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由无序类石墨烯层组成的 MoS₂ 纳米片,可用作高速率锂电池的阳极材料。

MoS₂ nanoplates consisting of disordered graphene-like layers for high rate lithium battery anode materials.

机构信息

Interdisciplinary School of Green Energy, Ulsan National Institute of Science and Technology (UNIST), Ulsan 689-798, Korea.

出版信息

Nano Lett. 2011 Nov 9;11(11):4826-30. doi: 10.1021/nl202675f. Epub 2011 Oct 5.

Abstract

MoS(2) nanoplates, consisting of disordered graphene-like layers, with a thickness of ∼30 nm were prepared by a simple, scalable, one-pot reaction using Mo(CO)(6) and S in an autoclave. The product has a interlayer distance of 0.69 nm, which is much larger than its bulk counterpart (0.62 nm). This expanded interlater distance and disordered graphene-like morphology led to an excellent rate capability even at a 50C (53.1 A/g) rate, showing a reversible capacity of 700 mAh/g. In addition, a full cell (LiCoO(2)/MoS(2)) test result also demonstrates excellent capacity retention up to 60 cycles.

摘要

MoS2 纳米板由厚度约为 30nm 的无序类石墨烯层组成,采用 Mo(CO)(6)和 S 在高压釜中进行简单、可扩展、一锅法反应制备而成。该产物的层间距离为 0.69nm,远大于其体相(0.62nm)。这种扩大的层间距离和无序的类石墨烯形态导致了即使在 50C(53.1A/g)的速率下也具有优异的倍率性能,显示出 700mAh/g 的可逆容量。此外,全电池(LiCoO2/MoS2)测试结果也表明,在 60 个循环中具有出色的容量保持率。

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