A facile synthesis of a NiMoO4@metal-coated graphene-ink nanosheet structure towards the high energy density of a battery type-hybrid supercapacitor.,Dalton Transactions

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A facile synthesis of a NiMoO4@metal-coated graphene-ink nanosheet structure towards the high energy density of a battery type-hybrid supercapacitor.
Dalton Transactions ( IF 3.5 ) Pub Date : 2020-06-18 , DOI: 10.1039/d0dt00624f
Venkata Thulasivarma Chebrolu ₁ , Balamuralitharan Balakrishnan ₂ , Selvaraj Aravindha Raja ₁ , Hee-Je Kim ₁

Affiliation

Recently, reagent-based electrode materials (urea, ammonium fluoride, hexamethylenetetramine, L-cysteine, acetic acid, and triethylamine) have received great attention in numerous applications (e.g., solar cells, fuels cells, and battery-type hybrid supercapacitors (BHSCs)). Herein, we designed a wrinkle-type nanosheet structure with a mixture of NiMoO₄ using triethylamine via a hydrothermal synthesis. The dual metal ions of Ni²⁺/Ni³⁺ and Mo²⁺/Mo³⁺ can significantly boost the energy storage performance by the support of triethylamine. NiMoO₄ was deposited onto a nickel foam substrate without any binders, and the electrode exhibited a high specific capacitance/capacity of 415.66 F g⁻¹ (249.4 mA h g⁻¹) at 8 mA cm⁻² with a good long-term cycling performance over 5000 cycles. Moreover, we assembled flexible HSCs (NiMoO₄@MCG-ink) as the core, and the outer material delivered a high specific energy of 40.14 W h kg⁻¹ at 1066.39 W kg⁻¹. The HSC device demonstrated excellent long-term durability with a capacity retention of 99%, and various bending conditions were also tested for flexibility of the device after 5000 cycles. Furthermore, a series of two HSC devices were efficient to light up red and green light-emitting diodes (LEDs) for about 60 minutes, indicating its potential applications in energy storage devices. Hence, our work provides new insights into the preparation of new electrode materials for high energy storage performance of lithium-ion batteries (LIBs) and SCs.

中文翻译：

NiMoO4 @金属包覆的石墨烯-墨水纳米片结构的简便合成，可实现电池型混合超级电容器的高能量密度。

近来，基于试剂的电极材料（尿素，氟化铵，六亚甲基四胺，L-半胱氨酸，乙酸和三乙胺）在许多应用（例如太阳能电池，燃料电池和电池型混合超级电容器（BHSC））中受到了极大关注。）。在本文中，我们通过水热合成，使用三乙胺设计了具有NiMoO ₄混合物的皱纹型纳米片结构。Ni ²⁺ / Ni ³⁺和Mo ²⁺ / Mo ³⁺的双金属离子在三乙胺的支持下可以显着提高储能性能。NiMoO ₄在没有任何粘合剂的情况下将其沉积在泡沫镍镍上，并且该电极在8 mA cm ^{-2的条件下}显示出415.66 F g ^-1（249.4 mA hg ^-1）的高比电容/容量，并具有超过5000的良好长期循环性能周期。此外，我们组装了柔性HSC（NiMoO ₄ @ MCG-ink）作为核心，外部材料在1066.39 W kg ^-1时提供了40.14 W h kg ^-1的高比能。。HSC设备表现出出色的长期耐用性，容量保持率达99％，并且还测试了5000次循环后各种弯曲条件下设备的柔韧性。此外，一系列两个HSC器件可有效点亮红色和绿色发光二极管（LED）约60分钟，这表明其在能量存储设备中的潜在应用。因此，我们的工作为锂离子电池（LIB）和SC的高储能性能的新型电极材料的制备提供了新的见识。

更新日期：2020-07-21

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