
Advances in modification strategies of Prussian blue-type cathode materials for sodium-ion batteries
Huan YANG, Chunchun LI, Liang HE, Yubin NIU
Advances in modification strategies of Prussian blue-type cathode materials for sodium-ion batteries
Prussian blue analogous compounds (PBAs) have emerged as promising candidates for cathode materials in next-generation sodium-ion batteries (SIBs), attributed to their inherent thermodynamic stability, expansive ion intercalation/deintercalation pathways, abundant electrochemically active sites, as well as their adjustable chemical compositions and elemental ratios. However, the electrochemical performance of these materials is frequently compromised by crystal defects and high levels of crystalline and interstitial water content. This review delves into the structure of PBAs, categorizing them from both single-electron and two-electron perspectives. It examines the prevalent challenges faced by PBAs, systematically reviewing existing typical modification strategies across six dimensions: crystallinity control, defect mitigation, morphology modulation, ion doping/substitution, component optimization, and carbon coating/compositing. Furthermore, it offers insights into the current status of PBAs in transitioning from laboratory research to industrial applications. Looking ahead, this paper anticipates the development of PBAs in the realm of SIBs, expecting them to advance from the laboratory stage to industrialized applications through advancements in materials engineering and surface science.
sodium-ion battery / Prussian blue analogues / modification strategy / cathode material
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