Molybdenum disulfide (MoS₂) has been recognized as a promising anode material for high‐energy Li‐ion (LIBs) and Na‐ion batteries (SIBs) due to its apparently high capacity and intriguing 2D‐layered structure. The low conductivity, unsatisfied mechanical stability, and limited active material utilization are three key challenges associated with MoS₂ electrodes especially at high current rates and mass active material loading. Here, vertical MoS₂ nanosheets are controllably patterned onto electrochemically exfoliated graphene (EG). Within the achieved hierarchical architecture, the intimate contact between EG and MoS₂ nanosheets, interconnected network, and effective exposure of active materials by vertical channels simultaneously overcomes the above three problems, enabling high mechanical integrity and fast charge transport kinetics. Serving as anode material for LIBs, EG‐MoS₂ with 95 wt% MoS₂ content delivered an ultrahigh‐specific capacity of 1250 mA h g⁻¹ after 150 stable cycles at 1 A g⁻¹, which is among the highest values in all reported MoS₂ electrodes, and excellent rate performance (970 mA h g⁻¹ at 5 A g⁻¹). Moreover, impressive cycling stability (509 mA h g⁻¹ at 1 A g⁻¹ after 250 cycles) and rate capability (423 mA h g⁻¹ at 2 A g⁻¹) were also achieved for SIBs. The area capacities reached 1.27 and 0.49 mA h cm⁻² at ≈1 mA cm⁻² for LIBs and SIBs, respectively. This work may inspire the development of new 2D hierarchical structures for high efficiency energy storage and conversion.

中文翻译：

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在电化学剥离石墨烯上构图的垂直排列MoS2纳米片，用于高性能锂和钠存储

二硫化钼（MoS ₂）由于具有明显的高容量和引人入胜的2D层结构，因此被公认为是高能锂离子（LIB）和钠离子电池（SIB）的有希望的阳极材料。低导电性，不令人满意的机械稳定性和有限的活性材料利用率是与MoS ₂电极相关的三个关键挑战，特别是在高电流速率和大量活性材料负载下。在这里，垂直MoS ₂纳米片可控地图案化到电化学剥落的石墨烯（EG）上。在已实现的分层架构中，EG和MoS ₂之间的紧密联系纳米片，相互连接的网络以及垂直通道对活性物质的有效暴露同时克服了上述三个问题，从而实现了很高的机械完整性和快速的电荷传输动力学。作为LIB的阳极材料，MoS ₂含量为95 wt％的EG-MoS ₂在1 A g ^-1下经过150次稳定循环后提供了1250 mA hg ^-1的超高比容量，在所有报告的数值中都最高的MoS _2个电极，和优异的倍率性能（970毫安汞柱^-1在5 A G ^-1）。此外，令人印象深刻的循环稳定性（509毫安汞柱^-1 1 A G ^-1250次循环）和倍率性能（423毫安汞柱之后^-1以2A克^-1）也实现了的SIB。对于LIB和SIB，在≈1mA cm ^-2时，面积容量分别达到1.27和0.49 mA h cm ^-2。这项工作可能会激发新的2D层次结构的开发，以实现高效的能量存储和转换。