B4C nanoskeleton enabled, flexible lithium-sulfur batteries
B4C nanoskeleton enabled, flexible lithium-sulfur batteries
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DOI：
10.1016/j.nanoen.2019.01.018
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发表时间：
2019-04
期刊：
影响因子：
17.6
通讯作者：
Ningning Song;Zan Gao;Yunya Zhang;Xiaodong Li
中科院分区：
文献类型：
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作者：
Ningning Song;Zan Gao;Yunya Zhang;Xiaodong Li
合理选择主体材料和合理设计电极是构建高性能储能器件的关键。在这里，我们报告了一种不寻常的锂硫（Li-S）电池阴极配置，采用B4 C纳米线（BC-NWs）作为骨架，多孔活性棉织物（ACT）作为柔性碳支架，还原氧化石墨烯（rGO）作为自适应保护壳。该BC-NWs@ACT/S/rGO阴极实现了最佳的硫约束和电化学性能，具有优异的循环稳定性（在1.5 mA/cm 2的高电流密度下超过1000次循环），超低容量衰减率（每循环0.056%）和在0.1至1.5mA/cm 2的宽放电速率范围内的显著容量，证明了其在Li-S电池中同时实现高容量和长循环寿命的潜力。
Wise selection of host materials and judicious design of electrodes are critical for constructing high-performance energy storage devices. Here we report an unusual cathode configuration for lithium-sulfur (Li-S) batteries employing B4C nanowires (BC-NWs) as a skeleton, porous activated cotton textile (ACT) as a flexible carbon scaffold, and reduced graphene oxide (rGO) as a self-adaptive protective shell. This BC-NWs@ACT/S/rGO cathode achieved superlative sulfur confinement and electrochemical performance with excellent cycling stability (over 1000 cycles at a high current density of 1.5 mA/cm2), an ultralow capacity decay rate (0.056% per cycle) and remarkable capacities at a wide range of discharging rate from 0.1 to 1.5 mA/cm2, demonstrating its potential to achieve high capacity and long cycle life simultaneously in Li-S batteries.