Development of lithium ion battery using fiber-type lithium-rich cathode and carbon anode materials

Yi Hung Liu, Tomoaki Takasaki, Kazuya Nishimura, Masahiro Yanagida, Tetsuo Sakai

研究成果: 雜誌貢獻期刊論文同行評審

22 引文 斯高帕斯(Scopus)

摘要

Abstract A lithium ion battery is developed using fiber-type Li-rich cathode and carbon anode materials. The cathode material is synthesized onto the carbon fiber by a two-step reaction process, namely, the electrodeposition for forming the precursor and the hydrothermal treatment for synthesizing the active material. The active material layer is composed of nanoparticles, which can be identified as a 94.8 wt.% primary Li2MnO3 phase together with a 5.2 wt.% minor Li4Mn5O12 phase based on a synchrotron X-ray diffraction analysis. This cathode possesses a typical irreversible capacity during the first charge/discharge cycle, which can be utilized to compensate for the anode one, enabling the full cell to work without an initial predoping. In addition, the cell exhibits a rapid activation, favorable coulomb efficiency and high-rate performance, suggesting that the fiber-type electrodes are structurally beneficial for the electrical conduction and ion diffusion. On the other hand, its discharge capacity fades with cycling, which can be attributed to the phase transformation from the layered Li2MnO3 to the spinel LiMn2O4.

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文章編號21157
頁(從 - 到)153-158
頁數6
期刊Journal of Power Sources
290
DOIs
出版狀態已出版 - 1 9月 2015

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