In:
Journal of Materials Chemistry C, Royal Society of Chemistry (RSC), Vol. 11, No. 29 ( 2023), p. 9787-9793
Kurzfassung:
Sodium manganese hexacyanoferrate (MnFe-PB) is a promising cathode material for sodium-ion batteries because of its advantages of high operating voltage and high theoretical capacity. However, the structural phase transition of MnFe-PB during the working process will cause the Jahn–Teller effect, which destroys the stability of the interface and the structure of the material. Considering these factors, it is necessary to build a stable interface on the surface of MnFe-PB to keep the structure stable by using low-cost materials in a simple way for commercial applications. In this work, an ion exchange method is used to form a uniform coating layer of sodium copper hexacyanoferrate (CuFe-PB) on the surface of MnFe-PB. The existence of the coating layer effectively prevents Mn from dissolving into the electrolyte, inhibits the Jahn–Teller effect, and alleviates structural collapse. In 200 cycles at 0.1C, MnFe-PB@CuFe-PB maintains a capacity of 119.3 mA h g −1 , 87.3% more than that of MnFe-PB. This simple and cheap ion exchange method for constructing a stable coating on MnFe-PB can well meet the actual demand of large-scale industrial production.
Materialart:
Online-Ressource
ISSN:
2050-7526
,
2050-7534
Sprache:
Englisch
Verlag:
Royal Society of Chemistry (RSC)
Publikationsdatum:
2023
ZDB Id:
2702245-6
