Mesoporous NiCo2Se4 tube as an efficient electrode material with enhanced performance for asymmetric supercapacitor applications,CrystEngComm

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Mesoporous NiCo2Se4 tube as an efficient electrode material with enhanced performance for asymmetric supercapacitor applications
CrystEngComm ( IF 2.6 ) Pub Date : 2021-2-4 , DOI: 10.1039/d0ce01778g
Zhixiang Guo _{1,

2,

3,

4,

5} , Yuting Diao _{1,

2,

3,

4,

5} , Xinru Han _{1,

2,

3,

4,

5} , Zihao Liu _{1,

2,

3,

4,

5} , Yonghong Ni _{1,

2,

3,

4,

5} , Li Zhang _{1,

2,

3,

4,

5}

Affiliation

Electrode materials play a vital role for supercapacitors. The development of an efficient and reproducible strategy for the fabrication of hollow mesoporous materials with specific morphologies and microstructures has attracted considerable research interest in recent years. Herein, NiCo₂Se₄ with a mesoporous surface and one-dimensional tubular hollow structure is synthesized using carbon nanofibers as the template for use as the positive electrode material in asymmetric supercapacitors. Because of the bimetallic selenide component and the unique structure, mesoporous NiCo₂Se₄ tubes demonstrate exceptional energy-storage performance. When evaluated as an electrode material for supercapacitors, these mesoporous NiCo₂Se₄ tubes show a specific capacitance of 209.1 mA h g⁻¹ (1762.1 F g⁻¹) at a current density of 1 A g⁻¹, with a retention of 82% after 10 000 cycles at 5 A g⁻¹. Even when the current density increased to 20 A g⁻¹, 61% is still retained. Asymmetric supercapacitors are assembled by mesoporous NiCo₂Se₄ tubes and active carbon shows a high energy density of 24.03 W h kg⁻¹ at a power density of 1.055 kW kg⁻¹ as well as long-term cycle stability (94% retention of the initial specific capacitance after 10 000 cycles at 5 A g⁻¹). All experimental results highlight that mesoporous NiCo₂Se₄ tubes will be a promising electrode material for practical supercapacitor applications.

中文翻译：

中孔NiCo2Se4管作为高效电极材料，具有增强的性能，适用于不对称超级电容器应用

电极材料对超级电容器起着至关重要的作用。近年来，开发具有特定形貌和微结构的中空介孔材料的有效且可复制的策略的发展引起了相当大的研究兴趣。在此，以碳纳米纤维为模板合成具有介孔表面且具有一维管状中空结构的NiCo ₂ Se ₄，用作不对称超级电容器中的正极材料。由于双金属硒化物成分和独特的结构，中孔NiCo ₂ Se ₄管具有出色的储能性能。当评估为超级电容器的电极材料时，这些中孔NiCo ₂Se ₄管在电流密度为1 A g ^-1时显示出209.1 mA hg ^-1（1762.1 F g ^-1）的比电容，在5 A g ^-1下进行10 000次循环后，保留率为82％。即使当电流密度增加到20 A g ^-1时，仍保持61％。不对称超级电容器由中孔NiCo ₂ Se ₄管组装而成，活性炭在1.055 kW kg ^-1的功率密度下显示出24.03 W h kg ^-1的高能量密度以及长期循环稳定性（94％的保留率）。在5 A g ^-1下进行10000次循环后的初始比电容）。所有实验结果都表明，介孔NiCo ₂ Se ₄管将成为用于实际超级电容器应用的有前途的电极材料。

更新日期：2021-02-24

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