کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7739044 1497985 2014 17 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
In operando X-ray diffraction study of Li7MnN4 upon electrochemical Li extraction-insertion: A reversible three-phase mechanism
موضوعات مرتبط
مهندسی و علوم پایه شیمی الکتروشیمی
پیش نمایش صفحه اول مقاله
In operando X-ray diffraction study of Li7MnN4 upon electrochemical Li extraction-insertion: A reversible three-phase mechanism
چکیده انگلیسی
The Li7MnN4 structural response upon the first Li extraction-insertion cycle is highlighted using in operando XRD experiments. A 3-phases mechanism involving two biphasic regions for 0.1 ≲ x ≲ 0.8 and 0.8 ≲ x ≲ 1.2 in Li7−xMnN4 and a solid solution behaviour (1.2 ≲ x ≲ 1.5) explains its electrochemical fingerprint. These successive structural transitions do not change the cubic symmetry of the cell and induce a limited cell contraction (∼7%) associated to a reversible mechanical strain. This finding partly explains the excellent cycle life of this promising negative electrode for Li-ion batteries.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Power Sources - Volume 247, 1 February 2014, Pages 402-405
نویسندگان
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