Cathode Performance of LiMn2O4 Thick Films Prepared by Gas-Deposition for Lithium Rechargeable Battery
Cathode Performance of LiMn2O4 Thick Films Prepared by Gas-Deposition for Lithium Rechargeable Battery
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气相沉积制备锂二次电池正极材料LiMn2O4厚膜的性能
DOI：
10.5796/electrochemistry.76.293
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发表时间：
2008
期刊：
影响因子：
2.5
通讯作者：
T. Esaka
中科院分区：
文献类型：
--
作者：
S. Takai;H. Sakaguchi;Katsu Tanaka;Y. Nagao;T. Esaka
采用气相沉积（GD）法在铝箔上制备了锂锰氧化物厚膜，不含任何导电剂或粘合剂材料。研究了由 GD 正极和锂金属负极组成的硬币型电池的充电/放电性能，并将其与使用传统用导体和粘合剂制备的正极的情况进行比较。当采用粒径为 10 µm 的 LiMn2O4 粉末作为正极材料时，与传统制备的正极相比，GD 正极在早期循环中表现出较小的放电容量。然而，通过粗磨正极粉末以改变粒度分布，仅对 GD 处理的正极观察到放电容量的明显增强。就循环稳定性而言，GD方法可有效制备具有良好性能的正极材料。
Lithium manganese oxide thick films were prepared on aluminum foils without any conductive agent or binder material by means of gas-deposition (GD) method. Charge/discharge performances were investigated on the coin-type cells consisting of the GD’ed cathode and the lithium metal anode, which were compared with the case using the cathode conventionally prepared with conductor and binder. In the case that LiMn2O4 powders with the particle size of 10 µm were employed as the cathode material, the GD’ed cathode showed smaller discharge capacities in early cycles in comparison with conventionally prepared cathode. However, by roughly milling the cathode powders to modify the particle size distribution, obvious enhancement of discharge capacity was observed only for GD’ed cathode. In terms of the cycle stability, the GD method was effective to prepare the cathode material having a good performance.