Abstract
In order to prevent the electrolyte decomposition of liquid state Al-plastic film lithium-ion batteries during overcharge, the redox reactions of 2-chloro-1,4-dimethoxybenzene and 4-fluoro-1,2-dimethoxy-benzene as possible electrolyte additives were characterized by using overcharge tests, galvanostatic charge–discharge techniques, linear sweep voltammetry tests, rate capability tests, and cycling tests. Results indicate that for both additives, the initial charge reaction occurred at 4.1 V and their redox products were shuttled between the cathode and anode. The shuttle reactions will consume excess current, thus resulting in an improvement on overcharge performance for the batteries. In addition, the additives had little negative effects on the electrochemical performance when the current was low.
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Acknowledgments
This work was supported by the National Natural Science Foundation of China (Project No. 21001097), the Basic and Frontier Technology Research Program of Henan Province, China (Project No. 102300410107), the Project for Outstanding Young Teachers in Higher Education Institutions of Henan Province [Project No. Henan Higher Education (2009)844], the Key Projects of Science and Technology in Zhengzhou City (Project No. 0910SGYG23259), and the Key Projects of Science and Technology in Jinshui District, Zhengzhou City [Project No. (2009)35-35].
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Zhang, Y., Wang, L., Zhang, A. et al. Application of 2-chloro-1,4-dimethoxybenzene and 4-fluoro-1,2-dimethoxybenzene additives in electrolyte for liquid state Al-plastic film lithium-ion batteries. Ionics 17, 421–427 (2011). https://doi.org/10.1007/s11581-011-0520-z
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DOI: https://doi.org/10.1007/s11581-011-0520-z