کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
8037694 1518290 2018 17 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Towards optimization of experimental parameters for studying Li-O2 battery discharge products in TEM using in situ EELS
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فناوری نانو (نانو تکنولوژی)
پیش نمایش صفحه اول مقاله
Towards optimization of experimental parameters for studying Li-O2 battery discharge products in TEM using in situ EELS
چکیده انگلیسی
The key to understanding the performance of Li-O2 batteries is to study the chemical and structural properties of their discharge product(s) at the nanometer scale. Using TEM for this purpose poses challenges due to the sensitivity of samples to air and electron beams. This paper describes our use of in situ EELS to evaluate experimental procedures to reduce electron-beam degradation and presents methods to deal with air sensitivity. Our results show that Li2O2 decomposition is dependent on the total dose and is approximately 4-5 times more pronounced at 80 than at 200 kV. We also demonstrate the benefits of using low-dose-rate STEM. We show further that a “graphene cell”, which encapsulates the sample within graphene sheets, can protect the sample against air and e-beam damage.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ultramicroscopy - Volume 188, May 2018, Pages 52-58
نویسندگان
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