Zinc-bromine single-flow battery

A technology of flow battery and zinc-bromine monolayer, which is applied in fuel cells, battery electrodes, regenerative fuel cells, etc., can solve the problems of complex structure, low content of active substances, affecting the charging capacity of batteries, etc., to achieve large space and improve charging capacity. Effect

Pending Publication Date: 2018-03-27
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the pumpless design on both sides, the actual energy density of the battery is low, and it cannot be charged and discharged with a large current.
The patent introduces a zinc-bromine single-flow battery technology, which eliminates the positive electrode circulation pipeline, and the positive electrode uses a mixed paste of active materials, complexing

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0033] Example 1

[0034] 1) The positive electrode uses a carbon felt of 4x4x0.5cm specifications, and the negative electrode uses a carbon felt of 4x4x0.5cm specifications

[0035] 2) Prepare 60ml of 2mol / L zinc bromide solution for use.

[0036] Battery assembly:

[0037] Such as figure 1 , The single cell includes a positive terminal plate, a positive electrode current collector, a positive electrode (carbon felt), a PE porous film, a negative electrode, a negative electrode current collector, and a negative electrode terminal plate in order.

[0038] The negative electrolyte input pipeline between the negative electrode and the circulation pump is provided with a branch pipeline as the positive electrolyte filling input pipeline, and the positive electrolyte filling input pipeline is connected with the porous material of the positive electrode or the cavity between the positive electrode and the diaphragm;

[0039] The negative electrolyte output pipeline is provided with a branch p...

Example Embodiment

[0043] Example 2

[0044] 1) The positive electrode adopts three carbon felts of 4x4x0.5cm specifications, and the negative electrode adopts one carbon felt of 4x4x0.5cm specifications.

[0045] 2) Prepare 60ml of 2mol / L zinc bromide solution for use.

[0046] The battery assembly and operation are the same as in Example 1

[0047] The single cell includes a positive terminal plate, a positive current collector, a positive electrode, Nafion117 membrane, a negative electrode, a negative current collector, and a negative terminal plate in order.

[0048] by Figure 4 It can be seen that the battery electrode area is 36cm 2 , Charge and discharge current density: 40mA / cm 2 , Charging time 1.5h, battery Coulomb efficiency: 96%, voltage efficiency: 86%, energy efficiency: 81%.

Example Embodiment

[0049] Example 3

[0050] 1) The positive electrode uses two 4x4x0.5cm carbon felts, and the negative electrode uses one 4x4x0.5cm carbon felt

[0051] 2) Prepare 60ml of 2mol / L zinc bromide solution for use.

[0052] The battery assembly and operation are the same as in Example 1

[0053] The single cell includes a positive electrode terminal plate, a positive electrode current collector, a positive electrode, a PP porous film, a negative electrode, a negative electrode current collector, and a negative electrode terminal plate in order.

[0054] by Figure 5 It can be seen that the battery electrode area is 36cm 2 , Charge and discharge current density: 40mA / cm 2 , Charging time 2h, battery Coulomb efficiency: 94%, voltage efficiency: 86%, energy efficiency: 81%.

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Abstract

The invention relates to a zinc-bromine single-flow battery. The positive electrode of the battery is a porous material; a cavity is arranged between the positive electrode and a diaphragm; and poresin the porous material of the positive electrode or the cavity between the positive electrode and the diaphragm is filled with an electrolyte. During initial operation of the battery, the electrolyteis infused into the positive electrode via a pipeline provided with a valve. The battery provided by the invention has the characteristics of high energy density, long cycle life, low cost, and simplestructure and manufacturing process.

Description

technical field [0001] The invention relates to the technical field of single-flow batteries, in particular to the field of zinc-bromine single-flow batteries. Background technique [0002] Zinc-bromine redox flow battery (ZBB) is a low-cost, high-efficiency, environment-friendly flow energy storage battery with high energy density and current efficiency, simple and easy-to-operate device, and long service life. , low cost and other advantages, mainly used in power grid peak regulation, renewable energy generation such as wind energy and solar energy, electric vehicles and other fields. [0003] The traditional zinc-bromine flow battery adopts a double-pump and double-pipe design. During the charging and discharging process, the circulating pump is used to drive the electrolyte to circulate in the battery. When the battery is not working, the electrolyte is extracted from the battery cavity and stored in the liquid storage tank, so that the electrolyte is disconnected betwe...

Claims

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Application Information

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IPC IPC(8): H01M8/18H01M4/88H01M4/86
CPCH01M4/86H01M4/8892H01M8/188Y02E60/50
Inventor 赖勤志张华民李先锋许鹏程
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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