TY  - JOUR
AU  - Hamzelui, Niloofar
AU  - Linhorst, Max
AU  - Martin Nyenhuis, Gabriela
AU  - Haneke, Lukas
AU  - Eshetu, Gebrekidan Gebresilassie
AU  - Placke, Tobias
AU  - Winter, Martin
AU  - Moerschbacher, Bruno M.
AU  - Figgemeier, Egbert
TI  - Chitosan as Enabling Polymeric Binder Material for Silicon‐Graphite‐Based Anodes in Lithium‐Ion Batteries
JO  - Energy technology
VL  - 11
IS  - 3
SN  - 2194-4288
CY  - Weinheim [u.a.]
PB  - Wiley-VCH
M1  - FZJ-2024-02228
SP  - 2201239
PY  - 2023
N1  - Unterstützt durch Projekt: “GrEEn”(no. 313-W044B)
AB  - 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.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000917799100001
DO  - DOI:10.1002/ente.202201239
UR  - https://juser.fz-juelich.de/record/1024548
ER  -