Lithium salt of carboxymethyl cellulose as an aqueous binder for thick graphite electrode in lithium ion batteries

Title
Lithium salt of carboxymethyl cellulose as an aqueous binder for thick graphite electrode in lithium ion batteries
Authors
백운규
Keywords
lithium salt of carboxymethyl cellulose; Li-CMC; water soluble binder; thick electrode; lithium ion batteries; LIBs
Issue Date
2015-05
Publisher
POLYMER SOC KOREA
Citation
MACROMOLECULAR RESEARCH, v. 23, NO 8, Page. 719-725
Abstract
The increase in a graphite electrode thickness is an inevitable to achieve the high energy density of lithium ion batteries (LIBs). However, the increment of electrode thickness results in a significant degradation of the electrochemical performances due to a poor kinetic associated with lithium ion caused by a long lithium ion diffusion length and large polarization. To improve the kinetic associated with lithium ion, the lithium salt of carboxymethyl cellulose (Li-CMC) is introduced as a binder. The Li-CMC is synthesized from sodium salt of carboxymethyl cellulose (Na-CMC) via simple two-step method. The thick graphite electrode prepared with Li-CMC exhibits much improved electrochemical performances, including a specific capacity and a cycle performance, compared to that with Na-CMC. The voltage profiles, electrochemical impedance spectroscopy (EIS), and rate capabilities results indicate that these improvements are attributed to improved lithium ion kinetics and low polarization by employing Li-CMC binder.
URI
http://link.springer.com/article/10.1007%2Fs13233-015-3094-1http://hdl.handle.net/20.500.11754/24661
ISSN
1598-5032; 2092-7673
DOI
http://dx.doi.org/10.1007/s13233-015-3094-1
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ENERGY ENGINEERING(에너지공학과) > Articles
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