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首页> 外文期刊>Electrochimica Acta >High-performance flexible hybrid supercapacitor based on NiAl layered double hydroxide as a positive electrode and nitrogen-doped reduced graphene oxide as a negative electrode
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High-performance flexible hybrid supercapacitor based on NiAl layered double hydroxide as a positive electrode and nitrogen-doped reduced graphene oxide as a negative electrode

机译：基于Nial层状双氢氧化物的高性能柔性混合超级电容器作为正极和氮气掺杂的氧化石墨烯作为负电极

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Herein, we investigated the influence of Fe, Cr and Al incorporation in Ni-based layered double hydroxides (LDHs) supported on nickel foam (NF) electrodes, prepared through a one-step hydrothermal, on their electrochemical performance. The resulting NiFe, NiCr and NiAl (LDHs) were further coated on carbon spheres (CS) supported on NF using a facile two-step hydrothermal process to produce NiFe LDHs@CS/NF, NiCr LDHs@CS/NF and NiAl LDHs@CS/NF. The performance of the prepared materials as binder-free electrodes in supercapacitors was assessed. Among all the prepared electrodes, NiAI LDHs@CS/NF electrode material achieved the largest areal capacity (1042.2 mC cm(-2) at 1 mA cm(-2)), as compared to the areal capacity values attained by NiFe LDHs@CS/NF (705.8 mC cm(-2)) and NiCr LDHs@CS/NF (814.9 mC cm(-2)) at 1 mA cm(-2) . Therefore, a hybrid supercapacitor device comprising NiAI LDHs@CS/NF as the positive electrode and N-doped reduced graphene/NF as the negative electrode was successfully fabricated. The device exhibited favorable flexibility, good mechanical properties and stability; the areal capacity remained similar to 75% and similar to 67% of the original value after 5000 and 10,000 cycles, respectively. The hybrid supercapacitor attained an energy density of 43 mu Wh cm(-2) at a power density of 0.805 mW cm(-2) and was applied successfully to operate a home-made windmill device continuously for 32 s. Moreover, two flexible NiAI LDHs@CS/NF//N-rGO/NF hybrid supercapacitors, connected in series, were able to light up a green, a red and a yellow LED in parallel, lasting for 37 s, 542 s and 199 s, respectively, indicating their potential application for flexible energy storage devices. (C) 2020 Elsevier Ltd. All rights reserved.
机译：在此，我们研究了通过一步水热量的镍泡沫（NF）电极支持的Ni基层双氢氧化物（LDH）对其电化学性能的影响，研究了Fe，Cr和Al掺入的影响。使用舒适的两步水热法在NF上支持的碳球体（Cs）上进一步涂覆所得到的NiFe，NiCr和Nial（LDH），以生产NiFeLDHS @ CS / NF，NiCR LDHS @ CS / NF和Nial LD​​HS @ CS / NF。评估制备的材料作为超级电容器中的无粘合剂电极的性能。在所有制备的电极中，与NIFE LDHS @ CS达到的面积容量值相比，NIAI LDHS @ CS / NF电极材料在1mA cm（-2））上实现了最大的面积容量（1042.2mc cm（-2）） / NF（705.8MC cm（-2））和NICR LDHS @ CS / NF（814.9mc cm（-2）），1 mA cm（-2）。因此，成功地制造了包含作为正极和N掺杂的石墨烯/ NF的NIAI LDHS @ CS / NF的杂交超级电容器装置。该器件具有良好的灵活性，良好的机械性能和稳定性;由于5000和10,000个循环分别在5000和10,000次循环后，所以容量仍然与75％相似，类似于原始值的67％。混合超级电容器以0.805mM厘米（-2）的功率密度，达到43μm（-2）的能量密度，并成功应用以连续地操作自制风车装置32秒。此外，两个灵活的NIAI LDHS @ CS / NF // N-RGO / NF混合超级电容器，串联连接，能够并行地点亮绿色，红色和黄色LED，持续37秒，542岁及199 S分别表示它们对柔性能量存储装置的潜在应用。 （c）2020 elestvier有限公司保留所有权利。

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