Unveiling the Fabrication of 鈥淩ocking-Chair鈥?Type 3.2 and 1.2 V Class Cells Using Spinel LiNi0.5Mn1.5O4 as Cathode with Li4Ti5O12

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• 作者：Nagasubramanian Arun ; Vanchiappan Aravindan ; Sundaramurthy Jayaraman ; Srinivasan Madhavi
• 刊名：Journal of Physical Chemistry C
• 出版年：2015
• 出版时间：October 29, 2015
• 年：2015
• 卷：119
• 期：43
• 页码：24332-24336
• 全文大小：391K
• ISSN：1932-7455

文摘

We first report the possibility of using spinel LiNi_0.5Mn_1.5O₄ (LNM) nanofibers as cathode for constructing high (鈭?.2 V) and low (鈭?.2 V) voltage 鈥渞ocking-chair鈥?type Li-ion cells with spinel Li₄Ti₅O₁₂ (LTO) by utilizing Li-insertion into tetrahedral (Ni^2+/4+) and octahedral (Mn^4+/3+) sites of LNM. We also explored the possibility of constructing symmetric cells (LNM/LNM) with a working potential of 鈭?.8 V. Among the three configurations investigated, LNM/LTO (electrochemically prelithiated) is found superior in terms of high rate capability, cyclability, and good capacity retention characteristics. High performance spinel LNM nanofibers are prepared via a scalable electrospinning technique and their Li-insertion properties are evaluated in half-cell assembly. The half-cell studies are used for adjusting the mass balance while fabricating 鈥渞ocking-chair鈥?Li-ion cells.