device facilitates large-scale production while avoiding the risk of short circuiting. The core backbone of the device consists of GF that not only provides mechanical stability but also ensures fast electron transfer during charge–discharge. The introduction of a MnO2 (200 nm in length) hierarchical nanostructured film enhanced the pseudocapacitance dramatically compared to the graphene-only device in part because of the abundant number of active sites in contact with the poly(vinyl alcohol) (PVA)/H3PO4 electrolyte. The entire device exhibits outstanding mechanical strength as well as good electrocapacitive performance with a volumetric capacitance of 29.6 F cm–3 at 2 mv s–1. The capacitance of th... |
| Databáze: | OpenAIRE |
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