Ultrahigh energy density supercapacitors through a double hybrid strategy
Herein, we are presenting all-solid-state symmetric supercapacitors (ASSSCs) with an innovative double hybrid strategy, where a hybrid material based on reduced graphene oxide (rGO) anchored with phoshotungstic acid, rGO-HPWO) is combined with hybrid electrolyte (hydroquinone-doped gel electrolyte)....
| Autores: | , , , , , , |
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| Tipo de documento: | artigo |
| Data de publicação: | 2017 |
| País: | España |
| Recursos: | Universitat Autònoma de Barcelona |
| Repositório: | Dipòsit Digital de Documents de la UAB |
| Idioma: | inglês |
| OAI Identifier: | oai:ddd.uab.cat:225337 |
| Acesso em linha: | https://ddd.uab.cat/record/225337 https://dx.doi.org/urn:doi:10.1016/j.mtener.2017.05.001 |
| Access Level: | Acceso aberto |
| Palavra-chave: | Reduced graphene oxide-phosphotungstate hybrid Hydroquinoe-doped gel electrolyte Symmetric supercapacitors Ultrahigh energy density |
| Resumo: | Herein, we are presenting all-solid-state symmetric supercapacitors (ASSSCs) with an innovative double hybrid strategy, where a hybrid material based on reduced graphene oxide (rGO) anchored with phoshotungstic acid, rGO-HPWO) is combined with hybrid electrolyte (hydroquinone-doped gel electrolyte). Initially, a hybrid electrode is fabricated by decorating HPWO nanodots onto the surface rGO (rGO-PW). Next, a symmetric cell based on rGO-PW electrodes was assembled with PVA-HSO polymer gel-electrolyte. Interestingly, rGO-PW symmetric cell revealed a substantial enhancement in the cell performance as compared to parent rGO systems. It featured a widened potential range of 1.6 V, thereby providing 1.05 mWh/cm energy density. The electrochemical performance of rGO-PW cell was further advanced by introducing redox-active (hydroquinone) species in to the PVA-HSO gel-electrolyte. Indeed, the performance of rGO-PW cell was surprisingly improved with an ultra-high energy density of 2.38 mWh/cm (more than two-fold). |
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