Electrocatalytic oxygen reduction of three-dimensional carbon fiber-based composites for seawater oxygen-dissolved battery
| Autor: | Zhang Haibing, Li Ma, Xin Yonglei, Juxin Yu, Duan Tigang, Yanzhuo Lv |
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| Rok vydání: | 2021 |
| Předmět: |
Battery (electricity)
Materials science Renewable Energy Sustainability and the Environment Graphene Process Chemistry and Technology Organic Chemistry Oxide Energy Engineering and Power Technology chemistry.chemical_element Electrochemistry Oxygen Cathode law.invention Inorganic Chemistry chemistry.chemical_compound chemistry law Materials Chemistry Ceramics and Composites Seawater Composite material Power density |
| Zdroj: | Carbon Letters. 32:537-546 |
| ISSN: | 2233-4998 1976-4251 |
| DOI: | 10.1007/s42823-021-00283-w |
| Popis: | One-step hydrothermal reduction method was used to prepare three-dimensional carbon fiber brush-based graphene–platinum (CFB/Pt–G) composites to improve the electrocatalytic oxygen reduction activity of cathode materials for seawater oxygen-dissolved battery. Characterization results show that the reduced graphene oxide of as-prepared graphene–platinum composite displays the few-layer folded structure. In addition, Pt nanoparticles with the polycrystalline structure dispplay a preferential growth along the crystal plane of (111) and are mainly distributed around the defect cavities of folded graphene. Electrochemical results show that the diffusion-limited current density of CFB/Pt–G composite tested with 1600 rpm/min in 3.5% NaCl solution reaches 5 mA/cm2, while that of CFB/G is only 2.64 mA/cm2. Battery discharge results show that the maximum volume power density of CFB/Pt–G–Mg battery with a stable open voltage of 1.73 V is 81 times as much as the commercial seawater battery SWB1200. |
| Databáze: | OpenAIRE |
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