Engineering of high-performance potassium-ion capacitors using polyaniline-derived N-doped carbon nanotubes anode and laser scribed graphene oxide cathode
Engineering of high-performance potassium-ion capacitors using polyaniline-derived N-doped carbon nanotubes anode and laser scribed graphene oxide cathode
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DOI：
10.1016/j.apmt.2019.07.003
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发表时间：
2019-09
影响因子：
8.3
通讯作者：
Mahmoud Moussa;S. Al‐Bataineh;D. Losic;D. Dubal
中科院分区：
文献类型：
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作者：
Mahmoud Moussa;S. Al‐Bataineh;D. Losic;D. Dubal
与锂相比，钾(K)离子存储技术由于其低成本和地球上巨大的丰度而受到极大的关注。然而，该技术仍处于科学研究阶段，探索合适的电极材料是一个关键挑战。在此，我们通过热解聚苯胺纳米管(PANI-NTS)，将氮掺杂碳纳米管(N-CNTs)作为一种有前途的K-离子存储的负极材料。这些N-碳纳米管具有高可逆容量、良好的倍率性能和循环稳定性。利用这些特点，以碳纳米管为电池正极，三维激光划片石墨烯(LSG)为正极，构建了一种钾离子混合电容器。该装置表现出65瓦时/公斤的高能量密度，1000瓦/公斤的高功率输出，以及长循环寿命(5000次循环保持91%的容量)。因此，这种先进的储能系统可以低成本地同时满足不同应用对高功率和高能量密度的要求。
Potassium (K) ion storage technology is recently receiving a great attention due to their low-cost and enormous abundance on the earth compared to lithium. However, the technology is still at a scientific research stage and exploring suitable electrode materials is a key challenge. Herein, we have engineered nitrogen doped carbon nanotubes (N-CNTs) as a promising anode material for K-ion storage through pyrolytic decomposition of polyaniline nanotubes (PAni-NTs). These N-CNTs delivers high reversible capacity with good rate performance and cycling stability. Taking advantage of these features, a potassium-ion hybrid capacitor (KIHC) is constructed using N-CNTs as battery-type anode and 3-dimensional (3D) laser scribed graphene (LSG) as capacitor-type cathode electrodes. The device displays a high energy density of 65 W h/kg, a high power output of 1000 W/kg, as well as a long cycling life (91% capacity retention over 5000 cycles). Thus, such an advanced energy storage system can satisfy the requirements of high power and high energy densities simultaneously in diverse applications at low-cost.