High-performance water system zinc ion battery anode material, manufacturing method and application thereof

A zinc-ion battery and cathode material technology, applied in battery electrodes, active material electrodes, positive electrodes, etc., to achieve the effect of simple preparation process, low equipment requirements, and inhibition of dendrite growth

Active Publication Date: 2019-11-19
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Currently, for NaV 8 o 20 and other series of compounds have not been reported as positive electrode materials for aqueous zinc-ion batteries.

Method used

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  • High-performance water system zinc ion battery anode material, manufacturing method and application thereof
  • High-performance water system zinc ion battery anode material, manufacturing method and application thereof
  • High-performance water system zinc ion battery anode material, manufacturing method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] A high-performance aqueous zinc-ion battery cathode material (Na, Mn) ∑＝1 V 8 o 20 0.04H 2 The preparation method of O comprises steps:

[0047] Weigh manganese sulfate, vanadium pentoxide and sodium sulfate according to the molar ratio of manganese element: vanadium element: sodium element is 1:13:7, fully disperse the weighed raw materials in 50mL water and stir for 30min to obtain a mixed solution; The mass concentration of vanadium pentoxide in the liquid is 0.55mol / L. The pH was adjusted to 2.5 with 37% aqueous acetic acid solution. Transfer the solution to a reaction kettle lined with polytetrafluoroethylene, place the reaction kettle in an oven, and conduct a hydrothermal reaction at 180°C for 72 hours. The precipitate after the hydrothermal reaction is separated by centrifugation, washed with absolute ethanol, and kept at temperature It is a positive electrode material for a zinc ion battery obtained after vacuum drying at 60° C. for 12 hours.

[0048] App...

Embodiment 2

[0063] A high-performance aqueous zinc-ion battery cathode material (Na, Mn) ∑＝1 V 8 o 20 ·nH 2 The preparation method of O (n is 0.01-4), comprises steps:

[0064] Weigh manganese sulfate, vanadium pentoxide and sodium sulfate according to the molar ratio of manganese element: vanadium element: sodium element is 1:1:7, fully disperse the weighed raw materials in 50mL water and stir for 30min to obtain a mixed solution; The mass concentration of vanadium pentoxide in the liquid is 0.55mol / L. Adjust the pH to 2.5 with 36% acetic acid aqueous solution. Transfer the solution to a reaction kettle lined with polytetrafluoroethylene, place the reaction kettle in an oven, and conduct a hydrothermal reaction at 180°C for 72 hours. The precipitate after the hydrothermal reaction is separated by centrifugation, washed with absolute ethanol, and kept at temperature It is a positive electrode material for a zinc ion battery obtained after vacuum drying at 60° C. for 12 hours.

[006...

Embodiment 3

[0069] A high-performance aqueous zinc-ion battery cathode material (Na, Mn) ∑＝1 V 8 o 20 ·nH 2 The preparation method of O (n is 0.01-4), comprises steps:

[0070] Take manganese sulfate, vanadium pentoxide and sodium sulfate according to the molar ratio of manganese element: vanadium element: sodium element is 20:13:7, fully disperse the weighed raw materials in 50mL water and stir for 30min to obtain a mixed solution; The mass concentration of vanadium pentoxide in the liquid is 0.55mol / L. Adjust the pH to 2.5 with 38% aqueous acetic acid solution. Transfer the solution to a reaction kettle lined with polytetrafluoroethylene, place the reaction kettle in an oven, and conduct a hydrothermal reaction at 180°C for 72 hours. The precipitate after the hydrothermal reaction is separated by centrifugation, washed with absolute ethanol, and kept at temperature It is a positive electrode material for a zinc ion battery obtained after vacuum drying at 60° C. for 12 hours.

[00...

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Abstract

The invention provides a high-performance water system zinc ion battery anode material, a manufacturing method and an application thereof. The anode material has the following general formula: (N,M) sigma=1V8O20 nH2O, wherein the N is one of Li, Na, K, Zn, Cu, Mg or Ca, the M is one of Mn, Fe, Co or Ni, and the n is 0.01-4. The anode material can be manufactured through one-step hydrothermal method, a reaction condition is mild, a manufacturing process is simple, and a requirement to equipment is low. A microscopic morphology of the obtained anode material is a nanobelt. The obtained anode material is firstly applied to a water system zinc ion battery, and has electrochemical performance such as a higher specific discharge capacity, a higher cycle stability and the like.

Description

technical field [0001] The invention relates to a high-performance water-based zinc-ion battery cathode material and a preparation method and application thereof, belonging to the technical field of zinc-ion batteries. Background technique [0002] With the development of economy and society, the demand for high-capacity, high-life and high-safety batteries is becoming more and more urgent. Whether it is portable electronic devices or electric vehicles, a longer working time and safer battery is required. High capacity battery. [0003] Among various batteries, the zinc-ion battery uses zinc as the negative electrode of the battery and has a high theoretical capacity (820mAh g -1 ), low redox potential, low cost, and abundant reserves. At the same time, its water-based electrolyte replaces the organic electrolyte to further reduce environmental pollution and is safer. At present, the main challenge for Zn-ion batteries is to find cathode materials that can maintain structu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/485H01M4/62H01M10/36H01M10/38B82Y40/00
CPCB82Y40/00H01M4/485H01M4/628H01M10/36H01M10/38H01M2004/021H01M2004/028Y02E60/10Y02P70/50
Inventor 王书华杜敏桑元华王建军刘宏
Owner SHANDONG UNIV
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