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Optimization of prismatic type layered electrode materials for high performance sodium battery
Author(s) -
Ponnaiah Arjunan,
Jeyaseelan Prashanth,
Karuppiah Diwakar,
Mathiyalagan Kouthaman,
Rengapillai Subadevi,
Marimuthu Sivakumar
Publication year - 2021
Publication title -
international journal of energy research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.808
H-Index - 95
eISSN - 1099-114X
pISSN - 0363-907X
DOI - 10.1002/er.6383
Subject(s) - materials science , sodium ion battery , electrochemistry , intercalation (chemistry) , alkali metal , cathode , transition metal , electrode , battery (electricity) , octahedron , alkaline battery , nickel , chemical engineering , inorganic chemistry , crystallography , crystal structure , metallurgy , chemistry , electrolyte , thermodynamics , biochemistry , power (physics) , physics , organic chemistry , faraday efficiency , engineering , catalysis
Summary The prismatic and octahedral type layered cathode materials can provide enhanced performance in sodium‐ion batteries, due to low potential barrier during the intercalation. Among them, the prismatic layered Na‐Ni‐Mn‐O system is the most preferable electrode with a high theoretical capacity of 173 mAhg −1 . The P2‐type phase could be attained only by satisfying the conditions of alkali, and transition metal ratio 0.5 ≤ x ≤ 1. The P2‐type layered structure in the Na‐Ni‐Mn‐O system has been studied via optimizing the alkali and transition metals in two phases. Here, the vacuum assisted solid‐state preparation method was carried out to avoid NiMnO 4 impurities. From diffraction analysis and refinement data, the structural changes were analyzed, then the optimal ratio for perfect P2‐structure has been confirmed. The perfect P2‐structure was obtained only for the samples Na 0.66 Ni 0.3 Mn 0.7 O 2 , Na 0.66 Ni 0.33 Mn 0.67 O 2 . The prepared materials showed the initial discharge capacity of 194 mAhg −1 at 0.1C. Highlights Prismatic type layered Na‐Ni‐Mn‐O electrodes synthesized via simple solid‐state reaction. The prepared electrode delivered initial capacity of 194 mAh g −1 at 0.1 C. Mn richness maintains the low potential barrier for Na‐ion during cycling. This enhances the electrochemical performances of the material. Increment of Nickel concentration enhance the unite cell volume.