“Charge-Transfer” Process at Graphite/Electrolyte Interface and the Solvation Sheath Structure of Li[sup +] in Nonaqueous Electrolytes
Year: 2007
Type: article
Abstract: The temperature- and electrolyte-dependences of the so-called charge-transfer process at graphite/electrolyte interface were investigated with impedance analyses at lithiation potential ( vs Li), and characteristic correlations between the activation energies of the process and the electrolyte compositions (such as solvent ratio and salt concentration) were established. It was found that the solvation sheath structure of is dependent on the ratios of cyclic (such as EC) to linear carbonates (such as DMC), which in turn results in different chemistries of graphite/electrolyte interfaces and dictates the -transport across such interfaces. The interdependences thus revealed could serve as useful guidelines to tailoring electrolytes of Li-ion batteries for sub-zero temperature applications.
DOI: 10.1149/1.2409866
Author: Kang Xu
Institution: DEVCOM Army Research Laboratory
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W2017441468