基于 MOF 衍生的镍铜双氢氧化物自供电柔性不对称超级电容器利用洋葱鳞片作为有效的生物压电分离器

IF 5.1 4区 材料科学 Q2 ELECTROCHEMISTRY Batteries & Supercaps Pub Date : 2024-09-10 DOI:10.1002/batt.202400369
Bhanu Bhusan Khatua, Parna Maity, Anirban Maitra, Suparna Ojha, Ankita Mondal, Aswini Bera, Sumanta Bera, Arkapriya Das
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引用次数: 0

摘要

现代电子设备需要利用小巧、可穿戴、灵活的基底,通过将传统的能量收集技术与存储机制融合到一个单一的便携式设备中,从而能够同时收集和存储能量。在这里,我们展示了一种低成本、可持续、全固态、自供电的柔性非对称超级电容器(SPASC)装置的制造过程。该装置采用 MOF 衍生的氢氧化镍铜双层纳米薄片涂覆不锈钢(SS)纤维板(NCDH@SS)作为正极,而二氧化锰装饰的不锈钢纤维板活性多孔碳(MnO2-APC@SS)作为负极。这两个电极由 PVA-KOH 凝胶电解质隔离,而洋葱鳞片这种生物压电分离器则确保了有效的分离。通过手指传授引起的机械变形,证明了该装置的自充电能力。这种无整流 SPASC 器件表现出卓越的性能,在施加约 16.25 N 的压缩力(充电至约 214.52 mV)的情况下,在 180 秒内将初步开路电压约 20.89 mV 充电至约 235.41 mV。此外,三个串联的 SPASC 器件可为各种便携式电子设备(如手表、计算器和发光二极管)频繁供电。因此,我们的工作展示了开发可持续、灵活和先进的自供电电子设备的创新和先进方法。
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MOF Derived Ni‐Cu Double Hydroxide Based Self‐Powered Flexible Asymmetric Supercapacitor Using Onion Scale as an Effective Bio‐Piezoelectric Separator
Modern electronic devices necessitate the utilization of compact, wearable, and flexible substrates capable of simultaneously harvesting and storing energy by merging traditional energy harvesting techniques with storage mechanisms into a singular portable device. Here, we present the fabrication of a low‐cost, sustainable, all‐solid‐state, self‐powered flexible asymmetric supercapacitor (SPASC) device. This device features MOF‐derived nickel‐copper double hydroxide nanosheets coated stainless steel (SS) fabric sheet (NCDH@SS) as the positive electrode, while manganese dioxide decorated activated porous carbon on SS fabric sheet (MnO2‐APC@SS) acts as the negative electrode. The electrodes are isolated by a PVA‐KOH gel electrolyte, while onion scale, a bio‐piezoelectric separator, ensures effective separation. The self‐charging ability of the device is demonstrated through mechanical deformation induced by finger imparting. This rectification‐free SPASC device exhibits remarkable performance, achieving a charge up to ~235.41 mV from the preliminary open circuit voltage of ~20.89 mV within 180 s under ~16.25 N of applied compressive force (charged up to ~214.52 mV). Furthermore, three SPASC devices connected in series can power up various portable electronic devices like wristwatches, calculators, and LEDs upon frequent imparting. Our work thus demonstrates an innovative and advanced approach towards the development of sustainable, flexible, and advanced self‐powered electronics.
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来源期刊
CiteScore
8.60
自引率
5.30%
发文量
223
期刊介绍: Electrochemical energy storage devices play a transformative role in our societies. They have allowed the emergence of portable electronics devices, have triggered the resurgence of electric transportation and constitute key components in smart power grids. Batteries & Supercaps publishes international high-impact experimental and theoretical research on the fundamentals and applications of electrochemical energy storage. We support the scientific community to advance energy efficiency and sustainability.
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