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A novel nickel enriched two dimensional vanadium disulfide/PEDOT: PSS as an electrode material for high-performance supercapacitors
Electrochimica Acta ( IF 5.5 ) Pub Date : 2025-01-22 , DOI: 10.1016/j.electacta.2025.145725
Chandru Gunasekaran, Ganesan Shanmugam, Sachin Sreedhar, Monisha Venkatesan

Transition metal dichalcogenides (TMDs) combined with guest molecules, are an emergent material for improving supercapacitor performance. In our approach, an innovative hybrid electrode material, Nickel-Vanadium disulfide/Poly(3,4-ethylenedioxythiophene): polystyrene sulfonate (N-VP), synthesized through a sustainable one-step hydrothermal route. By varying the nickel and vanadium concentrations (5:95, 10:90, 15:85) with the constant PEDOT:PSS, three distinct N-VP variants were synthesized, namely 5N-VP, 10N-VP and 15N-VP each having unique morphological features. Among these, 15N-VP variant exhibited excellent crystallinity and rodlike structure, delivering a high specific capacitance of 1394.4 F/g and areal capacitance of 362.5 F/cm2 at 1 A/g. It maintained 90.52 % of its capacitance after 5000 charge-discharge cycles, underlining its long-term electrochemical stability. A solid-state hybrid material asymmetric supercapacitor (HMASC) device was fabricated using 15N-VP. The device unveiled admirable energy-storage performance, with a specific capacitance of 41.8 F/g and areal capacitance of 6.4 F/cm2 at 1 A/g, energy density of 47 Wh/kg and a power density of 992.9 W/kg. Additionally, it maintained 92.17 % of its capacitance even after 10,000 cycles, highlighting its durability and longevity. These results indicate the N-VP hybrid material as a highly promising candidate for future supercapacitor technologies, offering an ideal balance between high energy and power density along with superior cycle stability.

中文翻译:


一种新型富镍二维二硫化钒/PEDOT:PSS 作为高性能超级电容器的电极材料



过渡金属二硫化物 (TMD) 与客体分子相结合,是提高超级电容器性能的新兴材料。在我们的方法中,通过可持续的一步水热路线合成了一种创新的混合电极材料,镍-钒二硫化物/聚(3,4-乙烯二氧噻吩):聚苯乙烯磺酸盐 (N-VP)。通过用恒定的 PEDOT:PSS 改变镍和钒的浓度 (5:95、10:90、15:85),合成了三种不同的 N-VP 变体,即 5N-VP、10N-VP 和 15N-VP,每个变体都具有独特的形态特征。其中,15N-VP 变体表现出优异的结晶度和棒状结构,在 1 A/g 时提供 1394.4 F/g 的高比电容和 362.5 F/cm2 的面电容。它在 50.52 次充放电循环后仍保持 5000% 的电容,强调了其长期的电化学稳定性。使用 15N-VP 制造了固态混合材料非对称超级电容器 (HMASC) 器件。该设备具有令人钦佩的储能性能,比电容为 41.8 F/g,面电容为 6.4 F/cm2,能量密度为 47 Wh/kg,功率密度为 992.9 W/kg。此外,即使在 10,000 次循环后,它仍能保持 92.17% 的电容,凸显了其耐用性和使用寿命。这些结果表明,N-VP 混合材料是未来超级电容器技术非常有前途的候选材料,在高能量和功率密度之间提供了理想的平衡,同时具有卓越的循环稳定性。
更新日期:2025-01-22
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