Ti‐Substituted NaNi0.5Mn0.5‐xTixO2 Cathodes with Reversible O3−P3 Phase Transition for High‐Performance Sodium‐Ion Batteries
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- 15 March 2017
- journal article
- research article
- Published by Wiley in Advanced Materials
- Vol. 29 (19)
- https://doi.org/10.1002/adma.201700210
Abstract
Sodium‐ion batteries (SIBs) have been considered as potential candidates for stationary energy storage because of the low cost and wide availability of Na sources. O3‐type layered oxides have been considered as one of the most promising cathodes for SIBs. However, they commonly show inevitable complicated phase transitions and sluggish kinetics, incurring rapid capacity decline and poor rate capability. Here, a series of sodium‐sufficient O3‐type NaNi0.5Mn0.5‐ x Ti x O2 (0 ≤ x ≤ 0.5) cathodes for SIBs is reported and the mechanisms behind their excellent electrochemical performance are studied in comparison to those of their respective end‐members. The combined analysis of in situ X‐ray diffraction, ex situ X‐ray absorption spectroscopy, and scanning transmission electron microscopy for NaNi0.5Mn0.2Ti0.3O2 reveals that the O3‐type phase transforms reversibly into a P3‐type phase upon Na+ deintercalation/intercalation. The substitution of Ti for Mn enlarges interslab distance and could restrain the unfavorable and irreversible multiphase transformation in the high voltage regions that is usually observed in O3‐type NaNi0.5Mn0.5O2, resulting in improved Na cell performance. This integration of macroscale and atomicscale engineering strategy might open up the modulation of the chemical and physical properties in layered oxides and grasp new insight into the optimal design of high‐performance cathode materials for SIBs.Keywords
Funding Information
- National Natural Science Foundation of China (51225204, 21303222, 21127901)
- Ministry of Science and Technology of the People's Republic of China (2016YFA0202500)
- Chinese Academy of Sciences (XDA09010100)
- Salt Science Research Foundation
This publication has 50 references indexed in Scilit:
- Earth Abundant Fe/Mn-Based Layered Oxide Interconnected Nanowires for Advanced K-Ion Full BatteriesNano Letters, 2016
- Recent advances in titanium-based electrode materials for stationary sodium-ion batteriesEnergy & Environmental Science, 2016
- Recent Advances and Prospects of Cathode Materials for Sodium‐Ion BatteriesAdvanced Materials, 2015
- β-NaMnO2: A High-Performance Cathode for Sodium-Ion BatteriesJournal of the American Chemical Society, 2014
- Research Development on Sodium-Ion BatteriesChemical Reviews, 2014
- A Honeycomb‐Layered Na3Ni2SbO6: A High‐Rate and Cycle‐Stable Cathode for Sodium‐Ion BatteriesAdvanced Materials, 2014
- Negative electrodes for Na-ion batteriesPhysical Chemistry Chemical Physics, 2014
- Morphology and modulus evolution of graphite anode in lithium ion battery: An in situ AFM investigationScience in China Series B Chemistry, 2013
- Electrode Materials for Rechargeable Sodium‐Ion Batteries: Potential Alternatives to Current Lithium‐Ion BatteriesAdvanced Energy Materials, 2012
- Electrochemical investigation of the P2–NaxCoO2 phase diagramNature Materials, 2010