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Bilayered nanoporous graphene/molybdenum oxide for high rate lithium ion batteries
Nano Energy ( IF 17.6 ) Pub Date : 2018-01-04 , DOI: 10.1016/j.nanoen.2018.01.006
Jiuhui Han , Pan Liu , Yoshikazu Ito , Xianwei Guo , Akihiko Hirata , Takeshi Fujita , Mingwei Chen

Developing advanced lithium-ion batteries that afford both high energy density and high power density has been one of the crucial research targets in the field of electrochemical energy storage. Realization of fast Li+ storage would require a smart electrode design that enables simultaneous enhancements in ion and electron transports as well as a fast and facile bulk-form solid-state reaction. Here we report a high-performance 3D bilayered composite electrode constructed by bicontinuous nanoporous graphene and thin molybdenum oxide stacking films. The novel electrode offers fast kinetics of Li+ diffusion and reactions and, consequently, delivers a large specific capacity of 710 mAh g-1, the excellent rate performance of charging within seconds and an ultra-long lifetime over 13,000 discharge-charge cycles. High and stable volumetric capacities up to 900 mAh cm-3 have also been achieved with the squeezed composite electrodes. This study shines light into the realization of a high-performance graphene-based porous electrode for advanced lithium-ion batteries and will inspire the development of new 3D hybrid materials for high-rate and large-capacity electrochemical energy storage.



中文翻译:

双层纳米多孔石墨烯/氧化钼,用于高速率锂离子电池

开发提供高能量密度和高功率密度的高级锂离子电池已经成为电化学能量存储领域中的关键研究目标之一。要实现快速的Li +储存,就需要一种智能的电极设计,该电极设计能够同时增强离子和电子的传输以及快速便捷的本体形式的固态反应。在这里,我们报告了由双连续纳米多孔石墨烯和氧化钼薄堆叠膜构成的高性能3D双层复合电极。新型电极可提供快速的Li +扩散和反应动力学,因此可提供710 mAh g -1的大比容量,可在几秒钟内实现出色的充电速率性能,并在13,000个放电-充电周期中具有超长寿命。挤压的复合电极还实现了高达900 mAh cm -3的高而稳定的容量。这项研究为实现用于高级锂离子电池的高性能石墨烯基多孔电极的实现提供了启示,并将激发开发用于高速率和大容量电化学储能的新型3D混合材料。

更新日期:2018-01-04
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