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Transition metal doped Prussian blue homolog and preparation method thereof, and application thereof, and secondary ion battery

A Prussian blue and transition metal technology, applied in the field of energy material preparation and electrochemistry, can solve the problems of reducing the specific capacity of electrode materials, the cycle performance cannot meet the standard of commercial application, etc., and achieves excellent cycle stability, high capacity, Simple preparation method

Pending Publication Date: 2019-09-03
LIAONING STARRY SKY SODIUM BATTERY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, its cycle performance is still not up to the standard for commercial application
In addition, the introduction of conductive polymer PPy will also reduce the specific capacity of the electrode material

Method used

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  • Transition metal doped Prussian blue homolog and preparation method thereof, and application thereof, and secondary ion battery
  • Transition metal doped Prussian blue homolog and preparation method thereof, and application thereof, and secondary ion battery
  • Transition metal doped Prussian blue homolog and preparation method thereof, and application thereof, and secondary ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] This example is used to illustrate the preparation of Prussian blue homologues doped with monovalent transition metals.

[0039] Press Na 4 Fe(CN) 6 : transition metal ion (Co, Ni, Mn, Fe, V)=1:1 molar fraction takes each component (Co ion comes from cobalt chloride, Ni ion comes from nickel chloride, Mn ion comes from manganese acetate, V ion from vanadium chloride, Fe ions from ferrous sulfate) into water, then add sodium chloride (0.5mol / L, 0.8mol / L, 1.0mol / L, 1.5mol / L, 2.0mol / L, 2.5mol / L , 3.0mol / L, 3.5mol / L, 4.0mol / L, 4.5mol / L, 5.0mol / L) into water, fully stirred for 4-24h. The reaction is completed, separated and dried to obtain the Prussian blue homologue (Na y T x mn 1-x [Fe(CN) 6 ]).

[0040] Using X-ray diffraction (XRE; GBC MMA ray detector) to analyze the structure of the Prussian blue homologue doped with a single transition group metal, as figure 1 As shown in (a), there is no miscellaneous peak, indicating that a pure doped Prussian blue homologue...

Embodiment 2

[0043] This example is used to illustrate the preparation of Prussian blue homologues doped with binary transition metals.

[0044] Press Na 4 Fe(CN) 6 : transition metal ion (Co+Mn), (V+Mn), (Fe+Mn)=1:1 molar fraction takes by weighing, and wherein the ratio of Co in transition group metal is 0.15 and 0.3 respectively; Fe is in transition group The proportions in metals are 0.15, 0.3, 0.5, 0.65; the proportion of V in transition metals is 0.5 (Co ions come from cobalt chloride, Mn ions come from manganese acetate, V ions come from vanadium chloride, Fe ions come from sulfurous acid iron). Then, add sodium chloride (0.5mol / L, 0.8mol / L, 1.0mol / L, 1.5mol / L, 2.0mol / L, 2.5mol / L, 3.0mol / L, 3.5mol / L, 4.0mol / L L, 4.5mol / L, 5.0mol / L) into water, fully stirred for 4-24h. The reaction is completed, separated and dried to obtain a binary transition group metal-doped Prussian blue homologue (Na y (T 1 +T 2 ) x mn 1-x [Fe(CN) 6 ]).

[0045] Using X-ray diffraction (XRD; GBC MMA ...

Embodiment 3

[0050] This example is used to illustrate the preparation of Prussian blue homologues doped with ternary transition metals.

[0051] Press Na 4 Fe(CN) 6 : Transition metal ion (Co+Mn+Ni), (Co+Mn+Fe)=1:1 molar fraction takes by weighing, and wherein in transition group metal, Co:Mn:Ni=1:1:1; Co: Mn:Fe=1:1:1 (Co ions come from cobalt chloride, Ni ions come from nickel chloride, Mn ions come from manganese acetate, Fe ions come from ferrous sulfate). Then, add sodium chloride (0.5mol / L, 0.8mol / L, 1.0mol / L, 1.5mol / L, 2.0mol / L, 2.5mol / L, 3.0mol / L, 3.5mol / L, 4.0mol / L L, 4.5mol / L, 5.0mol / L) into water, fully stirred for 4-24h. The reaction is completed, separated and dried to obtain the Prussian blue homologue (Na y (T 1 +T 2 +T 3 ) x mn 1-x [Fe(CN) 6 ]).

[0052] The structure of ternary transition metal-doped Prussian blue homologues was analyzed by X-ray diffraction (XRD; GBC MMA ray detector), as figure 1 As shown in c, there are no miscellaneous peaks, indicating tha...

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Abstract

The invention relates to a transition metal doped Prussian blue homolog and a preparation method thereof and application thereof, and a secondary ion battery. The method has the advantages of simple process flow, less equipment investment, high continuity degree and easy industrial amplification, and the obtained product has uniform particles and high component purity. The novel Prussian blue homolog can be used as a positive electrode material of a secondary battery, particularly shows high capacity of 115 mAh g-1 in the aspect of sodium ion energy storage, has good cycle performance and lowraw material cost, and is a competitive new-generation sodium ion battery positive electrode material.

Description

technical field [0001] The invention belongs to the fields of energy material preparation and electrochemistry, and in particular relates to a transition metal-doped Prussian blue homologue, a preparation method and application thereof, and a secondary ion battery. Background technique [0002] As a promising alternative to lithium-ion batteries, sodium-ion batteries have attracted extensive attention from researchers. However, the commercial application of Na-ion batteries is still stagnant due to the lack of suitable high-capacity and high-rate performance electrode materials. As we all know, the energy density and production cost of batteries mainly depend on the theoretical capacity and price of cathode materials. Therefore, it is particularly important to use the existing sodium-ion battery technology to research and discover cathode materials with low price, long cycle life and high rate performance. [0003] Among many cathode materials for sodium-ion batteries, Pru...

Claims

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Application Information

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IPC IPC(8): H01M4/58H01M10/054C01C3/12
CPCC01C3/12H01M4/58H01M10/054H01M2004/028Y02E60/10
Inventor 侴术雷李维杰李用成李东祥窦士学
Owner LIAONING STARRY SKY SODIUM BATTERY CO LTD
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