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Novel Prussian blue sodium battery positive electrode material and application thereof

A Prussian blue and cathode material technology, applied in the field of new energy energy storage devices, can solve problems such as capacity attenuation, and achieve the effects of low material cost, good cycle stability and high rate

Inactive Publication Date: 2019-11-19
INST OF PHYSICS - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, Mn-Fe-based Prussian blue materials have two disadvantages: first, when used in organic systems, the water of crystallization needs to be removed first to have good cycle performance; second, when used in water systems, there is serious Mn dissolution. problem, the capacity will decay rapidly

Method used

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  • Novel Prussian blue sodium battery positive electrode material and application thereof
  • Novel Prussian blue sodium battery positive electrode material and application thereof
  • Novel Prussian blue sodium battery positive electrode material and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The material Na was synthesized according to the above synthesis method 1.8 Fe 0.2 mn 0.8 Fe(CN) 6 0.6H 2 O, carry out X-ray diffraction (X-ray diffraction, XRD) test.

[0037] Prepare the positive electrode sheet according to the method of general water-based batteries, mix evenly according to the weight ratio of active material: carbon black: binder = 8:1:1, coat it on the stainless steel current collector, and press it into the positive electrode after drying. When assembling the three electrodes, Ag / AgCl is used as the reference electrode, and NaCF is saturated 3 SO 3 aqueous solution as electrolyte, excess NaTi 2 (PO 4 ) 3 / C as the counter electrode. When assembling the coin cell, glass fiber is used as the separator, saturated with NaCF 3 SO 3 aqueous solution as electrolyte, excess NaTi 2 (PO 4 ) 3 / C is the negative pole.

[0038] The above battery was tested, and with the use of undoped positive electrode material Na 1.8 MnFe(CN) 6 0.6H 2 O T...

Embodiment 2

[0044] The material Na was synthesized according to the above synthesis method 1.8 Cu 0.2 mn 0.8 Fe(CN) 6 0.6H 2 O, then do XRD test.

[0045]Prepare the positive electrode sheet according to the method of general water-based batteries, mix evenly according to the weight ratio of active material: carbon black: binder = 8:1:1, coat it on the stainless steel current collector, and press it into the positive electrode after drying. When assembling the three electrodes, Ag / AgCl is used as the reference electrode, and NaCF is saturated 3 SO 3 aqueous solution as electrolyte, excess NaTi 2 (PO 4 ) 3 / C as the counter electrode. When assembling the coin cell, glass fiber is used as the separator, saturated with NaCF 3 SO 3 aqueous solution as electrolyte, excess NaTi 2 (PO 4 ) 3 / C is the negative pole.

[0046] The above battery was tested, and with the use of undoped positive electrode material Na 1.8 MnFe(CN) 6 0.6H 2 O The battery prepared by the same method was...

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Abstract

The invention discloses a novel Prussian blue sodium battery positive electrode material and application thereof. The general formula of the novel Prussian blue sodium battery positive electrode material is NaxAyMn1-yFe(CN)6zH2O, wherein A is Fe or Cu, 0<x<=2, 0<y<1, and 0<z<=5; the crystal structure of the positive electrode material simultaneously contains atomic configurations connected with aplurality of bond types of Fe-N, Mn-N and Fe-C, or simultaneously contains atomic configurations connected with a plurality of bond types of Cu-N, Mn-N and Fe-C. The novel Prussian blue sodium batterypositive electrode material greatly improves the Mn dissolution and capacity attenuation problems of the Mn-Fe-based Prussian blue material in a water system, has the characteristics of the high voltage, the high capacity, the high magnification, the long service life and the like, only contains common elements such as Cu, Fe and Mn, and is extremely low in material cost. The method is suitable for being applied to the fields of electric vehicles, energy storage power grids and the like.

Description

technical field [0001] The invention relates to the technical field of new energy storage devices, in particular to a novel Prussian blue sodium battery cathode material and its application. Background technique [0002] In the process of developing clean energy such as wind energy and solar energy, energy storage has become one of the key technologies that limit the large-scale application of renewable energy. Among all energy storage systems, electrochemical energy storage has attracted extensive attention from governments and scholars in various countries due to its advantages such as simple maintenance, high conversion efficiency, and flexibility. In electrochemical energy storage, lithium-ion batteries are widely used in people's lives due to their high voltage, high capacity, and long cycle life. It has been applied from small household appliances to high energy density and high power application equipment, such as electric vehicles and national grid. However, due to...

Claims

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Application Information

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IPC IPC(8): H01M4/485H01M4/58H01M10/054
CPCH01M4/485H01M4/5825H01M10/054Y02E60/10
Inventor 胡勇胜蒋礼威陈立泉
Owner INST OF PHYSICS - CHINESE ACAD OF SCI
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