A highly-stable layered Fe/Mn-based cathode with ultralow strain for advanced sodium-ion batteries
Research output: Journal Publications and Reviews (RGC: 21, 22, 62) › 21_Publication in refereed journal › peer-review
Author(s)
Detail(s)
Original language | English |
---|---|
Article number | 106206 |
Journal / Publication | Nano Energy |
Volume | 88 |
Online published | 31 May 2021 |
Publication status | Published - Oct 2021 |
Externally published | Yes |
Link(s)
Abstract
Sodium-ion batteries (SIBs) with iron- and manganese-based cathode electrodes have exhibited great promise in the grid-scale energy storage systems, on the basis of the satisfactory theoretical capacity, as well as huge abundance, low price and non-toxicity of raw materials. However, the inferior cycle life of cathode materials originating from their poor structural stability remains a formidable challenge towards practical applications. Here, an efficient strategy of improving the structure durability is demonstrated in iron- and manganese-based cathodes by dual heteroatom doping. The as-obtained P2-type Na0.65Li0.08Cu0.08Fe0.24Mn0.6O2 cathode delivers superior cyclability (88.2% capacity retention for 500 cycles at 2C), fabulous rate capability (76% capacity retention at 5C compared to 0.1C), and a useable reversible capacity of around 85 mAh g−1 at 0.1C. Through in-depth characterizations, the underlying structure-property relationship is established, revealing that the complete solid-solution reaction during cycling ensures the ultralow volume variation (as small as 0.7%) and excellent electrochemical performance. These results highlight the significance of fabricating a stable host for the design and development of advanced SIBs with long life.
Research Area(s)
- Co-substitution strategy, Fe- and Mn-based layered oxide cathodes, Lattice strain, Sodium-ion battery, Solid-solution reaction
Citation Format(s)
A highly-stable layered Fe/Mn-based cathode with ultralow strain for advanced sodium-ion batteries. / Qi, Rui; Chu, Mihai; Zhao, Wenguang et al.
In: Nano Energy, Vol. 88, 106206, 10.2021.Research output: Journal Publications and Reviews (RGC: 21, 22, 62) › 21_Publication in refereed journal › peer-review