Efficient Stabilization of Na Storage Reversibility by Ti Integration into O′3-Type NaMnO 2
Open Access
- 1 January 2021
- journal article
- Published by American Association for the Advancement of Science (AAAS) in Energy Material Advances
Abstract
The development of an energy storage system with abundant elements is a key challenge for a sustainable society, and the interest of Na intercalation chemistry is extending throughout the research community. Herein, the impact of Ti integration into NaMnO2 in a binary system of NaMnO2–() TiO2 () is systematically examined for rechargeable Na battery applications. Stoichiometric NaMnO2, which is classified as an in-plane distorted O3-type layered structure, delivers a large initial discharge capacity of approximately 200 mAh g-1, but insufficient capacity retention is observed, most probably associated with dissolution of Mn ions on electrochemical cycles. Ti-substituted samples show highly improved electrode performance as electrode materials. However, the appearance of a sodium-deficient phase, Na4Mn4Ti5O18 with a tunnel-type structure, is observed for Ti-rich phases. Among the samples in this binary system, Na0.8Mn0.8Ti0.2O2 (), which is a mixture of a partially Ti-substituted O3-type layered oxide (Na0.88Mn0.88Ti0.12O2) and tunnel-type...Keywords
Funding Information
- Ministry of Education, Culture, Sports, Science and Technology (JPMXP0112101003)
- Japan Society for the Promotion of Science (19H05816, 18H02076, 15H05701)
This publication has 42 references indexed in Scilit:
- Development of SPICA, New Dedicated Neutron Powder Diffractometer for Battery StudiesJournal of Physics: Conference Series, 2014
- Na2FeP2O7: A Safe Cathode for Rechargeable Sodium-ion BatteriesChemistry of Materials, 2013
- Electrochemical and Thermal Properties of α-NaFeO2Cathode for Na-Ion BatteriesJournal of the Electrochemical Society, 2013
- P2-type Nax[Fe1/2Mn1/2]O2 made from earth-abundant elements for rechargeable Na batteriesNature Materials, 2012
- Application of matrix decomposition algorithms for singular matrices to the Pawley method inZ-RietveldJournal of Applied Crystallography, 2012
- Ab Initio Study of the Sodium Intercalation and Intermediate Phases in Na0.44MnO2 for Sodium-Ion BatteryChemistry of Materials, 2012
- Three-Dimensional Visualization in Powder DiffractionSolid State Phenomena, 2007
- Electrochemical intercalation and deintercalation of NaxMnO2 bronzesJournal of Solid State Chemistry, 1985
- Structural classification and properties of the layered oxidesPhysica B+C, 1980
- The structure of Na4Mn4Ti5O18Acta Crystallographica Section B: Structural Science, Crystal Engineering and Materials, 1968