Out-Of-Plane Symmetry Design Arrests Structural Evolution in Layered-Type Framework for Sustainable Sodium Shuttling
Abstract
Sodium-ion batteries (SIBs) offer a compelling and sustainable solution to the challenges of the energy transition and lithium resource scarcity. However, the crystallographic diversity in sodium transition metal oxides (Na x TM y O 2 ) induces symmetry reconfigurations during de/sodiation, posing a formidable challenge to the stable operation of SIBs. Here, we elucidate the critical yet underexplored role of out-of-plane symmetry in mitigating structural evolution in Na x TM y O 2 . By engineering a monoclinic distortion, we establish a distinctive out-of-plane symmetry enabling the coexistence of P- and O-type interstitial sites for Na ions, effectively preventing interlayer oxygen ion slipping and subsequent symmetry evolution, even in deeply desodiated states (with
Fields of Study & Subjects
Structural Analysis and Optimization
Cellular and Composite Structures
Structural Load-Bearing Analysis
Publication details
- Journal / source
- Journal of the American Chemical Society
- Publisher
- American Chemical Society (ACS)
- Volume
- 148
- Issue
- 10
- Pages
- 10356–10365
- Publication date
- 4 March 2026
- Language
- EN