通过聚乙烯吡咯烷酮（PVP）辅助 FeS2 原位生长的高性能超级电容器的新策略,Dalton Transactions

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通过聚乙烯吡咯烷酮（PVP）辅助 FeS2 原位生长的高性能超级电容器的新策略
Dalton Transactions ( IF 3.5 ) Pub Date : 2023-06-13 , DOI: 10.1039/d3dt01031g
Muhammad Alief Irham _{1,

2} , Oktaviardi Bityasmawan Abdillah _{1,

2} , Darul Roni Rodiansyah ₁ , Fakhrian Hanif Tejo Baskoro ₁ , Haerul Fahmi ₁ , Takashi Ogi ₃ , Ferry Iskandar _{1,

2,

4}

Affiliation

二硫化铁或黄铁矿（FeS ₂）因其丰富和优异的电化学性能而成为一种有前途的过渡金属硫化物基超级电容器。然而，FeS ₂在充分发挥其潜力方面仍然面临主要障碍，例如能量密度低和导电性差。在这项研究中，我们报道了一种在聚乙烯吡咯烷酮（PVP）的帮助下通过直接一步法合成的高性能FeS _{2超级电容器。}在活性材料上掺入PVP可防止枝晶膨胀，并作为解决当前FeS ₂限制的粘合剂，同时促进一步合成过程。此外，PVP 可以通过实现更快的离子运动来增强电化学性能。硫化铁_{成功合成了2 /PVP纳米复合材料，并将其用于不对称超级电容器，表现出735 F g}^-1（2 A g^-1 ）的高比容量和69.74 W h kg^-1（911 W）千克^-1）。_{FeS 2} /PVP的优异电化学性能得益于 PVP 较低的载流子电阻和更好的表面钝化，电化学实验和第一原理计算都证明了这一点。本研究中提出的高性能超级电容器 FeS₂通过有效方法原位合成，为新型超级电容器电极提供了新的见解。

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Novel strategy for high-performance supercapacitors through the polyvinylpyrrolidone (PVP)-assisted in situ growth of FeS2

Iron disulfide or pyrite (FeS₂) has emerged as a promising transition metal sulfide-based supercapacitor owing to its abundance and superb electrochemical properties. However, FeS₂ still faces major hurdles in realizing its full potential, such as a low energy density and poor conductivity. In this study, we report a high-performance FeS₂ supercapacitor synthesized by a direct one-step process with the help of polyvinylpyrrolidone (PVP). The incorporation of PVP on the active materials prevented dendritic expansion and acted as a binding for solving the current FeS₂ limitations, while facilitating a one-step synthesis process. Additionally, PVP could enhance the electrochemical performance by enabling faster ion movement. An FeS₂/PVP nanocomposite was successfully synthesized, and used in an asymmetric supercapacitor, demonstrating a high specific capacity of 735 F g⁻¹ (at 2 A g⁻¹) and a high energy density of 69.74 W h kg⁻¹ (at 911 W kg⁻¹). The superior electrochemical properties of FeS₂/PVP were enabled by the lower charge-carrier resistance and better surface passivation by PVP, as demonstrated by both electrochemical experiments and first-principles calculations. The high-performance supercapacitor of FeS₂ presented in this study synthesized in situ by an efficient method provides a new insight into novel supercapacitor electrodes.

更新日期：2023-06-13

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