Vertically aligned ultrathin MoS2 nanosheets grown on graphene-wrapped hollow carbon microtubes derived from loofah sponge as advanced anodes for highly reversible lithium storage
Vertically aligned ultrathin MoS2 nanosheets grown on graphene-wrapped hollow carbon microtubes derived from loofah sponge as advanced anodes for highly reversible lithium storage
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在源自丝瓜络的石墨烯包裹的中空碳微管上生长的垂直排列超薄 MoS2 纳米片，作为高度可逆锂存储的高级阳极
DOI：
10.1016/j.electacta.2018.11.148
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发表时间：
2019-02-10
影响因子：
6.6
通讯作者：
Luo, Yongsong
中科院分区：
文献类型：
--
作者：
Guo, Yan;Zhang, Yingge;Luo, Yongsong
使用低成本、环保且可持续的生物质是制备锂离子电池碳基复合材料的独特方法。在我们的研究中，空心，衍生微管（HMD）的石墨烯/丝瓜络海绵制造。每个微管都包裹有石墨烯，从而提高了导电性，并促进了超薄MoS 2纳米片的容易控制的生长。该方法采用将HMD浸泡在氧化石墨烯（GO）分散液中，随后碳化和活化HMD/rGO的简单过程。通过水热法在HMD/rGO表面垂直均匀地生长了层状MoS 2纳米片，得到了HMD/ rGO/MoS 2复合材料，在0.2 A g（-1）的电流密度下，200次循环后，其可逆储锂容量为838.2 mAh g（-1）。这种优异的电化学性能可能是由于HMD/rGO的高导电性、HMD/rGO与MoS 2纳米片之间的协同效应、合理的结构设计以及MoS 2的高理论比容量。这种结构不仅提供了一种新型的，高质量的碳模板/基质，而且还提供了一种新的方式来设计可持续的电极用于电化学能量存储，并使经济的，多功能的，碳基混合物可用于其他应用。(C)2018爱思唯尔有限公司版权所有
Using low cost, environment-friendly, and sustainable biomass is a unique approach to the preparation carbon-based composites for lithium ion batteries. In our research, hollow, derived microtubes (HMD) were fabricated from graphene/loofah sponge. Each microtube was wrapped with graphene, resulting in conductivity improvement, and facilitated easily controlled growth of ultra-thin MoS2 nanosheets. The method employed a simple process of soaking the HMD in graphene oxide (GO) dispersion liquid, and subsequent carbonization and activation of the HMD/rGO. When ultrathin MoS2 nanosheets were vertically and uniformly grown on the surface of the HMD/rGO, via the hydrothermal method, the HMD/ rGO/MoS2 composite was obtained, and exhibited reversible lithium storage capacity of 838.2 mAh g(-1) at a current density of 0.2 A g(-1) after 200 cycles. This excellent electrochemical performance could be due to the high conductivity of HMD/rGO, a synergistic effect between HMD/rGO and MoS2 nanosheets, a reasonable structural design, and the high theoretical specific capacity of MoS2. Such a structure not only provides a novel, high-quality carbon template/matrix from cheap loofah sponge, but also provides a new way to design sustainable electrodes for electrochemical energy storage, and makes economical, multifunctional, carbon-based hybrids available for other applications. (C) 2018 Elsevier Ltd. All rights reserved.