Carboxymethyl chitosan: A new water soluble binder for Si anode of Li-ion batteries

Carboxymethyl chitosan (C-chitosan) is investigated as a new water soluble binder for Si anode of Li-ion batteries. The Fourier transformation infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS) measurements reveal that the strong hydrogen bonding is formed between the hydroxylat...

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Bibliographic Details
Published in:Journal of power sources 2014-02, Vol.247, p.327-331
Main Authors: Yue, Lu, Zhang, Lingzhi, Zhong, Haoxiang
Format: Article
Language:English
Subjects:
Anodes
Applied sciences
Binders
Chitosan
Direct energy conversion and energy accumulation
Electrical engineering. Electrical power engineering
Electrical power engineering
Electrochemical conversion: primary and secondary batteries, fuel cells
Exact sciences and technology
Hydrogen bonding
Infrared spectroscopy
Lithium-ion batteries
Materials
Silicon
X-ray photoelectron spectroscopy
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Summary:Carboxymethyl chitosan (C-chitosan) is investigated as a new water soluble binder for Si anode of Li-ion batteries. The Fourier transformation infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS) measurements reveal that the strong hydrogen bonding is formed between the hydroxylated Si surface and the polar groups (-OH, -COOH and -NH2) of C-chitosan. The Si/C-chitosan anode (Si:carbon black:C-chitosan = 62:30:8 in weight ratio) exhibits a high first discharge capacity (4270 mAh g-1) with a first coulombic efficiency of 89%, and maintains a capacity of 950 mAh g-1 at the current density of 500 mA g-1 over 50 cycles.
ISSN:0378-7753
1873-2755
DOI:10.1016/j.jpowsour.2013.08.073