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首页> 外文期刊>Chemistry: A European journal >Sodium-Ion Storage Properties of FeS-Reduced Graphene Oxide Composite Powder with a Crumpled Structure
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Sodium-Ion Storage Properties of FeS-Reduced Graphene Oxide Composite Powder with a Crumpled Structure

机译：FeS还原的皱纹氧化石墨烯复合粉的钠离子存储性能

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摘要

The sodium-ion storage properties of FeS-reduced graphene oxide (rGO) and Fe3O4-rGO composite powders with crumpled structures have been studied. The Fe3O4-rGO composite powder, prepared by one-pot spray pyrolysis, could be transformed to an FeS-rGO composite powder through a simple sulfidation treatment. The mean size of the Fe3O4 nanocrystals in the Fe3O4-rGO composite powder was 4.4nm. After sulfidation, FeS nanocrystals of size several hundred nanometers were confined within the crumpled structure of the rGO matrix. The initial discharge capacities of the FeS-rGO and Fe3O4-rGO composite powders were 740 and 442mAhg(-1), and their initial charge capacities were 530 and 165mAhg(-1), respectively. The discharge capacities of the FeS-rGO and Fe3O4-rGO composite powders at the 50th cycle were 547 and 150mAhg(-1), respectively. The FeS-rGO composite powder showed superior sodium-ion storage performance compared to the Fe3O4-rGO composite powder.
机译：研究了FeS还原的氧化石墨烯（rGO）和Fe3O4-rGO复合粉末的皱纹结构的钠离子存储性能。通过一锅法喷雾热解法制备的Fe3O4-rGO复合粉末可通过简单的硫化处理转化为FeS-rGO复合粉末。 Fe3O4-rGO复合粉末中Fe3O4纳米晶体的平均尺寸为4.4nm。硫化后，大小为数百纳米的FeS纳米晶体被限制在rGO基质的皱缩结构内。 FeS-rGO和Fe3O4-rGO复合粉末的初始放电容量分别为740和442mAhg（-1），其初始充电容量分别为530和165mAhg（-1）。 FeS-rGO和Fe3O4-rGO复合粉末在第50次循环时的放电容量分别为547和150mAhg（-1）。与Fe3O4-rGO复合粉末相比，FeS-rGO复合粉末显示出优异的钠离子存储性能。

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