Nutan V. Mangate, Sushama M. Giripunje, Subhash B. Kondawar
{"title":"Novel pseudocapacitive one-dimensional copper pyrophosphate (Cu2P2O7) nanofibers for asymmetric supercapacitor","authors":"Nutan V. Mangate, Sushama M. Giripunje, Subhash B. Kondawar","doi":"10.1016/j.electacta.2024.145275","DOIUrl":null,"url":null,"abstract":"The redox activity of a supercapacitor electrode can be significantly compromised by irregular, non-uniform, and agglomerated morphologies of the material. The preparation of a one-dimensional fibrous morphology not only ensures a consistent, continuous, and well-separated network of fibers but also results in an increased surface area compared to higher-dimensional structures. In this study, the fabrication of a continuous network of one-dimensional copper pyrophosphate (Cu<sub>2</sub>P<sub>2</sub>O<sub>7</sub>) nanofibers through a straightforward polymer-based electrospinning method followed by calcination at 900°C is reported. The resulting Cu<sub>2</sub>P<sub>2</sub>O<sub>7</sub> monoclinic nanofibers exhibited an average diameter of 95 nm, highlighting the enhanced surface area of the material. By employing nickel foam (NF) as a current collector, the Cu<sub>2</sub>P<sub>2</sub>O<sub>7</sub>/NF electrode demonstrated a remarkable specific capacitance of 567.31 F g<sup>-1</sup> (357.4 C g<sup>-1</sup>) at 2 A g<sup>-1</sup> in 1 M LiOH electrolyte, surpassing performances in 1 M KOH and 1 M NaOH electrolytes. Furthermore, we designed an asymmetric supercapacitor (ASC) device configuration by incorporating carbon nanofibers (CNFs) as the negative electrode. Cu<sub>2</sub>P<sub>2</sub>O<sub>7</sub>//CNFs asymmetric supercapacitor showcases an exceptional specific capacitance, reaching 143.73 F g<sup>-1</sup> (244.34 C g<sup>-1</sup>) at a current density of 0.4 A g<sup>-1</sup>. This remarkable performance is complemented by a notable energy density of 57.69 Wh kg<sup>-1</sup> and power density of 1104.7 W kg<sup>-1</sup>. Furthermore, even at an elevated power density of 5132.25 W kg<sup>-1</sup>, the device maintained a considerable energy density of 22.81 Wh kg<sup>-1</sup>. These findings underscore the viability of Cu<sub>2</sub>P<sub>2</sub>O<sub>7</sub> nanofibers as a compelling choice for energy storage devices.","PeriodicalId":305,"journal":{"name":"Electrochimica Acta","volume":null,"pages":null},"PeriodicalIF":5.5000,"publicationDate":"2024-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Electrochimica Acta","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1016/j.electacta.2024.145275","RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ELECTROCHEMISTRY","Score":null,"Total":0}
引用次数: 0
Abstract
The redox activity of a supercapacitor electrode can be significantly compromised by irregular, non-uniform, and agglomerated morphologies of the material. The preparation of a one-dimensional fibrous morphology not only ensures a consistent, continuous, and well-separated network of fibers but also results in an increased surface area compared to higher-dimensional structures. In this study, the fabrication of a continuous network of one-dimensional copper pyrophosphate (Cu2P2O7) nanofibers through a straightforward polymer-based electrospinning method followed by calcination at 900°C is reported. The resulting Cu2P2O7 monoclinic nanofibers exhibited an average diameter of 95 nm, highlighting the enhanced surface area of the material. By employing nickel foam (NF) as a current collector, the Cu2P2O7/NF electrode demonstrated a remarkable specific capacitance of 567.31 F g-1 (357.4 C g-1) at 2 A g-1 in 1 M LiOH electrolyte, surpassing performances in 1 M KOH and 1 M NaOH electrolytes. Furthermore, we designed an asymmetric supercapacitor (ASC) device configuration by incorporating carbon nanofibers (CNFs) as the negative electrode. Cu2P2O7//CNFs asymmetric supercapacitor showcases an exceptional specific capacitance, reaching 143.73 F g-1 (244.34 C g-1) at a current density of 0.4 A g-1. This remarkable performance is complemented by a notable energy density of 57.69 Wh kg-1 and power density of 1104.7 W kg-1. Furthermore, even at an elevated power density of 5132.25 W kg-1, the device maintained a considerable energy density of 22.81 Wh kg-1. These findings underscore the viability of Cu2P2O7 nanofibers as a compelling choice for energy storage devices.
期刊介绍:
Electrochimica Acta is an international journal. It is intended for the publication of both original work and reviews in the field of electrochemistry. Electrochemistry should be interpreted to mean any of the research fields covered by the Divisions of the International Society of Electrochemistry listed below, as well as emerging scientific domains covered by ISE New Topics Committee.