Layered cathode materials Li[NixLi(1/3-2x/3)Mn(2/3-x/3)]O2 for lithium-ion batteries

Layered cathode materials Li[NixLi(1/3-2x/3)Mn(2/3-x/3)]O2 for lithium-ion batteries
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DOI:
10.1149/1.1407994
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发表时间:
2001-11-01
影响因子:
--
通讯作者:
Dahn, JR
Dahn, JR
中科院分区:
其他
文献类型:
--
作者:
Lu, ZH;MacNeil, DD;Dahn, JR

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首次报道了x = 1/3、5/12和1/2的层状Li[NixLi(1/3-2x/3)Mn(2/3-x/3)O2的结构、合成和电化学行为,Li[NixLi(1/3-2x/3)Mn(2/3-x/3)]O-2由Li2MnO3或Li[Li1/3Mn2/3]O-2衍生而来用 Ni2+ 取代 Li+ 和 Mn4+,同时保持所有剩余的 Mn 原子处于 4(+) 氧化态。 x = 5/12 的 Li[NixLi(1/3-2x/3)Mn(2/3-x/3)O-2 可以在 30 和 55℃、3.0 和 4.4 V 之间、使用 30 mA/g 的电流密度分别提供 150 和 160 mAh/g 的稳定容量。在Li[NixLi(1/3-2x/3)Mn(2/3-x/3)]O-2带电电极上进行的差示扫描量热实验(x = 5/12)表明该材料应该比LiCoO2更安全。 x = 1/3、5/12 和 1/2 的 Li[NixLi(1/3-2x/3)Mn(2/3-x/3)]O-2 可以在 2.0 和 4.6 V 之间循环,在 30 摄氏度下分别给出约 200、180 和 160 mAh/g 的容量。 x = 1/3 的 Li[NixLi(1/3-2x/3)Mn(2/3-x/3)]O-2 在 55℃、2.0 至 4.6 V 之间、电流密度为 30 mA/g 时容量为 220 mAh/g。 (C) 2001 年电化学协会。
The structure, synthesis, and electrochemical behavior of layered Li[NixLi(1/3-2x/3)Mn(2/3-x/3)O2 for x = 1/3, 5/12, and 1/2 are reported for the first time, Li[NixLi(1/3-2x/3)Mn(2/3-x/3)]O-2 is derived from Li2MnO3 or Li[Li1/3Mn2/3]O-2 by substitution of Li+ and Mn4+ by Ni2+ while maintaining all the remaining Mn atoms in the 4(+) oxidation state. Li[NixLi(1/3-2x/3)Mn(2/3-x/3)O-2 with x = 5/12 can deliver steady capacities of 150 and 160 mAh/g at 30 and 55 degreesC, respectively, between 3.0 and 4.4 V using a current density of 30 mA/g. Differential scanning calorimetry experiments on charged electrodes of Li[NixLi(1/3-2x/3)Mn(2/3-x/3)]O-2 for x = 5/12 indicate that this material should be safer than LiCoO2. Li[NixLi(1/3-2x/3)Mn(2/3-x/3)]O-2 with x = 1/3, 5/12, and 1/2 can be cycled between 2.0 and 4.6 V to give capacities of about 200, 180, and 160 mAh/g, respectively, at 30 degreesC. Li[NixLi(1/3-2x/3)Mn(2/3-x/3)]O-2 with x = 1/3 gives a capacity of 220 mAh/g at 55 degreesC between 2.0 and 4.6 V using a current density of 30 mA/g. (C) 2001 The Electrochemical Society.