CN107565192A - A kind of electrolyte for filling fused salt iron-air cell - Google Patents
A kind of electrolyte for filling fused salt iron-air cell Download PDFInfo
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- CN107565192A CN107565192A CN201710699317.2A CN201710699317A CN107565192A CN 107565192 A CN107565192 A CN 107565192A CN 201710699317 A CN201710699317 A CN 201710699317A CN 107565192 A CN107565192 A CN 107565192A
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- electrolyte
- fused salt
- battery
- eutectic
- air cell
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The invention discloses a kind of electrolyte for filling fused salt iron-air cell, solves the problems, such as that existing electrolyte heavy corrosion air electrode causes cycle performance of battery difference.The composition of the electrolyte is：KCl、LixNayKzCO3The fused salt mixt of eutectic and LiOH, it is respectively KCl 7~15%, Li that each component is calculated according to mole percentxNayKzCO3Eutectic 35~50%, LiOH 35~45%.In the case where battery work is 500 DEG C of temperature, battery charging and discharging circulation by 60 circulations before brings up to 850 circulations, substantially increases the service life of battery, and the average current efficiency of battery is also improved to close to 90%.
Description
Technical field
The present invention relates to a kind of metal-air battery, the electrolyte of fused salt iron-air cell can be particularly filled.
Background technology
Fused salt iron-air cell can be filled and be different from other metal-air batteries, discharging product iron oxide is dissolved completely in electricity
Xie Zhizhong, avoid metal oxide caused by discharging and be deposited on the performance that air electrode is had a strong impact on air electrode, simultaneously
Molten salt electrolyte has electrical conductivity height（1 order of magnitude at least higher than the aqueous solution, several orders of magnitude higher than organic bath）, ion
The advantages that migration and diffusion velocity are fast.
In patent 201510468185.3, electrolyte is made with KCl-LiCl-LiOH fused salt mixts, in battery operating temperature
For 500 DEG C when, voltage efficiency 86%, current efficiency 66.7%, run 60 charge and discharge cycles after current efficiency be down to
55.1%, after circulation terminated due to electrolyte heavy corrosion air electrode.
The content of the invention
It is an object of the invention to provide a kind of electrolyte for filling fused salt iron-air cell, can effectively solve existing electrolysis
The problem of matter heavy corrosion air electrode causes cycle performance of battery difference.
For achieving the above object, the technical solution adopted by the present invention is：A kind of electricity for filling fused salt iron-air cell
Xie Zhi, consisting of：KCl、LixNayKzCO3The fused salt mixt of eutectic and LiOH.
It is preferred that LixNayKzCO3X=0.85~0.89, y=0.61~0.65, z=0.48~0.52 in eutectic.
It is preferred that the above-mentioned electrolyte for filling fused salt iron-air cell, it is respectively KCl that its component is calculated according to mole percent
7~15%, LixNayKzCO3Eutectic 35~50%, LiOH 35~45%.
The Mole percent composition of further preferred electrolyte is 9~14%, LixNayKzCO3Eutectic 42~50%, LiOH
40~45%.
Above-mentioned LixNayKzCO3Eutectic, its preparation method are：X in molar ratio: y :Z=0.85~0.90/0.61
~0.65/0.49~0.51 weighs the Li of respective quality respectively2CO3、Na2CO3、K2CO3, after being ground uniformly in ball mill, dress
Enter in corundum crucible, corundum crucible is put into electric furnace heating afterwards, temperature reaches constant temperature 1 hour at 450 DEG C, obtained
LixNayKzCO3Eutectic.
Beneficial effect：The present invention uses KCl- LixNayKzCO3- LiOH fused salt mixts work as electrolyte in battery
For at 500 DEG C of temperature, battery charging and discharging circulation brings up to 850 circulations by 60 circulations before, overcomes original electrolyte
The drawbacks of heavy corrosion air electrode, so as to substantially increase the service life of battery, in addition, the average current efficiency of battery
Improve to close to 90%.
Embodiment
Technical scheme is further described with reference to specific embodiment：
Embodiment 1
Using iron plate as galvanic anode collector, using nickel sheet as air electrode collector.By 9.5mol% KCl, 48mol%
Li0.85Na0.64K0.51CO3Eutectic, 42.5mol% LiOH, 3m NaOH (m is molal quantity per 1000g electrolyte) and 0.5m
Fe2O3It is fully finely ground well mixed, it is then charged into corundum crucible, the corundum crucible equipped with electrolyte is put into electric furnace heating rises
Temperature constant temperature 4 hours, when electrolyte fully melts, is first put into anode current collector, then places into air electrode collection to 500 DEG C
Electric body, air electrode is completely exposed on fused salt liquid level, constant temperature certain time, uses Wuhan indigo plant electrical measurement test system
（CT2001A）Charge-discharge performance test is carried out, using Multifunctional USB data collecting card（MPS-010601）Applied with Labview
Software records battery charging and discharging voltage changes over time curve, calculates the voltage efficiency and current efficiency of battery.Battery is stable to be transported
930 circulations of row, ceiling voltage efficiency are 87.1%, average voltage efficiencies 78.4%；Maximum current efficiency is 96.6%, average
Current efficiency is 82.3%.
Embodiment 2
Using iron plate as galvanic anode collector, using nickel sheet as air electrode collector.By 11.5mol% KCl, 45mol%
Li0.87Na0.63K0.50CO3The NaOH (m is molal quantity per 1000g electrolyte) and 0.5m of eutectic, 43.5mol% LiOH, 3m
Fe2O3It is fully finely ground well mixed, it is then charged into corundum crucible, the corundum crucible equipped with electrolyte is put into electric furnace heating rises
Temperature constant temperature 4 hours, when electrolyte fully melts, is first put into anode current collector, then places into air electrode collection to 500 DEG C
Electric body, air electrode is completely exposed on fused salt liquid level, constant temperature certain time, uses Wuhan indigo plant electrical measurement test system
（CT2001A）Charge-discharge performance test is carried out, using Multifunctional USB data collecting card（MPS-010601）Applied with Labview
Software records battery charging and discharging voltage changes over time curve, calculates the voltage efficiency and current efficiency of battery.Battery is stable to be transported
850 circulations of row, ceiling voltage efficiency are 85.9%, average voltage efficiencies 76.2%；Maximum current efficiency is 98.6%, average
Current efficiency 88.6%.
Embodiment 3
Using iron plate as galvanic anode collector, using nickel sheet as air electrode collector.By 13.5mol% KCl, 42.5mol%
Li0.90Na0.61K0.49CO3Eutectic, 44mol% LiOH, 3m NaOH (m is molal quantity per 1000g electrolyte) and 0.5m Fe2O
It is fully finely ground well mixed, it is then charged into corundum crucible, the corundum crucible equipped with electrolyte is put into electric furnace is heated to
500 DEG C, constant temperature 4 hours, when electrolyte fully melts, anode current collector is first put into, then places into air electrode collector,
Air electrode is completely exposed on fused salt liquid level, constant temperature certain time, uses Wuhan indigo plant electrical measurement test system（CT2001A）Enter
Row charge-discharge performance is tested, using Multifunctional USB data collecting card（MPS-010601）Battery is recorded with Labview application software
Charging/discharging voltage changes over time curve, calculates the voltage efficiency and current efficiency of battery.810 circulations of battery stable operation,
Ceiling voltage efficiency is 86.3%, average voltage efficiencies 77.1%；Maximum current efficiency is 98.9%, and average current efficiency is
89.2%。
Claims (4)
- A kind of 1. electrolyte for filling fused salt iron-air cell, it is characterised in that：Consisting of KCl, LixNayKzCO3Eutectic and LiOH fused salt mixt.
- 2. the electrolyte according to claim 1 for filling fused salt iron-air cell, it is characterised in that：The LixNayKzCO3 X=0.85~0.89, y=0.61~0.65, z=0.48~0.52 in eutectic.
- 3. the electrolyte according to claim 2 for filling fused salt iron-air cell, it is characterised in that：The each group of electrolyte Divide and calculate respectively KCl 7~15%, Li according to mole percentxNayKzCO3Eutectic 35~50%, LiOH 35~45%.
- 4. the electrolyte according to claim 3 for filling fused salt iron-air cell, it is characterised in that：Mole of electrolyte Percentage composition is 9~14%, LixNayKzCO3Eutectic 42~50%, LiOH 40~45%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710699317.2A CN107565192A (en) | 2017-08-16 | 2017-08-16 | A kind of electrolyte for filling fused salt iron-air cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710699317.2A CN107565192A (en) | 2017-08-16 | 2017-08-16 | A kind of electrolyte for filling fused salt iron-air cell |
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| Publication Number | Publication Date |
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| CN107565192A true CN107565192A (en) | 2018-01-09 |
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| CN201710699317.2A Withdrawn CN107565192A (en) | 2017-08-16 | 2017-08-16 | A kind of electrolyte for filling fused salt iron-air cell |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110797541A (en) * | 2019-11-19 | 2020-02-14 | 广东石油化工学院 | Cathode dual-function electrocatalyst for molten salt iron air battery and application of cathode dual-function electrocatalyst |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105048024A (en) * | 2015-08-04 | 2015-11-11 | 东北石油大学 | Chargeable molten salt iron-air battery and preparation method |
-
2017
- 2017-08-16 CN CN201710699317.2A patent/CN107565192A/en not_active Withdrawn
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105048024A (en) * | 2015-08-04 | 2015-11-11 | 东北石油大学 | Chargeable molten salt iron-air battery and preparation method |
Non-Patent Citations (2)
| Title |
|---|
| BAOCHEN CUI等: ""A long cycle life, high coulombic efficiency iron molten air battery"", 《SUSTAINABLE ENERGY & FUELS》 * |
| RENE I. OLIVARES等: ""The Thermal Stability of Molten Lithium–Sodium–Potassium Carbonate and the Influence of Additives on the Melting Point"", 《JOURNAL OF SOLAR ENERGY ENGINEERING》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110797541A (en) * | 2019-11-19 | 2020-02-14 | 广东石油化工学院 | Cathode dual-function electrocatalyst for molten salt iron air battery and application of cathode dual-function electrocatalyst |
| CN110797541B (en) * | 2019-11-19 | 2022-05-06 | 广东石油化工学院 | Cathode dual-function electrocatalyst for molten salt iron air battery and application of cathode dual-function electrocatalyst |
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| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20180109 |
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| WW01 | Invention patent application withdrawn after publication |