Electrochemical behaviors of Li[Li(1-x)/3Mn(2-x)/3Nix/3Cox/3]O2 cathode series (0 < x < 1) synthesized by sucrose combustion process for high capacity lithium ion batteries
Electrochemical behaviors of Li[Li(1-x)/3Mn(2-x)/3Nix/3Cox/3]O2 cathode series (0 < x < 1) synthesized by sucrose combustion process for high capacity lithium ion batteries
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DOI：
10.1016/j.materresbull.2008.01.011
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发表时间：
2008-12
影响因子：
5.4
通讯作者：
G. Kim;Seung-Beob Yi;Y. Park;Ho Gi Kim
中科院分区：
文献类型：
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作者：
G. Kim;Seung-Beob Yi;Y. Park;Ho Gi Kim
介绍了一种高容量锂二次电池正极材料Li 2 MnO 3和Li[Mn 1/3 Ni 1/3Co 1/3] O2的混合正极材料。它是使用蔗糖燃烧过程制备的，因为这是一个简单的过程。通过XANES测量，原始Li[Li（1−x）/3 Mn（2−x）/3 Nix/3Cox/3] O2化合物中Mn、Co和Ni离子的氧化态分别被证实为四价、三价和二价。电化学充放电研究表明，当x=0.5时，在0.2C倍率下首次放电容量最高，为224 mAh/g。Li[Li 1/6 Mn 1/2Ni 1/6Co 1/6] O2中的Co和Ni离子的氧化态向更高的氧化态转变，但Mn离子的氧化态没有改变。
A mixed cathode material between Li2MnO3and Li[Mn1/3Ni1/3Co1/3]O2for high capacity lithium secondary batteries was introduced in this study. It was prepared using the sucrose combustion process because this is a simple process. The oxidation states of Mn, Co and Ni ions in the pristine Li[Li(1−x)/3Mn(2−x)/3Nix/3Cox/3]O2compounds were confirmed to be tetravalent, trivalent and divalent, respectively, via XANES measurements. Electrochemical charge/discharge studies showed that the highest first discharge capacity of 224mAh/g was obtained in composition of x=0.5 at a 0.2C rate. The oxidation state of the Co and Ni ions in the Li[Li1/6Mn1/2Ni1/6Co1/6]O2changed to higher oxidation states, but that of the Mn ions did not change.