Flexible lithium-oxygen battery based on a recoverable cathode.
Flexible lithium-oxygen battery based on a recoverable cathode.
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基于可恢复阴极的柔性锂氧电池
DOI：
10.1038/ncomms8892
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发表时间：
2015-08-03
影响因子：
16.6
通讯作者：
Zhang XB
中科院分区：
文献类型：
--
作者：
Liu QC;Xu JJ;Xu D;Zhang XB
尽管柔性电源是实现下一代柔性电子学的关键，但它们的理论能量密度较低，阻碍了它们在此类器件中的应用。可充电锂氧电池(Li-O2)可以提供极高的比能量，而传统的Li-O2电池体积大、不灵活，受缺乏有效成分和可调电池配置的限制。在这里，我们展示了利用生长在碳纤维(NAS/CT)上的独特的二氧化钛纳米线阵列作为独立的正极，可以制备出柔性的Li-O2电池，并且即使在严格的弯曲和扭转条件下也可以获得优异的电化学性能。此外，TiO2NAS/CT正极材料具有良好的可回收率，显著延长了锂离子电池的循环寿命，降低了电池的生命周期成本。灵活的储能系统通常具有有限的能量密度。本文报道了一种柔性锂氧电池，其阴极由生长在碳织物上的二氧化钛纳米线阵列组成，具有高的机械强度和良好的电化学性能。
Although flexible power sources are crucial for the realization next-generation flexible electronics, their application in such devices is hindered by their low theoretical energy density. Rechargeable lithium–oxygen (Li–O2) batteries can provide extremely high specific energies, while the conventional Li–O2 battery is bulky, inflexible and limited by the absence of effective components and an adjustable cell configuration. Here we show that a flexible Li–O2 battery can be fabricated using unique TiO2 nanowire arrays grown onto carbon textiles (NAs/CT) as a free-standing cathode and that superior electrochemical performances can be obtained even under stringent bending and twisting conditions. Furthermore, the TiO2 NAs/CT cathode features excellent recoverability, which significantly extends the cycle life of the Li–O2 battery and lowers its life cycle cost. Flexible energy storage systems usually have limited energy densities. Here the authors report a flexible lithium–oxygen battery with the cathode consisting of titanium dioxide nanowire arrays grown on carbon textiles, which displays high mechanical strength as well as promising electrochemical performance.