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Two-Dimensional Water-Coupled Metallic MoS2 with Nanochannels for Ultrafast Supercapacitors
Nano Letters ( IF 9.6 ) Pub Date : 2017-02-02 00:00:00 , DOI: 10.1021/acs.nanolett.6b05134 Xiumei Geng 1 , Yelong Zhang 1 , Yang Han 1 , Jingxiao Li 1 , Lei Yang 1 , Mourad Benamara 2 , Liao Chen 1 , Hongli Zhu 1
Nano Letters ( IF 9.6 ) Pub Date : 2017-02-02 00:00:00 , DOI: 10.1021/acs.nanolett.6b05134 Xiumei Geng 1 , Yelong Zhang 1 , Yang Han 1 , Jingxiao Li 1 , Lei Yang 1 , Mourad Benamara 2 , Liao Chen 1 , Hongli Zhu 1
Affiliation
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MoS2 is a promising electrode material for energy storage. However, the intrinsic multilayer pure metallic MoS2 (M-MoS2) has not been investigated for use in supercapacitors. Here, an ultrafast rate supercapacitor with extraordinary capacitance using a multilayer M-MoS2–H2O system is first investigated. Intrinsic M-MoS2 with a monolayer of water molecules covering both sides of nanosheets is obtained through a hydrothermal method with water as solvent. The super electrical conductivity of the as-prepared pure M-MoS2 is beneficial to electron transport for high power supercapacitor. Meanwhile, nanochannels between the layers of M-MoS2–H2O with a distance of ∼1.18 nm are favorable for increasing the specific space for ion diffusion and enlarging the surface area for ion adsorption. By virtue of this, M-MoS2–H2O reaches a high capacitance of 380 F/g at a scan rate of 5 mV/s and still maintains 105 F/g at scan rate of 10 V/s. Furthermore, the specific capacitance of the symmetric supercapacitor based on M-MoS2–H2O electrodes retain a value as high as 249 F/g under 50 mV/s. These findings suggest that multilayered M-MoS2–H2O system with ion accessible large nanochannels and efficient charge transport provide an efficient energy storage strategy for ultrafast supercapacitors.
中文翻译：
具有纳米通道的二维水耦合金属MoS 2，用于超快超级电容器
MoS 2是用于能量存储的有前途的电极材料。但是，尚未研究将本征多层纯金属MoS 2（M-MoS 2）用于超级电容器。在这里，首先研究了使用多层M-MoS 2 -H 2 O系统的具有非凡电容的超快速率超级电容器。通过以水为溶剂的水热法获得具有单层水分子覆盖纳米片两面的本征M-MoS 2。所制备的纯M-MoS 2的超导电性有利于大功率超级电容器的电子传输。同时，M-MoS 2层之间的纳米通道距离约为1.18 nm的–H 2 O有利于增加离子扩散的比空间和扩大离子吸附的表面积。因此，M-MoS 2 -H 2 O在5 mV / s的扫描速率下达到380 F / g的高电容，而在10 V / s的扫描速率下仍保持105 F / g。此外，基于M-MoS 2 -H 2 O电极的对称超级电容器的比电容在50 mV / s下保持高达249 F / g的值。这些发现表明，具有离子可访问大型纳米通道和高效电荷传输功能的多层M-MoS 2 -H 2 O系统为超快超级电容器提供了有效的能量存储策略。
更新日期：2017-02-02
中文翻译：
具有纳米通道的二维水耦合金属MoS 2，用于超快超级电容器
MoS 2是用于能量存储的有前途的电极材料。但是，尚未研究将本征多层纯金属MoS 2（M-MoS 2）用于超级电容器。在这里，首先研究了使用多层M-MoS 2 -H 2 O系统的具有非凡电容的超快速率超级电容器。通过以水为溶剂的水热法获得具有单层水分子覆盖纳米片两面的本征M-MoS 2。所制备的纯M-MoS 2的超导电性有利于大功率超级电容器的电子传输。同时，M-MoS 2层之间的纳米通道距离约为1.18 nm的–H 2 O有利于增加离子扩散的比空间和扩大离子吸附的表面积。因此，M-MoS 2 -H 2 O在5 mV / s的扫描速率下达到380 F / g的高电容，而在10 V / s的扫描速率下仍保持105 F / g。此外，基于M-MoS 2 -H 2 O电极的对称超级电容器的比电容在50 mV / s下保持高达249 F / g的值。这些发现表明，具有离子可访问大型纳米通道和高效电荷传输功能的多层M-MoS 2 -H 2 O系统为超快超级电容器提供了有效的能量存储策略。
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