Reduction-Induced Topological Phase Transition to Construct K2Mn[Fe(CN)6] Superstructures for High-Performance Sodium-Ion Batteries DOI
Ruixue Wu, Jie Lin, Yang Shang

et al.

Langmuir, Journal Year: 2024, Volume and Issue: 41(1), P. 926 - 934

Published: Dec. 30, 2024

Potassium manganese-based Prussian blue analogs (KMn-HCF) hold great potential as cathodes for sodium-ion batteries (SIBs). However, the rapid synthesis process often results in excessively small particle sizes, increasing surface area and thereby intensifying side reactions with electrolyte, which can damage cathode electrolyte interface (CEI) diminish cycling stability. Herein, we designed a topological phase transition strategy to assemble KMn-HCF particles into 600 nm cubic superstructure. Structurally, assembled structure significantly improves stability durability of SIB by reducing defects, enhancing uniformity CEI layer, minimizing contact reinforcing structural integrity. From compositional perspective, exhibits lower Jahn–Teller distortion, overall lattice distortion while allowing larger K+ act pillars, supporting Mn-HCF framework preventing capacity degradation caused deterioration. The robust layer formed superstructure delivered stable charge–discharge voltage profiles reversible plateaus, achieving retention 88.4%/89.1% after 1000 cycles at current densities 0.1 0.5 A g–1, respectively.

Language: Английский

Reduction-Induced Topological Phase Transition to Construct K2Mn[Fe(CN)6] Superstructures for High-Performance Sodium-Ion Batteries DOI
Ruixue Wu, Jie Lin, Yang Shang

et al.

Langmuir, Journal Year: 2024, Volume and Issue: 41(1), P. 926 - 934

Published: Dec. 30, 2024

Potassium manganese-based Prussian blue analogs (KMn-HCF) hold great potential as cathodes for sodium-ion batteries (SIBs). However, the rapid synthesis process often results in excessively small particle sizes, increasing surface area and thereby intensifying side reactions with electrolyte, which can damage cathode electrolyte interface (CEI) diminish cycling stability. Herein, we designed a topological phase transition strategy to assemble KMn-HCF particles into 600 nm cubic superstructure. Structurally, assembled structure significantly improves stability durability of SIB by reducing defects, enhancing uniformity CEI layer, minimizing contact reinforcing structural integrity. From compositional perspective, exhibits lower Jahn–Teller distortion, overall lattice distortion while allowing larger K+ act pillars, supporting Mn-HCF framework preventing capacity degradation caused deterioration. The robust layer formed superstructure delivered stable charge–discharge voltage profiles reversible plateaus, achieving retention 88.4%/89.1% after 1000 cycles at current densities 0.1 0.5 A g–1, respectively.

Language: Английский

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