Strong Magnetic-Field-Engineered Porous Template for Fabricating Hierarchical Porous Ni–Co–Zn–P Nanoplate Arrays as Battery-Type Electrodes of Advanced All-Solid-State Supercapacitors,ACS Applied Materials & Interfaces

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Strong Magnetic-Field-Engineered Porous Template for Fabricating Hierarchical Porous Ni–Co–Zn–P Nanoplate Arrays as Battery-Type Electrodes of Advanced All-Solid-State Supercapacitors
ACS Applied Materials & Interfaces ( IF 8.3 ) Pub Date : 2022-01-07 , DOI: 10.1021/acsami.1c19997
Lu Liu ₁ , Xing Yu ₁ , Weiwei Zhang ₁ , Qingyun Lv ₁ , Long Hou ₁ , Yves Fautrelle ₂ , Zhongming Ren ₁ , Guanghui Cao ₁ , Xionggang Lu ₁ , Xi Li _{1,

2,

3}

Affiliation

The sluggish charge transport kinetics that exist in the energy storage process of all-solid-state supercapacitors (ASSSCs) can be improved by designing open hierarchical porous structures for binder-free electrodes. Herein, a template-directed strategy is developed to fabricate open hierarchical porous Ni–Co–Zn–P nanoplate arrays (NCZP^6T) through phosphating the electrodeposited NiCo–LDH nanosheets loaded on a template. At first, porous conductive NiZn alloy nanoplate arrays are rationally devised as the template by a strong magnetic field (SMF)-assisted electrodeposition. The Lorentz force caused by coupling the SMF with the electrical current induces a magnetohydrodynamic (MHD) flow (including the micro-MHD flow), which homogenizes the deposition coating, tunes the nucleation and growth of the NiZn alloy, and produces pores in the nanoplates. The open hierarchical porous structure offers a larger specific surface area and pore volume for accelerating charge transport and gives a synergistic effect between the inner porous conductive NiZn array template and the outer electrochemical active phosphides for high-performance hybrid ASSSCs. Accordingly, the battery-type electrode of NCZP^6T shows a much higher specific capacitance of 3.81 F cm^–2 at 1 mA cm^–2, enhanced rate capability, and remarkable cycling stability at progressively varying current densities. Finally, the NCZP^6T//FeS ASSSC delivers a high energy density of 77 μW h cm^–2 at a large power density of 12 mW cm^–2, outperforming most state-of-the-art supercapacitors.

中文翻译：

用于制造作为先进全固态超级电容器电池型电极的分层多孔 Ni-Co-Zn-P 纳米板阵列的强磁场工程多孔模板

通过为无粘合剂电极设计开放的分层多孔结构，可以改善全固态超级电容器 (ASSSC) 储能过程中存在的缓慢电荷传输动力学。在此，开发了一种模板导向策略来制造开放的分层多孔 Ni-Co-Zn-P 纳米板阵列（NCZP ^6T）通过磷化加载在模板上的电沉积NiCo-LDH纳米片。首先，通过强磁场（SMF）辅助电沉积，合理地设计了多孔导电NiZn合金纳米板阵列作为模板。由 SMF 与电流耦合引起的洛伦兹力会引起磁流体动力学 (MHD) 流动（包括微 MHD 流动），从而使沉积涂层均匀，调整 NiZn 合金的成核和生长，并在纳米板中产生孔隙. 开放的分级多孔结构提供更大的比表面积和孔体积以加速电荷传输，并在内部多孔导电 NiZn 阵列模板和外部电化学活性磷化物之间产生协同效应，用于高性能混合 ASSSC。因此，^图6T显示了在 1 mA cm ^-2时更高的比电容（3.81 F cm ^-2 ）、增强的倍率能力以及在逐渐变化的电流密度下的显着循环稳定性。最后，NCZP ^6T //FeS ASSSC在 12 mW cm ^–2的大功率密度下提供 77 μW h cm ^–2的高能量密度，优于大多数最先进的超级电容器。

更新日期：2022-01-19

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