Application of Alginate Binders to Graphite Electrodes and Characterization of Their Lithium-Ion Battery Performance

Autor:	Kazunari Soeda, Masaki Yamagata, Yukiko Matsui, Masashi Ishikawa
Rok vydání:	2013
Předmět:	Materials science Magazine Chemical engineering law Composite material Lithium-ion battery law.invention Characterization (materials science) Graphite electrode
Zdroj:	ECS Transactions. 53:93-102
ISSN:	1938-6737 1938-5862
DOI:	10.1149/05329.0093ecst
Popis:	Alginate salts (Alg-salt) were used as binders for graphite electrodes in both ionic liquid (IL)- and organic-electrolyte-based lithium-ion batteries (LIBs). Two different types of Alg-salt were used in this study: Alg-Na and Alg-Mg. According to the cyclic voltammograms and charge–discharge measurements, a graphite negative electrode with the Alg-Na binder in both IL and conventional organic electrolytes exhibited reversible and high C-rate capability compared with an electrode with an SBR binder. This implies that the high affinity of Alg for graphite electrode active materials decreases the electrode/electrolyte interfacial resistance. We also fabricated full cells composed of the prepared graphite electrode with Alg-salt and LiNi1/3Co1/3Mn1/3O2 (NMC/C+Alg-X, X = Na+ or Mg2+). During high-voltage (3.0–4.5 V) operation, NMC/C+Alg-Mg showed the most stable cycle performance with high coulombic efficiency. These results suggest that the Alg-salt binder, especially the Alg-Mg binder, can be used in the fabrication of high-performance LIBs with either an IL- or organic-based electrolyte.
Databáze:	OpenAIRE
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