Three Dimensional Graphene Based Composite Material for Electrode Application in Li-ion Battery
本論文致力於優化活性物質/石墨烯複合電極的構型,並將其應用於鋰離子電池。我們以磷酸鐵鋰/還原后的氧化石墨烯複合物為例子,首先研究電極的集流體選擇問題。相比常用的二維集流體鋁箔,使用三維集流體可以使磷酸鐵鋰正極的電化學性能得到提升。這是源於使用三維集流體可以降低電極的電荷轉移電阻,同時提高鋰離子的擴散速率。如果進一步引入還原后的氧化石墨烯作為原有三維集流體的二級結構,磷酸鐵鋰正極的電化學性能將有進一步的提升。但是,當電極已有足夠的導電網絡結構,這種增益效應將趨於飽和。 === 為了進一步提升磷酸鐵鋰/還原后的氧化石墨烯複合電極的電化學性能,我們在複合電極中添加鎂離子,使其倍率性能得到明顯的提升(...
Other Authors: | Huang, Yuan (author.) |
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Format: | Others |
Language: | English Chinese |
Published: |
2016
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Subjects: | |
Online Access: | http://repository.lib.cuhk.edu.hk/en/item/cuhk-1292199 |
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