Nanocrystalline MnO thin film anode for lithium ion batteries with low overpotential

Nanocrystalline MnO thin film anode for lithium ion batteries with low overpotential
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低过电位锂离子电池纳米晶MnO薄膜负极

DOI:
10.1016/j.elecom.2009.01.040
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发表时间:
2009-04
影响因子:
5.4
通讯作者:
Yu, X. Q.
Yu, X. Q.
中科院分区:
工程技术3区
文献类型:
--
作者:
He, Y.;Tang, K.;Huang, X. J.;Sun, J. P.;Li, H.;Chen, L. Q.;Yu, X. Q.

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采用脉冲激光沉积(PLD)方法制备了纳米晶MnO薄膜。在0.125℃下,MnO薄膜电极的可逆储锂容量超过472mAhg−1(3484 mAhcm−3),循环25次后仍能保持90%以上。在6C倍率下,0.125C倍率下的充放电容量均可达到55%。所制备的MnO薄膜电极在过渡金属氧化物中具有最低的充放电过电位值。所有这些性能使MnO成为锂离子电池高容量负极材料。
Nanocrystalline MnO thin film has been prepared by a pulsed laser deposition (PLD) method. The reversible lithium storage capacity of the MnO thin film electrodes at 0.125C is over 472mAhg−1(3484mAhcm−3) and can be retained more than 90% after 25 cycles. At a rate of 6C, 55% value of the capacity at 0.125C rate can be obtained for both charge and discharge. As-prepared MnO thin film electrodes show the lowest values of overpotential for both charge and discharge among transition metal oxides. All these performances make MnO a promising high capacity anode material for Li-ion batteries.
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