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024 7 _ |a 10.34734/FZJ-2024-02228
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037 _ _ |a FZJ-2024-02228
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100 1 _ |a Hamzelui, Niloofar
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245 _ _ |a Chitosan as Enabling Polymeric Binder Material for Silicon‐Graphite‐Based Anodes in Lithium‐Ion Batteries
260 _ _ |a Weinheim [u.a.]
|c 2023
|b Wiley-VCH
336 7 _ |a article
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500 _ _ |a Unterstützt durch Projekt: “GrEEn”(no. 313-W044B)
520 _ _ |a Massive volume change during (de-)lithiation and subsequent challenges, such as pulverization of active materials, delamination of electrode from the current collector, and fragile solid electrolyte interphase, are among the main impediments hindering the large-scale commercialization of silicon-containing anode materials in lithium-ion batteries. In this regard, designer polymeric binders with unique chemistries are considered as enabling solutions. Polymeric materials endowed with functional groups such as –OH, –COOH/COO−, and –NH2/NH3+, capable of building strong H bonds, are hailed as effective binders for Si-containing anode materials. Herein, chitosan biopolymers are investigated as a green and environmentally friendly binder in a silicon/graphite (Si/Gr) anode and compared to lithium poly(acrylic acid)/sodium carboxymethyl cellulose binders. The effect of degree of acetylation (DA) and degree of polymerization of chitosan on the electrochemical performance of Si/Gr anode-based cells is investigated. Anodes with chitosan binder with DA of 50% show the most promising electrochemical performance in Si/Gr||lithium metal and lithium nickel manganese cobalt oxide (NMC622)||Si/Gr cells. Crosslinking of chitosan binder with citric acid monohydrate in combination with free-standing electrodes results in improved electrochemical performance in full cells. The surface chemistry of electrochemically cycled Si/Gr anodes with/without chitosan binder is investigated by X-ray photoelectron spectroscopy.
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700 1 _ |a Linhorst, Max
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700 1 _ |a Martin Nyenhuis, Gabriela
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700 1 _ |a Haneke, Lukas
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700 1 _ |a Eshetu, Gebrekidan Gebresilassie
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700 1 _ |a Placke, Tobias
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700 1 _ |a Winter, Martin
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700 1 _ |a Moerschbacher, Bruno M.
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700 1 _ |a Figgemeier, Egbert
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773 _ _ |a 10.1002/ente.202201239
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