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Aqueous Organic Zinc-Ion Hybrid Supercapacitors Prepared by 3D Vertically Aligned Graphene-Polydopamine Composite Electrode
| Content Provider | MDPI |
|---|---|
| Author | Cui, Ruowei Zhang, Zhenwang Zhang, Huijuan Tang, Zhihong Xue, Yuhua Yang, Guangzhi |
| Copyright Year | 2022 |
| Description | A three-dimensional vertical-aligned graphene-polydopamine electrode (PDA@3DVAG) composite with vertical channels and conductive network is prepared by a method of unidirectional freezing and subsequent self-polymerization. When the prepared PDA@3DVAG is constructed as the positive electrode of zinc-ion hybrid supercapacitors (ZHSCs), excellent electrochemical performances are obtained. Compared with the conventional electrolyte, PDA@3DVAG composite electrode in highly concentrated salt electrolyte exhibits better multiplicity performance (48.92% at a current density of 3 A $g^{−1}$), wider voltage window (−0.8~0.8 V), better cycle performance with specific capacitance from 96.7 to 59.8 F $g^{−1}$, and higher energy density (46.14 Wh $kg^{−1}$). |
| Starting Page | 386 |
| e-ISSN | 20794991 |
| DOI | 10.3390/nano12030386 |
| Journal | Nanomaterials |
| Issue Number | 3 |
| Volume Number | 12 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2022-01-25 |
| Access Restriction | Open |
| Subject Keyword | Nanomaterials Zinc-ion Supercapacitor Three-dimensional Vertically Aligned Graphene Polydopamine Highly Concentrated Salt Electrolyte |
| Content Type | Text |
| Resource Type | Article |
