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Application of tripolyphosphate mixed transition metal sodium salt in preparation of lithium ion battery or zinc ion battery

A lithium-ion battery, zinc-ion battery technology, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of unsuitable high-current charge and discharge, low ionic conductivity, poor electronic and ionic conductivity, etc. Working voltage, high performance working voltage, effect of reducing production cost

Inactive Publication Date: 2021-06-11
SOUTH CHINA INST OF COLLABORATIVE INNOVATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the electronic and ionic conductivity of this material is poor, and it is not suitable for high-current charging and discharging. Although its electronic conductivity has been greatly improved by means of doping and carbon coating, its ionic conductivity is still low.
[0006] Tripolyphosphoric acid mixed transition metal sodium salt can be used as the positive electrode material of sodium ion battery, but there is no literature reporting the application of this type of material in other ion battery electrode materials

Method used

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  • Application of tripolyphosphate mixed transition metal sodium salt in preparation of lithium ion battery or zinc ion battery
  • Application of tripolyphosphate mixed transition metal sodium salt in preparation of lithium ion battery or zinc ion battery
  • Application of tripolyphosphate mixed transition metal sodium salt in preparation of lithium ion battery or zinc ion battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] CH 3 COONa, Mn(CH 3 COO) 2 and NH 4 h 2 PO 4 Weigh according to the stoichiometric ratio (molar ratio) of Na:Mn:P=3:2:3, and add citric acid monohydrate as a chelating agent with twice the amount of Mn element, add deionized water to dissolve, 80°C Constant temperature magnetic stirring and drying to obtain wet gel;

[0056] Then dry in an oven at 150°C for 12 hours to obtain dry gel; grind to obtain powder;

[0057] Then pre-fire the above product at 350°C for 5h in a 5% hydrogen-argon mixed gas, and then grind it after natural cooling. After grinding evenly, a powder material is obtained; after grinding again evenly, burn it in a 5% hydrogen-argon mixed atmosphere at 600°C for 8h , to obtain carbon-coated tripolyphosphate mixed transition metal sodium salt (manganese) (Na 3 mn 2 P 3 o 11 ).

[0058] The XRD spectrum of the product obtained in this example was collected on a Bruker D8 ADVANCE powder crystal diffractometer, with Cu-Kα (λ=0.154nm) as the light...

Embodiment 2

[0065] CH 3 COONa, CH 3 COOK, Mn(CH 3 COO) 2 and NH 4 h 2 PO 4 Weigh it according to the stoichiometric ratio (molar ratio) of Na:K:Mn:P=2.8:0.2:2:3, and add citric acid monohydrate of twice the amount of Mn element as a chelating agent, add deionized water to dissolve , 80 ℃ constant temperature magnetic stirring drying to obtain wet gel;

[0066] Then dry in an oven at 150°C for 12 hours to obtain dry gel; grind to obtain powder;

[0067] Then pre-fire the above product at 350°C for 5h in a 5% hydrogen-argon mixed gas, and then grind it after natural cooling. After grinding evenly, a powder material is obtained; after grinding again evenly, burn it in a 5% hydrogen-argon mixed atmosphere at 600°C for 8h , to obtain carbon-coated tripolyphosphate mixed transition metal sodium salt (potassium manganese) (Na 2.8 K 0.2 mn 2 P 3 o 11 ).

[0068] The XRD spectrum of the product obtained in this example was collected on a Bruker D8 ADVANCE powder crystal diffractometer...

Embodiment 3

[0072] CH 3 COONa, FeSO 4 , Mn(CH 3 COO) 2 and NH 4 h 2 PO 4 Take by weighing the stoichiometric ratio (mol ratio) of Na:Fe:Mn:P=3:0.4:1.6:3, and add twice the monohydrate citric acid of the molar sum of Mn and Fe element as chelating agent, Add deionized water to dissolve, and dry at 80°C with constant magnetic stirring to obtain a wet gel;

[0073] Then dry in an oven at 150°C for 12 hours to obtain dry gel; grind to obtain powder;

[0074] Then pre-fire the above product at 350°C for 5h in a 5% hydrogen-argon mixed gas, and then grind it after natural cooling. After grinding evenly, a powder material is obtained; after grinding again evenly, burn it in a 5% hydrogen-argon mixed atmosphere at 600°C for 8h , to obtain carbon-coated tripolyphosphate mixed transition metal sodium salt (ferromanganese) (Na 3 mn 1.6 Fe 0.4 P 3 o 11 ).

[0075] The XRD spectrum of the product obtained in this example was collected on a Bruker D8 ADVANCE powder crystal diffractometer, ...

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Abstract

The invention discloses application of triphosphoric acid mixed transition metal sodium salt in preparation of a lithium ion battery or a zinc ion battery. The chemical formula of the tripolyphosphate mixed transition metal sodium salt is Na <x> B <3-x> CyD <2-y> P3O11, wherein B is K, Li, Ca, Rb and Cs; x is more than 0 and less than or equal to 3; C and D are Mn, Sc, Ti, V, Cr, Fe, Co, Ni, Cu, Zn, Al, Mg, Ru, Rh, Tc, In and Mo, and y is more than or equal to 0 and less than or equal to 2. The invention provides a method for synthesizing a high-performance multifunctional secondary battery electrode material, which is suitable for industrial production, by utilizing a sol-gel method. The triphosphoric acid mixed transition metal sodium salt can be used for the positive electrodes or negative electrodes of various rocking chair type batteries (zinc ion batteries, sodium ion batteries or lithium ion batteries), has multifunctionality, high performance, high working voltage and the like, and is beneficial to simplifying a production line and reducing the production cost.

Description

technical field [0001] The invention belongs to the technical field of ion battery electrode materials, in particular to a tripolyphosphoric acid mixed transition metal sodium salt (Na x B 3-x C y D. 2-y P 3 o 11 ) in the preparation of lithium-ion batteries or zinc-ion batteries. Background technique [0002] Due to its excellent electrochemical performance, lithium-ion batteries have become one of the most mature energy storage devices and are widely used in various small portable electronic devices. energy field. With the increasing application of lithium-ion batteries, the price of lithium resources and its inherent resource limitations are gradually attracting people's attention. At the same time, since sodium and lithium are adjacent and in the same main group on the periodic table, they share many similar chemical properties. In addition, the reserves of sodium and zinc elements are very abundant on the earth. The distribution is very wide. Therefore, sodium...

Claims

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Application Information

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IPC IPC(8): H01M4/485H01M4/505H01M4/525H01M4/58H01M10/0525H01M10/054
CPCH01M4/5825H01M4/485H01M4/505H01M4/525H01M10/0525H01M10/054H01M2004/028Y02E60/10
Inventor 范庆华陈怡豪黎嘉杰刘华涛赵彦明
Owner SOUTH CHINA INST OF COLLABORATIVE INNOVATION
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