On-site chemical pre-lithiation of S cathode at room temperature on a 3D nano-structured current collector
On-site chemical pre-lithiation of S cathode at room temperature on a 3D nano-structured current collector
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DOI：
10.1016/j.jpowsour.2017.08.113
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发表时间：
2017-10
影响因子：
9.2
通讯作者：
Yunwen Wu;T. Momma;Seongki Ahn;T. Yokoshima;H. Nara;T. Osaka
中科院分区：
文献类型：
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作者：
Yunwen Wu;T. Momma;Seongki Ahn;T. Yokoshima;H. Nara;T. Osaka
报道了一种新的化学预锂法制备硫化锂(Li2S)正极材料。这种预锂化过程只需将有机锂试剂萘化锂(Li+naph−)滴在所制备的硫磺阴极上即可。首次实现了由三维纳米碳纳米管(CNT)集电体实现的室温化学预石化反应。结果表明，与高温预锂法制备的Li2S阴极相比，室温下制备的Li2S阴极具有更高的容量和更低的磁滞回线。预锂化Li_2S正极在室温下表现出稳定的循环性能，在0.1C倍率下循环100次后容量为600mAhg−1，在2C倍率下循环容量为500mAhg−1。这种简单的常温现场预锂方法适用于无锂金属电池的现场预锂。
This work reports a new chemical pre-lithiation method to fabricate lithium sulfide (Li2S) cathode. This pre-lithiation process is taken place simply by dropping the organolithium reagent lithium naphthalenide (Li+Naph−) on the prepared sulfur cathode. It is the first time realizing the room temperature chemical pre-lithaition reaction attributed by the 3D nanostructured carbon nanotube (CNT) current collector. It is confirmed that the Li2S cathode fabricated at room temperature showing higher capacity and lower hysteresis than the Li2S cathode fabricated at high temperature pre-lithiation. The pre-lithiated Li2S cathode at room temperature shows stable cycling performance with a 600 mAh g−1capacity after 100 cycles at 0.1 C-rate and high capacity of 500 mAh g−1at 2 C-rate. This simple on-site pre-lithiation method at room temperature is demonstrated to be applicable for the in-situ pre-lithiation in a Li metal free battery.