A flexible Mn0.5Ti2(PO4)3/C nanofiber film with superior cycling stability for potassium-ion batteries. Issue 47 (25th November 2021)

• Record Type: Journal Article
• Authors: Dai, Jing; Su, Die; Yang, Jianping; Zhang, Wen; Wang, Qianfu; Liu, Li; Hu, Hai; Li, Huifang; Liu, Zhiming
• Is Part Of: Nanoscale. Volume 13:Issue 47(2021)
• Page Start: 19956
• Page End: 19965
• Publication Date: 2021-11-25
• Subjects: Nanoscience -- Periodicals; Nanotechnology -- Periodicals; 620.505
• DOI: 10.1039/d1nr04735c
• Languages: English
• ISSNs: 2040-3364

Abstract

Abstract : A flexible Mn0.5 Ti2 (PO4 )3 /C nanofiber film is first synthesized via electrospinning and applied to potassium-ion batteries as a self-standing anode, delivering exceptional mechanical flexibility and outstanding potassium-ion storage performance. Abstract : First-principles calculations indicate that Mn0.5 Ti2 (PO4 )3 is more suited to potassium-ion storage because of its lower energy gap than that of KTi2 (PO4 )3 . A flexible Mn0.5 Ti2 (PO4 )3 /C nanofiber film (F-MTP/C NFF) has been first synthesized via electrospinning and applied to potassium-ion batteries as a self-standing anode. An integral carbon conductive network, unique one-dimensional nanostructure, and exceptional mechanical flexibility give F-MTP/C NFF outstanding potassium-ion storage performance. Impressively, the self-standing F-MTP/C NFF electrode delivers a high specific capacity of 218 mA h g −1 at 0.02 A g −1 and shows ultra-long cycling stability of 2000 cycles at 1 A g −1 . This work may give a new insight into developing NASICON-type Ti-based materials as flexible electrodes for potassium-ion batteries.