کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
194355 459789 2006 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Electrolyte additive trimethyl phosphite for improving electrochemical performance and thermal stability of LiCoO2 cathode
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی مهندسی شیمی (عمومی)
پیش نمایش صفحه اول مقاله
Electrolyte additive trimethyl phosphite for improving electrochemical performance and thermal stability of LiCoO2 cathode
چکیده انگلیسی

The purpose of this paper is to investigate compositions on the interface between LiCoO2 and electrolyte when trimethyl phosphite TMP(i) is used as an additive in 1 M LiPF6/EC + DEC electrolyte system and the thermal stability of the electrolyte as well as Li0.5CoO2 mixed with the electrolyte. The electrochemical performance of LiCoO2 electrode in the two electrolyte systems was also studied. It is found that the electrochemical performance, including capacity, cycle performance and 3.6 V plateau efficiency, has been improved in the electrolyte with TMP(i) additive. FTIR analysis indicates that LixPOy is an important surface film composition on the cathode in TMP(i) containing system. A thicker and more passivating surface layer is formed when using TMP(i) additive as an additive. The thermal stability of the cathode is substantially improved in the electrolyte containing TMP(i) additive in the system, especially the exothermic peak around 190 °C, which is associated with the reaction between active surface of cathode and solvents, is obviously restrained.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Electrochimica Acta - Volume 52, Issue 2, 25 October 2006, Pages 636–642
نویسندگان
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