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Toward Fast Operation of Lithium Batteries: Ion Activity as the Factor to Determine the Concentration Polarization by Kim, Dong-Hui; Hwang, Sunwook; Cho, Jeong-Ju; Yu, Sunghoon; Kim, Soojin; Jeon, Jongho; Ahn, Kyoung Ho; Lee, Chulhaeng; Song, Hyun-Kon; Lee, Hochun is a Engineering article available to read on EtoBox.
What is Toward Fast Operation of Lithium Batteries: Ion Activity as the Factor to Determine the Concentration Polarization about?
The concentration polarization, in addition to the activation and ohmic polarizations, limits the fast operation of electrochemical cells such as Li-ion batteries (LIBs). We herein demonstrate an approach to mitigate the concentration polarization by regulating the effective concentration (i.e., the mean ionic activity) of Li-ions. The use of an acrylate-based gel polymer electrolyte (A-GPE) improved the rate capability of LIBs, compared to that of its liquid counterpart. Electrochemical and spectroscopic evidence confirms that the unexpected power performance of the A-GPE is ascribed to the unique solvation structure surrounding the Li-ions. The solvation structure suppresses abnormal increase of the activity of Li-ions and thus mitigates the concentration polarization during high-rate discharge. Importantly, this study rejects the common wisdom that the solid or semi-solid electrolytes discourage the fast charge/discharge of LIBs and suggests an avenue to simultaneously enhance both the safety and high-power performance of rechargeable batteries.
Who reads Toward Fast Operation of Lithium Batteries: Ion Activity as the Factor to Determine the Concentration Polarization?
It is typically read by researchers, students, and practitioners in Engineering.
- Author
- Kim, Dong-Hui; Hwang, Sunwook; Cho, Jeong-Ju; Yu, Sunghoon; Kim, Soojin; Jeon, Jongho; Ahn, Kyoung Ho; Lee, Chulhaeng; Song, Hyun-Kon; Lee, Hochun
- Publisher
- American Chemical Society; American Chemical Society (ACS) (ISSN 2380-8195)
- Published
- 2019
- Language
- EN
- Field
- Engineering (Physical Sciences)