کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5149335 | 1497878 | 2017 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Synthesis and electrochemical properties of 4LiF-NiMn2O4 composite as a cathode material for Li-ion batteries
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Synthesis and electrochemical properties of 4LiF-NiMn2O4 composite as a cathode material for Li-ion batteries Synthesis and electrochemical properties of 4LiF-NiMn2O4 composite as a cathode material for Li-ion batteries](/preview/png/5149335.png)
چکیده انگلیسی
4LiF-NiMn2O4 composites are synthesized by the mechanical milling of LiF and NiMn2O4 in a molar ratio of 4: 1 for 36-192 h. The synthesized composites are investigated by XRD, charge-discharge measurements, and XPS. A broad XRD peak of 4LiF-NiMn2O4 was observed and those of LiF and NiMn2O4 disappear after the milling of 144 h and more. The discharge capacity of the 4LiF-NiMn2O4 composites changes with the milling time, with the composite prepared by milling for 144 h exhibiting a discharge capacity of 256 mA h gâ1 at 0.1 C for voltages of 2.0-4.8 V. With a cut-off voltage of 4.8 V or more, decomposition of the electrolyte proceeds along with the charge process, so the charge-discharge current efficiency deteriorates and the discharge voltage decreases. In the charge-discharge measurement without the capacity limit, although the charge-discharge efficiency was low due to the decomposition of the electrolyte, the high discharge capacity of 310 mA h gâ1 was obtained. The XPS data suggests that the Ni2+ ion and Mn3+ ion are oxidized to Ni3+ and Mn4+ ion in charge process up to 4.8 V and are reduced to Ni2+ ion and Mn3+ ion during the discharge process.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Power Sources - Volume 354, 30 June 2017, Pages 34-40
Journal: Journal of Power Sources - Volume 354, 30 June 2017, Pages 34-40
نویسندگان
Yasumasa Tomita, Noritaka Kimura, Yusuke Izumi, Juichi Arai, Yoshiumi Kohno, Kenkichiro Kobayashi,