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Free-standing super...
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Schlee, PhilippQueen Mary University of London, UK
(author)
Free-standing supercapacitors from kraft lignin nanofibers with remarkable volumetric energy density
- Article/chapterEnglish2019
Publisher, publication year, extent ...
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Royal Society of Chemistry,2019
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LIBRIS-ID:oai:DiVA.org:ri-37669
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https://urn.kb.se/resolve?urn=urn:nbn:se:ri:diva-37669URI
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https://doi.org/10.1039/C8SC04936JDOI
Supplementary language notes
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Language:English
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Summary in:English
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Subject category:ref swepub-contenttype
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Subject category:art swepub-publicationtype
Notes
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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.
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Herou, ServannQueen Mary University of London, UK; Imperial College London, UK
(author)
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Jervis, RhodriUniversity College London, UK
(author)
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Shearing, Paul RUniversity College London, UK
(author)
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Brett, Dan J. L.University College London, UK
(author)
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Baker, DarrenRISE,Bioraffinaderi och energi
(author)
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Hosseinaei, OmidRISE,Bioraffinaderi och energi(Swepub:ri)omidho@ri.se
(author)
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Tomani, PerRISE,Bioraffinaderi och energi(Swepub:ri)PerTom@ri.se
(author)
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Murshed, Mangir M.University of Bremen, Germany; Imperial College London, UK
(author)
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Li, YaominUniversity College London, UK
(author)
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Mostazo-Lopez, Maria JoseUniversidad de Alicante, Spain
(author)
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Cazorla-Amoros, DiegoaUniversidad de Alicante, Spain
(author)
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Sobrido, Ana Belen JorgeQueen Mary University of London, UK
(author)
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Titirici, Maria-MagdalenaQueen Mary University of London, UK; Imperial College London, UK
(author)
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Queen Mary University of London, UKQueen Mary University of London, UK; Imperial College London, UK
(creator_code:org_t)
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In:Chemical Science: Royal Society of Chemistry10:10, s. 2980-29882041-6539
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Schlee, Philipp
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Herou, Servann
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Jervis, Rhodri
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Shearing, Paul R
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Brett, Dan J. L.
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Baker, Darren
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Hosseinaei, Omid
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Tomani, Per
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Li, Yaomin
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Sobrido, Ana Bel ...
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