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Lead methanesulfonate flow battery electrolyte

A technology of lead methanesulfonate and flow batteries, which is applied in the application field of electrolyte additives and lead methanesulfonate flow batteries, can solve the problems of short cycle life, extend the life of anodes, and improve electrocatalysis Effects of activity and stability, improvement of Coulombic efficiency and service life

Inactive Publication Date: 2016-08-31
HAOFA ENVIRONMENTAL PROTECTION TECH SHENZHEN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to overcome the current shortcoming of the short cycle life of the lead methanesulfonate flow battery, improve the performance of the battery from the aspect of electrolyte additives, and add the additive NaF in the lead methanesulfonate electrolyte to improve the battery Positive reactant PbO during charging 2 Electrocatalytic activity and stability, thereby improving the overall Coulombic efficiency and charge-discharge life of the battery

Method used

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  • Lead methanesulfonate flow battery electrolyte
  • Lead methanesulfonate flow battery electrolyte
  • Lead methanesulfonate flow battery electrolyte

Examples

Experimental program
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Effect test

Embodiment 1

[0033] Prepare the electrolyte for a lead methanesulfonate flow battery in a fume hood:

[0034] 1) Slowly add deionized water to CH 3 SO 3 Diluted in H, then in PbCO 3 Add a small amount of deionized water to dilute the CH 3 SO 3 H slowly added to PbCO 3 in the aqueous solution and keep stirring until the reaction is complete, and then add deionized water to dilute the electrolyte solution without additives; where (CH 3 SO 3 ) 2 Pb is 1.8mol:CH 3 SO 3H is 0.3mol, 1L in total.

[0035] 2) Pour them into two 500ml electrolyte bottles on average.

[0036] A Electrolyte: Add 0.005 mol of NaF to the 500ml electrolyte prepared just now, stir evenly, and use it as the electrolyte of the lead methanesulfonate flow battery.

[0037] B Electrolyte: No additives are added.

[0038] The lead methanesulfonate flow battery is assembled according to the above method, connected with A, B electrolyte and pump pipes, and fully tested. Parameter setting of charge and discharge test...

Embodiment 2

[0040] Prepare the electrolyte of lead methanesulfonate flow battery in fume hood: method is the same as embodiment 1, wherein (CH 3 SO 3 ) 2 Pb:CH 3 SO 3 H=1.5:0.9(M), 1L in total.

[0041] Pour into two 500ml electrolyte bottles respectively.

[0042] C Electrolyte: Add 0.0075 mol of NaF to the electrolyte prepared just now, stir evenly, and use it as the electrolyte of the lead methanesulfonate flow battery.

[0043] D Electrolyte: No additives are added.

[0044] The lead methanesulfonate flow battery was assembled in the above-mentioned manner, connected with C, D electrolytes and pump tubes, and fully tested. Parameter setting of charge and discharge test: charge and discharge current density is 10mA / cm 2 , The charging time is 2h, and the linear flow velocity of the electrolyte in the battery is 0.5-5cm / s. The results show that the Coulombic efficiency of the C cell is 90-91%, and the energy efficiency is 74-77%. D cells have a Coulombic efficiency of 70-90% an...

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Abstract

The invention discloses an application of NaF as an additive in a lead methanesulfonate flow battery electrolyte. The electrolyte is a mixture liquid of lead methanesulfonate and methanesulfonic acid, wherein the concentration of the (CH3SO3)2Pb is 0.1-2 M, the concentration of the CH3SO3H is 0-1 M and the concentration of the NaF is 0.005-0.02 M. The NaF, as the additive, prolongs the service life and improves Coulomb efficiency of a battery, wherein the service life of the battery can reach more than 1000 times, the Coulomb efficiency is basically more than 90%, and energy efficiency is higher than 78%.

Description

technical field [0001] The invention relates to the field of flow batteries, in particular to an electrolyte additive that can improve the service life and coulombic efficiency of lead methanesulfonate flow batteries, and the application of the additive in lead methanesulfonate flow batteries. Background technique [0002] With the rapid development of the global economy, the demand for energy continues to grow and the supply of primary energy is insufficient, so the development of other renewable energy sources (wind energy, solar energy, etc.) has become the focus of attention. However, these renewable energy sources are faced with uncertain factors such as volatility, intermittency, dispersion, and randomness that restrict their development. Therefore, efficient energy storage technology is needed to solve the unsteady characteristics of renewable energy generation. Compared with other energy storage technologies, flow batteries are more suitable for renewable energy stor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M8/18
CPCH01M8/188H01M2300/0005Y02E60/50
Inventor 刘政李远发赵健蒋百铃侯靖媛
Owner HAOFA ENVIRONMENTAL PROTECTION TECH SHENZHEN CO LTD
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