Tailoring the morphology followed by the electrochemical performance of NiMn-LDH nanosheet arrays through controlled Co-doping for high-energy and power asymmetric supercapacitors,Dalton Transactions

当前位置： X-MOL 学术 › Dalton Trans. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Tailoring the morphology followed by the electrochemical performance of NiMn-LDH nanosheet arrays through controlled Co-doping for high-energy and power asymmetric supercapacitors
Dalton Transactions ( IF 3.5 ) Pub Date : 2017-09-01 00:00:00 , DOI: 10.1039/c7dt01863k
Saurabh Singh _{1,

2,

3,

4,

5} , Nanasaheb M. Shinde _{1,

2,

3,

4,

5} , Qi Xun Xia _{1,

2,

3,

4,

5} , Chandu V. V. M. Gopi _{2,

3,

4,

6} , Je Moon Yun _{1,

2,

3,

4,

5} , Rajaram S. Mane _{7,

8,

9,

10} , Kwang Ho Kim _{1,

2,

3,

4,

5}

Affiliation

Herein, we tailor the surface morphology of nickel–manganese-layered double hydroxide (NiMn-LDH) nanostructures on 3D nickel-foam via a step-wise cobalt (Co)-doping hydrothermal chemical process. At the 10% optimum level of Co-doping, we noticed a thriving tuned morphological pattern of NiMn-LDH nanostructures (NiCoMn-LDH (10%)) in terms of the porosity of the nanosheet (NS) arrays which not only improves the rate capability as well as cycling stability, but also demonstrates nearly two-fold specific capacitance enhancement compared to Co-free and other NiCoMn-LDH electrodes with a half-cell configuration in 3 M KOH, suggesting that Co-doping is indispensable for improving the electrochemical performance of NiMn-LDH electrodes. Moreover, when this high performing NiCoMn-LDH (10%) electrode is employed as a cathode material to fabricate an asymmetric supercapacitor (ASC) device with reduced graphene oxide (rGO) as an anode material, excellent energy storage performance (57.4 Wh kg⁻¹ at 749.9 W kg⁻¹) and cycling stability (89.4% capacitive retention even after 2500 cycles) are corroborated. Additionally, we present a demonstration of illuminating a light emitting diode for 600 s with the NiCoMn-LDH (10%)//rGO ASC device, evidencing the potential of the NiCoMn-LDH (10%) electrode in fabricating energy storage devices.

中文翻译：

通过受控共掺杂为高能和功率不对称超级电容器量身定制NiMn-LDH纳米片阵列的形貌和电化学性能

在这里，我们通过3D镍泡沫材料对镍锰层状双氢氧化物（NiMn-LDH）纳米结构的表面形貌进行裁剪逐步掺杂钴（Co）的水热化学过程。在10％的最佳Co掺杂水平下，我们注意到，就纳米片（NS）阵列的孔隙率而言，NiMn-LDH纳米结构（NiCoMn-LDH（10％））的微调形貌已得到改善，这不仅提高了速率性能和循环稳定性，但与在3 M KOH中具有半电池配置的无Co和其他NiCoMn-LDH电极相比，其比电容也提高了近两倍，这表明Co掺杂对于改善电化学性能是必不可少的NiMn-LDH电极的性能此外，当将此高性能NiCoMn-LDH（10％）电极用作阴极材料，以还原氧化石墨烯（rGO）作为阳极材料制造不对称超级电容器（ASC）器件时，储能性能优异（57。^-1在749.9千克w ^^-1）和循环稳定性（89.4％保留电容即使经过2500个循环）被证实。此外，我们展示了使用NiCoMn-LDH（10％）// rGO ASC器件照明发光二极管600 s的演示，证明了NiCoMn-LDH（10％）电极在制造储能器件中的电势。

更新日期：2017-09-18

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11