A Spinel-Integrated P2-Type Layered Composite: High-Rate Cathode for Sodium-Ion Batteries
- 13 January 2016
- journal article
- Published by The Electrochemical Society in Journal of the Electrochemical Society
- Vol. 163 (3), A584-A591
- https://doi.org/10.1149/2.0041605jes
Abstract
Sodium-ion batteries (SIB) are being intensively investigated, owing to the natural abundance and low cost of Na resources. However, the SIBs still suffer from poor rate capability due to the large ionic radius of Na+ ion and the significant kinetic barrier to Na+-ion transport. Here, we present an Fd-3m spinel-integrated P2-type layered composite (P2 + Fd-3m) material as a high-rate cathode for SIBs. The P2 + Fd-3m composite material Na0.50Ni1/6Co1/6Mn2/3O2 shows significantly enhanced discharge capacity, energy density, and rate capability as compared to the pure P2-type counterpart. The composite delivers a high capacity of 85 mA h g−1 when discharging at a very high current density of 1500 mA g−1 (10 C rate) between 2.0 and 4.5 V, validating it as a promising cathode candidate for high-power SIBs. The superior performance is ascribed to the improved kinetics in the presence of the integrated-spinel phase, which facilitates fast electron transport to coordinate with the timely Na+-ion insertion/extraction. The findings of this work also shed light on the importance of developing lattice doping, surface coating, and electrolyte additives to further improve the structural and interfacial stability of P2-type cathode materials and fully realize their practical applications in sodium-ion batteries.Keywords
This publication has 42 references indexed in Scilit:
- Advances and challenges of sodium ion batteries as post lithium ion batteriesRSC Advances, 2015
- High-Capacity, High-Rate Bi–Sb Alloy Anodes for Lithium-Ion and Sodium-Ion BatteriesChemistry of Materials, 2015
- A comprehensive review of sodium layered oxides: powerful cathodes for Na-ion batteriesEnergy & Environmental Science, 2014
- Transition metal oxides for high performance sodium ion battery anodesNano Energy, 2014
- A New Rechargeable Sodium Battery Utilizing Reversible Topotactic Oxygen Extraction/Insertion of CaFeOz (2.5 ≤ z ≤ 3) in an Organic ElectrolyteJournal of the American Chemical Society, 2013
- A zero-strain layered metal oxide as the negative electrode for long-life sodium-ion batteriesNature Communications, 2013
- A New High-Energy Cathode for a Na-Ion Battery with Ultrahigh StabilityJournal of the American Chemical Society, 2013
- Surface-Driven Sodium Ion Energy Storage in Nanocellular Carbon FoamsNano Letters, 2013
- Sodium‐Ion BatteriesAdvanced Functional Materials, 2012
- High capacity, reversible alloying reactions in SnSb/C nanocomposites for Na-ion battery applicationsChemical Communications, 2012