Nanostructured alkali cation incorporated δ-MnO₂cathode materials for aqueous sodium-ion batteries

Abstract

Nanostructured δ-MnO2incorporated with alkali cations (A-δ-MnO2, A = K+and Na+) has been synthesized and evaluated as a cathode material for aqueous sodium-ion batteries.

Synthesis of Hierarchically Porous Nitrogen‐Doped Carbon for Sodium‐Ion Batteries

“…Sodium‐ion batteries (SIBs) have been extensively investigated hoping to eventually meet the requirements for large‐scale electric energy storage (EES) due to their abundant and scattered resources and other beneficial aspects compared to lithium‐ion batteries (LIBs) . Moreover, the operating principle of SIBs is practically identical to LIBs, which greatly facilitates the application of SIBs in EES .…”

An Aqueous Symmetric Sodium‐Ion Battery with NASICON‐Structured Na3MnTi(PO4)3

“…[14,15] Furthermore,c ompared with aqueous electrolytes,the much lower ionic conductivities and higher costs of organic liquid electrolytes possibly impose additional constrains on large-scale application of nonaqueous sodium-ion batteries.T oo vercome the drawbacks of organic liquid electrolytes,t he development of sodium-ion batteries with aqueous electrolytes may represent apromising approach for large-scale storage of electrical energy. [16][17][18][19] Recently,anumber of transition metal oxides,P russian blue analogues,a nd polyanionic frameworks have demonstrated stable sodium storage performance in aqueous electrolytes. [20][21][22][23][24] Particular interests have also been focused on sodium storage in NASICON (Na Super Ionic Conductors)-type compounds because of their structural stability, their large ionic channels,a nd the abundance of sodiuminsertion sites.…”

Challenges and perspectives for manganese‐based oxides for advanced aqueous zinc‐ion batteries

“…Layered‐type MnO 2 (δ‐MnO 2 ), a two‐dimensional infinite layer, is constructed by co‐angled [MnO 6 ] octahedrons (Figure A). Due to controllable synthesis and high theoretical energy densities, layered δ‐MnO 2 have been extensively studied in LIBs, SIBs, etc . Lately, layered δ‐MnO 2 has also aroused interest from researchers as cathode materials for ZIBs, which exhibits outstanding battery performances benefiting from the large interlayer distance (approximately 7.0 Å) of δ‐MnO 2.…”

“…Due to controllable synthesis and high theoretical energy densities, layered δ-MnO 2 have been extensively studied in LIBs, SIBs, etc. 114,115 Lately, layered δ-MnO 2 has also aroused interest from researchers as cathode materials for ZIBs, which exhibits outstanding battery performances benefiting from the large interlayer distance (approximately 7.0 Å) of δ-MnO 2. 83 Kim et al 112 synthesized a flake-like δ-MnO 2 with about 200 nm in diameter via a facile thermal decomposition.…”