کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7726490 | 1497861 | 2017 | 12 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
How silicon electrodes can be calendered without altering their mechanical strength and cycle life
ترجمه فارسی عنوان
چگونه الکترودهای سیلیکون را بدون تغییر توان و نیروی مکانیکی خود و دوره چرخه کالیبراسیون می شود
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کلمات کلیدی
باتری لیتیوم یون، آند آنزیم مبتنی بر سی، تقویم، رفتار انبساط / انقباض،
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
چکیده انگلیسی
The calendering of Si-based electrodes is required to obtain a substantial gain in their volumetric capacity compared to conventional graphite electrode. However, as shown in the present study performed on silicon/carbon nanoplatelets/carboxymethyl cellulose electrodes, their calendering induces a major decrease of their cycling stability. This can be attributed to the rupture of the particle-binder bridges during the calendering, lowering the mechanical strength of the electrode. It is found that these cohesive bonds can be restored through an appropriate post-calendering treatment (called maturation). It consists of storing the calendered electrode in a humid atmosphere for a few days before drying and cell assembly. From in-operando dilatometric experiments, it appears that the volumetric expansion is lower and more reversible than for a standard (not-calendered, not-matured) electrode. As a result, a remarkable improvement of the cycle life is observed. However, when cycled in Si/NMC full cell, a rapid capacity decay is observed because of the SEI instability.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Power Sources - Volume 371, 15 December 2017, Pages 136-147
Journal: Journal of Power Sources - Volume 371, 15 December 2017, Pages 136-147
نویسندگان
Z. Karkar, T. Jaouhari, A. Tranchot, D. Mazouzi, D. Guyomard, B. Lestriez, L. Roué,