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Two-Dimensional Vanadium Carbide (MXene) as a High-Capacity Cathode Material for Rechargeable Aluminum Batteries
ACS Nano ( IF 15.8 ) Pub Date : 2017-10-27 00:00:00 , DOI: 10.1021/acsnano.7b05350 Armin VahidMohammadi 1 , Ali Hadjikhani , Sina Shahbazmohamadi , Majid Beidaghi 1
ACS Nano ( IF 15.8 ) Pub Date : 2017-10-27 00:00:00 , DOI: 10.1021/acsnano.7b05350 Armin VahidMohammadi 1 , Ali Hadjikhani , Sina Shahbazmohamadi , Majid Beidaghi 1
Affiliation
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Rechargeable aluminum batteries (Al batteries) can potentially be safer, cheaper, and deliver higher energy densities than those of commercial Li-ion batteries (LIBs). However, due to the very high charge density of Al3+ cations and their strong interactions with the host lattice, very few cathode materials are known to be able to reversibly intercalate these ions. Herein, a rechargeable Al battery based on a two-dimensional (2D) vanadium carbide (V2CTx) MXene cathode is reported. The reversible intercalation of Al3+ cations between the MXene layers is suggested to be the mechanism for charge storage. It was found that the electrochemical performance could be significantly improved by converting multilayered V2CTx particles to few-layer sheets. With specific capacities of more than 300 mAh g–1 at high discharge rates and relatively high discharge potentials, V2CTx MXene electrodes show one of the best performances among the reported cathode materials for Al batteries. This study can lead to foundations for the development of high-capacity and high energy density rechargeable Al batteries by showcasing the potential of a large family of intercalation-type cathode materials based on MXenes.
中文翻译：
二维碳化钒（MXene）作为可充电铝电池的高容量阴极材料
与商用锂离子电池（LIB）相比，可充电铝电池（Al电池）可能更安全，更便宜并且提供更高的能量密度。但是，由于Al 3+阳离子的电荷密度很高，并且它们与主体晶格的相互作用强，因此很少有阴极材料能够可逆地嵌入这些离子。本文中，报道了基于二维（2D）碳化钒（V 2 CT x）MXene阴极的可再充电Al电池。MXene层之间可逆插入Al 3+阳离子被认为是电荷存储的机制。发现通过转化多层的V 2可以显着改善电化学性能。CT x颗粒形成几层薄板。V 2 CT x MXene电极在高放电速率和相对较高的放电电势下具有超过300 mAh g –1的比容量，在报道的用于铝电池的阴极材料中显示出最佳性能之一。这项研究通过展示基于MXene的大量插层型正极材料的潜力，可以为开发高容量和高能量密度的可充电Al电池奠定基础。
更新日期：2017-10-28
中文翻译：
二维碳化钒（MXene）作为可充电铝电池的高容量阴极材料
与商用锂离子电池（LIB）相比，可充电铝电池（Al电池）可能更安全，更便宜并且提供更高的能量密度。但是，由于Al 3+阳离子的电荷密度很高，并且它们与主体晶格的相互作用强，因此很少有阴极材料能够可逆地嵌入这些离子。本文中，报道了基于二维（2D）碳化钒（V 2 CT x）MXene阴极的可再充电Al电池。MXene层之间可逆插入Al 3+阳离子被认为是电荷存储的机制。发现通过转化多层的V 2可以显着改善电化学性能。CT x颗粒形成几层薄板。V 2 CT x MXene电极在高放电速率和相对较高的放电电势下具有超过300 mAh g –1的比容量，在报道的用于铝电池的阴极材料中显示出最佳性能之一。这项研究通过展示基于MXene的大量插层型正极材料的潜力，可以为开发高容量和高能量密度的可充电Al电池奠定基础。
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