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Effects of Different Manufacturing Processes on TEMPO-Oxidized Carboxylated Cellulose Nanofiber Performance as Binder for Flexible Lithium-Ion Batteries
KTH, School of Chemical Science and Engineering (CHE), Chemical Engineering and Technology, Applied Electrochemistry.ORCID iD: 0000-0003-1713-1659
KTH.
KTH, School of Chemical Science and Engineering (CHE), Fibre and Polymer Technology.
KTH, School of Chemical Science and Engineering (CHE), Centres, Wallenberg Wood Science Center.
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2017 (English)In: ACS Applied Materials and Interfaces, ISSN 1944-8244, E-ISSN 1944-8252, Vol. 9, no 43, p. 37712-37720Article in journal (Refereed) Published
Abstract [en]

Carboxylated cellulose nanofibers (CNF) prepared using the TEMPO-route are good binders of electrode components in flexible lithium-ion batteries (LIB). However, the different parameters employed for the defibrillation of CNF such as charge density and degree of homogenization affect its properties when used as binder. This work presents a systematic study of CNF prepared with different surface charge densities and varying degrees of homogenization and their performance as binder for flexible LiFePO4 electrodes. The results show that the CNF with high charge density had shorter fiber lengths compared with those of CNF with low charge density, as observed with atomic force microscopy. Also, CNF processed with a large number of passes in the homogenizer showed a better fiber dispersibility, as observed from rheological measurements. The electrodes fabricated with highly charged CNF exhibited the best mechanical and electrochemical properties. The CNF at the highest charge density (ISSO mu mol g(-1)) and lowest degree of homogenization (3 + 3 passes in the homogenizer) achieved the overall best performance, including a high Young's modulus of approximately 311 MPa and a good rate capability with a stable specific capacity of 116 mAh g(-1) even up to 1 C. This work allows a better understanding of the influence of the processing parameters of CNF on their performance as binder for flexible electrodes. The results also contribute to the understanding of the optimal processing parameters of CNF to fabricate other materials, e.g., membranes or separators.

Place, publisher, year, edition, pages
2017. Vol. 9, no 43, p. 37712-37720
National Category
Polymer Technologies
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URN: urn:nbn:se:kth:diva-218223DOI: 10.1021/acsami.7b10307ISI: 000414506600023PubMedID: 28972727Scopus ID: 2-s2.0-85032657306OAI: oai:DiVA.org:kth-218223DiVA, id: diva2:1160833
Note

QC 20171128

Available from: 2017-11-28 Created: 2017-11-28 Last updated: 2018-03-12Bibliographically approved

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Lu, HuiranKim, HyeyunLindbergh, GöranCornell, Ann M.

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Lu, HuiranGuccini, ValentinaKim, HyeyunSalazar-Alvarez, GermanLindbergh, GöranCornell, Ann M.
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Applied ElectrochemistryKTHFibre and Polymer TechnologyWallenberg Wood Science Center
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