Academic Journal
Free-standing supercapacitors from Kraft lignin nanofibers with remarkable volumetric energy density
| العنوان: | Free-standing supercapacitors from Kraft lignin nanofibers with remarkable volumetric energy density |
|---|---|
| المؤلفون: | Schlee, Philipp, Herou, Servann, Jervis, Rhodri, Shearing, Paul R., Brett, Dan J.L., Baker, Darren, Hosseinaei, Omid, Tomani, Per, Murshed, M. Mangir, Li, Yaomin, Mostazo-López, María José, Cazorla-Amorós, Diego, Jorge, Ana Belen, Titirici, Maria-Magdalena |
| المساهمون: | Universidad de Alicante. Departamento de Química Inorgánica, Universidad de Alicante. Instituto Universitario de Materiales, Materiales Carbonosos y Medio Ambiente |
| بيانات النشر: | Royal Society of Chemistry |
| سنة النشر: | 2019 |
| المجموعة: | RUA - Repositorio Institucional de la Universidad de Alicante |
| مصطلحات موضوعية: | Free-standing supercapacitors, Kraft lignin nanofibers, Remarkable volumetric, Energy density, Química Inorgánica |
| الوصف: | We have discovered a very simple method to address the challenge associated with the low volumetric energy density of free-standing carbon nanofiber electrodes for supercapacitors by electrospinning Kraft lignin in the presence of an oxidizing salt (NaNO3) and subsequent carbonization in a reducing atmosphere. The presence of the oxidative salt decreases the diameter of the resulting carbon nanofibers doubling their packing density from 0.51 to 1.03 mg cm−2 and hence doubling the volumetric energy density. At the same time, the oxidative NaNO3 salt eletrospun and carbonized together with lignin dissolved in NaOH acts as a template to increase the microporosity, thus contributing to a good gravimetric energy density. By simply adjusting the process parameters (amount of oxidizing/reducing agent), the gravimetric and volumetric energy density of the resulting lignin free-standing carbon nanofiber electrodes can be carefully tailored to fit specific power to energy demands. The areal capacitance increased from 147 mF cm−2 in the absence of NaNO3 to 350 mF cm−2 with NaNO3 translating into a volumetric energy density increase from 949 μW h cm−3 without NaNO3 to 2245 μW h cm−3 with NaNO3. Meanwhile, the gravimetric capacitance also increased from 151 F g−1 without to 192 F g−1 with NaNO3. ; We would like to thank EPSRC (EP/R021554/1, EP/N509899/1, EP/P031323/1, EP/S018204/1) for the financial support. |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| Relation: | https://doi.org/10.1039/C8SC04936J; Chemical Science. 2019, 10: 2980-2988. doi:10.1039/C8SC04936J; 2041-6520 (Print); 2041-6539 (Online); http://hdl.handle.net/10045/89828 |
| DOI: | 10.1039/C8SC04936J |
| الاتاحة: | http://hdl.handle.net/10045/89828 https://doi.org/10.1039/C8SC04936J |
| Rights: | This article is licensed under a Creative Commons Attribution 3.0 Unported Licence ; info:eu-repo/semantics/openAccess |
| رقم الانضمام: | edsbas.61FAEBBF |
| قاعدة البيانات: | BASE |
| DOI: | 10.1039/C8SC04936J |
|---|