کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7724762 | 1497835 | 2018 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Electrochemical properties of MgH2 - TiH2 nanocomposite as active materials for all-solid-state lithium batteries
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
This study reports on solid-state batteries operating at 120â¯Â°C prepared with metal hydride MH nanocomposites xMgH2+(1-x)TiH2 used as active materials for the positive electrode, metallic Li as the negative electrode and LiBH4 as the solid electrolyte. The molar content x of the MH nanocomposites ranged from 0.2 to 0.8. The electrochemical properties of the metal hydride electrodes are here scrutinized as a function of the chemical composition of the active materials. Mg-rich nanocomposites offer higher specific capacity (over 1700â¯mAh gâ1 at C/50 regime for xâ¯=â¯0.7), whereas Ti-rich ones exhibit better cycle-life (ca. 100% capacity retention after 10 cycles for xâ¯=â¯0.2). In comparison to equivalent liquid electrolyte cells operated at RT, solid-state cells show improved properties such as a coulombic efficiency above 98% and a rate capability of ca. 50% of delivered capacity at 1C-rate. It is also evidenced that mass transport within the working electrode is a key factor limiting the reversibility of hydride conversion reactions. This work represents a deep insight on the hurdles of metal hydrides to be used as efficient anode materials for Li-ion batteries.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Power Sources - Volume 397, 1 September 2018, Pages 143-149
Journal: Journal of Power Sources - Volume 397, 1 September 2018, Pages 143-149
نویسندگان
Anh Ha Dao, Nicola Berti, Pedro López-Aranguren, Junxian Zhang, FermÃn Cuevas, Christian Jordy, Michel Latroche,