کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4907797 | 1426576 | 2017 | 29 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Ultrafine Nd2O3 nanoparticles doped carbon aerogel to immobilize sulfur for high performance lithium-sulfur batteries
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
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چکیده انگلیسی
The carbon aerogel (CA) uniformly doped neodymium oxide (Nd2O3) nanoparticle was synthesized by an effective in-situ method via acid catalyzing and used as the cathode matrix for lithium-sulfur batteries. The doped materials with interconnected pore structure of CA and evenly dispersed Nd2O3 offer crucial confinement role to anchor sulfur and suppress the loss of polysulfide ions for interrelate function of S/polysulfides by Nd2O3. The composited sulfur electrodes present high electrochemical performances and initial discharge capacities, especially, the Nd2-CA/S sample gains initial discharge capacity of 1327 mAh gâ 1 at 0.2 C and remains at 1082 mAh gâ 1 after 100 cycles. Meanwhile, it still remains capacity of about 907 mAh gâ 1 at 0.5 C after 300 cycles. The enhanced electrochemical performances can be ascribed to the crosslink mesoporous CA materials and well distributed neodymium oxide. Furthermore, the metal additive also takes promoting effect on redox reactions of the Li/S batteries presenting higher discharge voltages.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Electroanalytical Chemistry - Volume 799, 15 August 2017, Pages 617-624
Journal: Journal of Electroanalytical Chemistry - Volume 799, 15 August 2017, Pages 617-624
نویسندگان
Xueliang Li, Luyao Zhang, Zhongqiang Ding, Yang He,