TriMethylene sulfite as a novel additive for SEI film formation in lithium-ion batteries
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ORIGINAL PAPER
TriMethylene sulfite as a novel additive for SEI film formation in lithium-ion batteries Liuyang Zhao 1 & Dong Jing 1 & Yueli Shi 1 & Quanchao Zhuang 1 & Yongli Cui 1 & Zhicheng Ju 1 & Yanhua Cui 2 Received: 30 March 2020 / Revised: 3 June 2020 / Accepted: 4 June 2020 # Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract In this study, TriMethylene sulfite (TMS) was evaluated as a new electrolyte additive for improving the performances of lithiumion batteries (LIBs). Charge-discharge, cyclic voltammetry (CV), scanning electron microscope (SEM), X-ray photoelectron spectroscopy (XPS), and electrochemical impedance spectroscopy (EIS) were used to analyze the electrochemical reaction processes. The results showed that the initial charge capacities of the graphite electrode in electrolytes without and with TMS were 332.54 and 362.93 mAh g−1, respectively. After 100 cycles, the charge capacities were 321.05 and 353.4 mAh g−1 and the capacity retention rates were 96.6 and 97.4%, respectively. The impedance of the electrode in the electrolyte with TMS was reduced. These improvements in performance were benefited from the effective formation of a stable, compact, and smooth solid electrolyte interface (SEI) film with low resistance. Keywords TriMethylene sulfite . Lithium-ion batteries . Electrolyte additives . Solid electrolyte interface film
Introduction Nowadays, graphite, the commercial anode material, is the most extensively used in available lithium-ion batteries (LIBs) due to its good electrical conductivity, low potential, low cost, and relatively high theoretical capacity (372 mAh g−1) [1]. Electrolyte, usually composed of lithium salts and organic carbonates, is one of the most important factors that affect the performance of graphite electrodes [2, 3]. The solid electrolyte interface (SEI) film, the decomposition product of part electrolytes during the first intercalation of lithium [4], could prevent further decomposition of the electrolyte [5, 6], Electronic supplementary material The online version of this article (https://doi.org/10.1007/s11581-020-03650-1) contains supplementary material, which is available to authorized users. * Yueli Shi [email protected] * Quanchao Zhuang [email protected] 1
School of Materials Science and Engineering, China University of Mining and Technology, Xuzhou 221116, People’s Republic of China
2
Institute of Electronic Engineering China Academy of Engineering Physics, Mianyang 621000, People’s Republic of China
thereby avoid damage to the surface of the graphite electrode and prevent the graphite electrode from peeling off [7]. However, the irreversible capacity loss is accompanied by the formation of the SEI film during the first chargedischarge cycle of LIBs, and gradual capacity decay may be due to thickening of the SEI film [8–13]. A compact and smooth SEI film could enhance the stability and cycling performances of the electrodes [9, 13–16]. In general, the composition of the electrolyte determines the performance of SEI film [17–20].
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