Issue 28, 2019

Encapsulation of MoSe2 in carbon fibers as anodes for potassium ion batteries and nonaqueous battery–supercapacitor hybrid devices

Abstract

Potassium ion batteries (PIBs) are considered as promising alternatives to sodium-ion batteries (SIBs) and lithium-ion batteries (LIBs), which can be ascribed to the rich abundance of potassium resources, low cost and high safety. Currently, the development of anode materials for PIBs is still confronted with many serious problems, such as low capacity and poor cycling performance. In this work, sheet-like MoSe2 implanted on the surfaces of carbon nanofibers is successfully synthesized through a simple electrospinning and selenization route. MoSe2/C-700 (selenization at 700 °C) maintains high structural stability and facilitates the intercalation/deintercalation of K+, which benefits from one-dimensional nanofibers with good structural stability and MoSe2 with an expanded interlayer spacing. As a whole, MoSe2/C-700 as an anode for PIBs shows a high reversible capacity of 316 mA h g−1 at 100 mA g−1 over 100 cycles. It also displays a specific capacity of 81 mA h g−1 at 100 mA g−1 over 100 cycles when it first serves as an electrode material for nonaqueous potassium-based battery–supercapacitor hybrid (BSH) devices.

Graphical abstract: Encapsulation of MoSe2 in carbon fibers as anodes for potassium ion batteries and nonaqueous battery–supercapacitor hybrid devices

Supplementary files

Article information

Article type
Paper
Submitted
24 apr 2019
Accepted
24 iyn 2019
First published
27 iyn 2019

Nanoscale, 2019,11, 13511-13520

Encapsulation of MoSe2 in carbon fibers as anodes for potassium ion batteries and nonaqueous battery–supercapacitor hybrid devices

Q. Shen, P. Jiang, H. He, C. Chen, Y. Liu and M. Zhang, Nanoscale, 2019, 11, 13511 DOI: 10.1039/C9NR03480C

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