Chitosan as Enabling Polymeric Binder Material for Silicon‐Graphite‐Based Anodes in Lithium‐Ion Batteries
Energy Technology, vol. 11
Abstract
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 –NH 2 /NH 3 + , 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.
Authors 9
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Affiliation as printed
Institute for Power Electronics and Electrical Drives (ISEA) RWTH Aachen University 52074 Aachen Germany
Institute for Power Electronics and Electrical Drives (ISEA), RWTH Aachen University, 52074 Aachen, Germany
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Affiliation as printed
Institute for Biology and Biotechnology of Plants (IBBP) University of Münster 48143 Münster Germany
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Affiliation as printed
Institute for Power Electronics and Electrical Drives (ISEA) RWTH Aachen University 52074 Aachen Germany
Institute for Power Electronics and Electrical Drives (ISEA), RWTH Aachen University, 52074 Aachen, Germany
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Affiliation as printed
MEET Battery Research Center University of Münster 48149 Münster Germany
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Gebrekidan Gebresilassie Eshetu corresponding Aachen Institute for Power Electronics and Electrical Drives (ISEA)
Mekelle University · RWTH Aachen University
Affiliation as printed
Department of Chemistry College of Natural and Computational Sciences Mekelle University 231 Mekelle Ethiopia
Institute for Power Electronics and Electrical Drives (ISEA) RWTH Aachen University 52074 Aachen Germany
Department of Chemistry, College of Natural and Computational Sciences, Mekelle University, 231 Mekelle, Ethiopia
Institute for Power Electronics and Electrical Drives (ISEA), RWTH Aachen University, 52074 Aachen, Germany
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Affiliation as printed
MEET Battery Research Center University of Münster 48149 Münster Germany
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Forschungszentrum Jülich · University of Münster · Helmholtz-Institute Münster
Affiliation as printed
Helmholtz Institute Münster (HI MS) IEK-12 Forschungszentrum Jülich 52074 Aachen Germany
MEET Battery Research Center University of Münster 48149 Münster Germany
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Affiliation as printed
Institute for Biology and Biotechnology of Plants (IBBP) University of Münster 48143 Münster Germany
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Forschungszentrum Jülich · Helmholtz-Institute Münster · RWTH Aachen University
Affiliation as printed
Helmholtz Institute Münster (HI MS) IEK-12 Forschungszentrum Jülich 52074 Aachen Germany
Helmholtz Institute Münster (HI MS) IEK-12 Forschungszentrum Jülich Corrensstraße 46 48149 Münster Germany
Institute for Power Electronics and Electrical Drives (ISEA) RWTH Aachen University 52074 Aachen Germany
Institute for Power Electronics and Electrical Drives (ISEA), RWTH Aachen University, 52074 Aachen, Germany
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