کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
218683 463212 2014 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Dimethyl sulfite as an additive for lithium bis(oxalate)borate/γ-Butyrolacton electrolyte to improve the performance of Li-ion battery
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Dimethyl sulfite as an additive for lithium bis(oxalate)borate/γ-Butyrolacton electrolyte to improve the performance of Li-ion battery
چکیده انگلیسی


• Dimethyl sulfite is studied as an additive in LiBOB/γ-Butyrolacton electrolyte.
• The electrode thermal stability is improved.
• The polarization of LiCoO2 is decreased and the capacity is improved.
• The MCMB is well protected by a polished and effective film.

Dimethyl sulfite (DMS) is studied as an additive in lithium bis(oxalate)borate (LiBOB)/γ-Butyrolacton(GBL) electrolyte with LiCoO2 cathode and mesocarbon microbeads (MCMB) anode. Electrochemical performances of LiCoO2/DMS-electrolyte/Li and Li/DMS-electrolyte/MCMB half cells are studied by cyclic voltammetry, battery cycler, scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS). Thermal behaviors of electrode–electrolyte coexisting systems are evaluated using a C80 micro-calorimeter. The electrochemical results show that the polarization of LiCoO2 is decreased and the capacity is improved with the addition of proper content of DMS. The XPS and SEM examination show that the presence of DMS decreases the decomposition of BOB anion and modifies the formation of SEI film on the surface of MCMB anode. The C80 micro-calorimeter analysis shows that the electrode materials with a LiBOB/GBL + proper DMS electrolyte begin to release heat at higher temperature and generate less heat than that with a common electrolyte. Therefore, using proper content (such as 20%) of DMS as an additive in LiBOB/GBL electrolyte is beneficial for the performance of Li-ion batteries.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Electroanalytical Chemistry - Volume 731, 1 October 2014, Pages 119–127
نویسندگان
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