K03Knowledge concept
Prussian blue analogue cathodes
Open frameworks, water, and defect control.
Concept visualMaterial lattice
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Open frameworks, water, and defect control.
Section 01
Prussian blue analogues commonly form comparatively open metal-cyanide coordination networks, with sodium occupancy and transport influenced by framework composition and defects. Any advantage discussion must also address challenges from structural water and vacancies for stability and consistency.
—Open framework provides ion pathways
—Metal sites influence electrochemical reaction
—Vacancies and water affect structural state
Section 02
Precursors, reaction conditions, washing, and drying affect crystal water, particles, and defect distribution, and later storage can change material state. Manufacturing should establish traceable quality indicators rather than use one chemical name to represent all lots.
—Record lot and moisture control
—Record particle-size and morphology distribution
—Record storage and transfer conditions
Section 03
Open-framework material characteristics become cell performance only after electrode formula, compaction, electrolyte matching, and full-cell testing. Compare initial efficiency, cycling, and rate under one protocol, and separate material improvements from process improvements.
—Electrode design affects transport path
—Electrolyte affects interphase stability
—Full cell determines usable sodium inventory
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