2018
DOI: 10.1016/j.jelechem.2018.04.011
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Sodium-rich iron hexacyanoferrate with nickel doping as a high performance cathode for aqueous sodium ion batteries

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Cited by 47 publications
(29 citation statements)
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“…The N‐coordinated TMs can be partially substituted by a single element or multiple elements in order to adjust the lattice parameters and redox property. Owing to the “zero‐strain” character and higher conductivity of NiHCFs, [ 25,178 ] Ni‐substitution has been widely employed to optimize the performances of NaFeHCFs, [ 179–181 ] KFeHCFs, [ 182,183 ] NaMnHCFs, [ 121,184,185 ] NaCoHCFs, [ 124,186 ] and NaCuHCFs. [ 19,187 ] In addition, the redox‐active Co and Fe have also been used to modify NaMnHCFs [ 102,185,188 ] and KMnHCFs.…”
Section: Elemental Substitutionmentioning
confidence: 99%
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“…The N‐coordinated TMs can be partially substituted by a single element or multiple elements in order to adjust the lattice parameters and redox property. Owing to the “zero‐strain” character and higher conductivity of NiHCFs, [ 25,178 ] Ni‐substitution has been widely employed to optimize the performances of NaFeHCFs, [ 179–181 ] KFeHCFs, [ 182,183 ] NaMnHCFs, [ 121,184,185 ] NaCoHCFs, [ 124,186 ] and NaCuHCFs. [ 19,187 ] In addition, the redox‐active Co and Fe have also been used to modify NaMnHCFs [ 102,185,188 ] and KMnHCFs.…”
Section: Elemental Substitutionmentioning
confidence: 99%
“…For FeHCFs, it is reported that the Ni‐substitution leads to slightly reduced lattice parameters of NaNi x Fe 1‒ x HCF ( x ≤ 0.3) [ 180 ] and KNi x Fe 1‒ x HCF ( x ≤ 0.08), [ 183 ] which can be ascribed to the smaller radius of Ni 2+ (69 pm) than Fe 2+ (78 pm). However, some studies reported a different change, [ 179,181 ] probably due to the existence of the HS‐Fe III that has a smaller radius (65 pm). The addition of Ni 2+ can affect the morphology and particle size of the precipitate due to the changes in nucleation rate and nuclei composition.…”
Section: Elemental Substitutionmentioning
confidence: 99%
“…Recent reports suggest that sodium-and potassium-rich PBAs with the compositions close to the ideal formula of PB A 2 Fe[Fe (CN) 6 ] (A = Na, K) deliver maximal capacity values (higher than 120 mAh g À 1 ). [7][8][9][11][12][13] The presence of Fe(CN) 6 nÀ vacancies [14] in the PB structure results in inferior capacity values (as the number of electroactive Fe 2 + /Fe 3 + sites is significantly diminished in vacancy-rich materials) as well as other behaviors including charge-discharge reversibility and stability characteristics. [15] Apart from the practical characteristics, cation-rich and cation-poor PB materials differ in the mechanism of insertion, which likely involves phase transformations in the course of cation insertion and deinsertion.…”
Section: Introductionmentioning
confidence: 99%
“…Since the amount of research on the energy storage chemistry of PBAs is now sufficiently large, some general trends in Na + and K + insertion mechanisms into PB‐derived materials can be outlined. Recent reports suggest that sodium‐ and potassium‐rich PBAs with the compositions close to the ideal formula of PB A 2 Fe[Fe(CN) 6 ] (A=Na, K) deliver maximal capacity values (higher than 120 mAh g −1 ) . The presence of Fe(CN) 6 n− vacancies in the PB structure results in inferior capacity values (as the number of electroactive Fe 2+ /Fe 3+ sites is significantly diminished in vacancy‐rich materials) as well as other behaviors including charge‐discharge reversibility and stability characteristics …”
Section: Introductionmentioning
confidence: 99%
“…Nevertheless, this kind of material easily suffered inadequate cycling property in medium aqueous electrolytes. [ 124 ] Besides, the nickel‐substituted copper hexacyanoferrate (Na 2 Cu 0.6 Ni 0.4 [Fe(CN) 6 ]) has been used as a superior cathode for aqueous SIBs, and the effect of Ni substitution on the electrochemical properties of Na 2 Cu 1– x Ni x [Fe(CN) 6 ] (0 < x < 1) series was researched in‐depth. As a result, the aqueous SIBs assembled by Na 2 Cu 0.6 Ni 0.4 [Fe(CN) 6 ] cathodes delivered a discharge capacity of 62 mAh g −1 at a current rate of 0.5 C with average operation voltage of 0.62 V (vs Ag/AgCl).…”
Section: Element Dopingmentioning
confidence: 99%