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Lithium Ion Battery Separators Based On Carboxylated Cellulose Nanofibers From Wood
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Centres, Wallenberg Wood Science Center. KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Chemical Engineering, Applied Electrochemistry.
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Centres, Wallenberg Wood Science Center. Stockholm Univ, Dept Mat & Environm Chem, SE-10691 Stockholm, Sweden.
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Chemical Engineering, Applied Electrochemistry. Northvolt AB, Gamla Brogatan 26, SE-11120 Stockholm, Sweden.ORCID iD: 0000-0003-1713-1659
Stockholm Univ, Dept Mat & Environm Chem, SE-10691 Stockholm, Sweden..
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2019 (English)In: ACS APPLIED ENERGY MATERIALS, ISSN 2574-0962, Vol. 2, no 2, p. 1241-1250Article in journal (Refereed) Published
Abstract [en]

Carboxylated cellulose nanofibers, prepared by TEMPO-mediated oxidation (TOCN), were processed into asymmetric mesoporous membranes using a facile paper-making approach and investigated as lithium ion battery separators. Membranes made of TOCN with sodium carboxylate groups (TOCN-COO-Na+) showed capacity fading after a few cycles of charging and discharging. On the other hand, its protonated counterpart (TOCN-COOH) showed highly improved electrochemical and cycling stability, displaying 94.5% of discharge capacity maintained after 100 cycles at 1 C rate of charging and discharging. The asymmetric surface porosity of the membranes must be considered when assembling a battery cell as it influences the rate capabilities of the battery. The wood-based TOCN-membranes have a good potential as an ecofriendly alternative to conventional fossil fuel-derived separators without adverse side effects.

Place, publisher, year, edition, pages
American Chemical Society (ACS), 2019. Vol. 2, no 2, p. 1241-1250
Keywords [en]
cellulose, Li-ion batteries, separator, TEMPO-oxidized cellulose, protonation
National Category
Chemical Engineering
Identifiers
URN: urn:nbn:se:kth:diva-246267DOI: 10.1021/acsaem.8b01797ISI: 000459948900036Scopus ID: 2-s2.0-85064990880OAI: oai:DiVA.org:kth-246267DiVA, id: diva2:1299279
Note

QC 20190326

Available from: 2019-03-26 Created: 2019-03-26 Last updated: 2019-05-16Bibliographically approved

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Kim, HyeyunLu, HuiranLindbergh, GöranCornell, Ann M.

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