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Zinc / polyhalide energy storage cell

A polyhalide, energy storage battery technology, applied in regenerative fuel cells and other directions, can solve the problems of increased battery cost, poor reversibility, etc., to avoid negative effects, low cost, and long cycle life.

Inactive Publication Date: 2012-05-30
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the positive Ce 3+ / C 4+ The reversibility of electricity to redox reactions is poor, and noble metals (Pt) need to be used as electrocatalysts, which greatly increase the cost of batteries

Method used

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  • Zinc / polyhalide energy storage cell

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Such as figure 1 The zinc / polyhalide energy storage battery system consists of a battery module 1, a positive electrolyte storage tank 2, a negative electrolyte storage tank 3, an electrolyte circulation pump 4, and a circulation pipeline system 6; the battery module consists of one or more sections The single cells 1 are connected in series or in parallel, and the single cells 1 include a separator 8 , a positive electrode 13 and a negative electrode 14 .

Embodiment 2

[0030] Electrode preparation

[0031] Carbon felt with a thickness of 3mm is used as the positive electrode material, cut to the required size, washed with acid, alkali, and deionized water, and dried for later use. The hard graphite plate is used as the positive and negative current collectors, and the graphite plate is ready for use after acid washing, alkali washing, and alcohol washing.

[0032] Electrolyte preparation

[0033] Weigh 10.904 grams of zinc chloride and 18.016 grams of zinc bromide, prepare 80 ml of a solution with a concentration of 1M chloride ion and bromide ion, add 0.275 grams of cadmium bromide, 2.982 grams of potassium chloride, and dilute hydrochloric acid before the solution is constant. The pH of the solution was adjusted to 3 with dilute hydrobromic acid.

[0034] Assembly of zinc / polyhalide flow batteries

[0035] Such as figure 1 As shown, the carbon felt is embedded in the electrode frame as the positive electrode 7 of the battery, and the s...

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Abstract

The invention discloses a zinc / polyhalide energy storage cell. An electrode of conductive inert material and an electrolyte solution of zinc chloride solution and zinc bromide solution are used to form a zinc / polyhalide energy storage cell. The zinc / polyhalide energy storage cell employs zinc and polyhalide with small electrochemical equivalent and high hydrogen evolution overpotential are used as active substances of the cell. Anode and cathode electric pair has high potential difference, and the two together decide that the cell technology has high energy density and power density. Compared with a zinc bromine liquid flow cell, a new system energy storage cell has energy density increased by 30%, power density increased by 10%, obviously enhanced removability and reduced cost of the cell system. The anode and the cathode of the cell employ electrolytes with a same element composition to avoid negative influence on cell performance and life caused by crossed contamination of electrolytes; the cell of the invention has advantages of long cycling life, low cost and good mobility and can be widely applied to fields of energy electric power, transportation and information communication, etc.

Description

Technical field: [0001] The invention relates to a novel secondary battery, in particular to a zinc / polyhalide energy storage battery. Background technique: [0002] In order to reduce dependence on fossil energy and reduce greenhouse gas emissions, alternative energy technologies such as renewable energy power generation, electric vehicles, and hybrid vehicles have attracted more and more attention. The secondary battery matching the above application fields has become a bottleneck restricting the development of related industries. Traditional secondary batteries cannot meet the requirements mainly in terms of energy density, power density, cost and life. Therefore, the development of new secondary batteries with high energy density, high power density, low cost, and long life is an inevitable choice for the technical path. [0003] The secondary battery systems that have been commercialized so far mainly include zinc-manganese secondary batteries, zinc-nickel secondary b...

Claims

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Application Information

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IPC IPC(8): H01M8/18
CPCY02E60/528Y02E60/50
Inventor 张华民张立群赖秦志
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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