Necklace-like Nitrogen-Doped Tubular Carbon 3D Frameworks for Electrochemical Energy Storage
ADVANCED FUNCTIONAL MATERIALS, cilt.30, sa.10, 2020 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 30 Sayı: 10
- Basım Tarihi: 2020
- Doi Numarası: 10.1002/adfm.201909725
- Dergi Adı: ADVANCED FUNCTIONAL MATERIALS
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, Applied Science & Technology Source, Chimica, Communication Abstracts, Compendex, INSPEC, Metadex, Civil Engineering Abstracts
- Anahtar Kelimeler: energy storage, metal-organic frameworks, supercapacitors, tetrapods, zinc-ion capacitors, ZEOLITIC IMIDAZOLATE FRAMEWORK, METAL-ORGANIC FRAMEWORKS, HIGH-PERFORMANCE, HOLLOW CARBON, FILM, SUPERCAPACITORS, ELECTRODES, BATTERIES, NANORODS, ZIF-8
- Eskişehir Osmangazi Üniversitesi Adresli: Hayır
Özet
The design and synthesis of a necklace-like nitrogen-doped tubular carbon (NTC) are presented by growing microporous polyhedral ZIF-8 particles and a uniform layer of ZIF-8 on sacrificial ZnO tetrapods (ZTPs). Oxygen vacancies together with defect regions on the surface of the ZTPs result in the formation of ZIF-8 polyhedra in conjunction with a very thin shell. This necklace-like NTC structure has a high N content, very large surface area, ultrahigh microporosity, and quite high electrical conductivity. NTC-based symmetrical supercapacitor and zinc-ion capacitor (ZIC) devices are fabricated and their electrochemical performance is measured. The NTC supercapacitor shows an ultrahigh rate capability (up to 2000 mV s(-1)) and promising cycle life, retaining 91.5% of its initial performance after 50 000 galvanostatic charge-discharge cycles. An aqueous ZIC, constructed using the NTC, has a specific capacitance of 341.2 F g(-1) at a current density of 0.1 A g(-1) and an energy density of 189.6 Wh kg(-1) with a 2.0-V voltage window, respectively. The outstanding performance is attributed to the NTC high N-doping content, a continuous "polyhedral 3D hollow" architecture and the highly porous microtubular arms exhibiting very high surface area.