Controlled Prelithiation of Silicon Monoxide for High Performance Lithium-Ion Rechargeable Full Cells
المؤلف | Kim, Hye Jin |
المؤلف | Choi, Sunghun |
المؤلف | Lee, Seung Jong |
المؤلف | Seo, Myung Won |
المؤلف | Lee, Jae Goo |
المؤلف | Deniz, Erhan |
المؤلف | Lee, Yong Ju |
المؤلف | Kim, Eun Kyung |
المؤلف | Choi, Jang Wook |
تاريخ الإتاحة | 2021-06-03T09:23:16Z |
تاريخ النشر | 2016 |
اسم المنشور | Nano Letters |
المصدر | Scopus |
الرقم المعياري الدولي للكتاب | 15306984 |
الملخص | Despite the recent considerable progress, the reversibility and cycle life of silicon anodes in lithium-ion batteries are yet to be improved further to meet the commercial standards. The current major industry, instead, adopts silicon monoxide (SiOx, x 1), as this phase can accommodate the volume change of embedded Si nanodomains via the silicon oxide matrix. However, the poor Coulombic efficiencies (CEs) in the early period of cycling limit the content of SiOx, usually below 10 wt % in a composite electrode with graphite. Here, we introduce a scalable but delicate prelithiation scheme based on electrical shorting with lithium metal foil. The accurate shorting time and voltage monitoring allow a fine-tuning on the degree of prelithiation without lithium plating, to a level that the CEs in the first three cycles reach 94.9%, 95.7%, and 97.2%. The excellent reversibility enables robust full-cell operations in pairing with an emerging nickel-rich layered cathode, Li[Ni0.8Co0.15Al0.05]O2, even at a commercial level of initial areal capacity of 2.4 mAh cm-2, leading to a full cell energy density 1.5-times as high as that of graphite-LiCoO2 counterpart in terms of the active material weight. 2015 American Chemical Society. |
اللغة | en |
الناشر | American Chemical Society |
الموضوع | Coulombic efficiency cycle life full cell prelithiation silicon monoxide |
النوع | Article |
الصفحات | 282-288 |
رقم العدد | 1 |
رقم المجلد | 16 |
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