制备了有机/无机双液镁空气电池,研究了双液体系中镁阳极的腐蚀与放电性能及放电形貌。有机溶液隔开了阳极与水溶液,提高了阳极利用率。空气阴极侧用NaCl溶液,保持了电池放电活性。双液电池在 Mg(ClO4)2-AN/NaCl-H2O中以1mA/cm2放电时,电池放电性能优良。镁阳极在有机溶液中不发生点蚀,很少有腐蚀产物吸附。
Mg-air batteries with organic/inorganic double solutions were prepared.Corrosion performance,discharge morphology and discharge performance of Mg anode were studied.Organic electrolytes separated anode from aqueous electrolyte,thus improved anode utilization rate.Due to NaCl electrolyte used in air cathode side,batteries shown higher discharge voltages.Especially in Mg(ClO4)2-AN/NaCl-H2O double electrolytes at 1mA·cm-2 discharge,battery presented better discharge performance.This was due to that anode did not take place local corrosion such as in NaCl electrolyte,and no corrosion products absorption such as in organic solution.
[1] Richey F W,McCloskey B D,Luntz A C.Mg anode corrosion in aqueous electrolytes and implications for Mg-air batteries[J].Journal of the Electrochemical Society,2016,163:A958-A963.
[2] Wu Y P,Wang Z F,Liu Y,et al.AZ61 and AZ61-La alloys as anodes for Mg-air battery[J].Journal of Materials Engineering and Performance,2019,28:2006-2016.
[3] Shyma A P,Palanisamy S,Rajendhran N,et al.Enhanced discharge capacity of Mg-air battery with addition of water dispersible nano MoS2 sheet in MgCl2 electrolyte[J].Ionics,2019,25:583-592.
[4] Liu X,Xue J L,Liu S Z.Discharge and corrosion behaviors of the alpha-Mg and beta-Li based Mg alloys for Mg-air batteries at different current densities[J].Materials & Design,2018,160:138-146.
[5] 石春梅,曾小勤,常建卫,等.AZ31合金用于镁二次电池负极材料的电化学性能[J].中国有色金属学报,2010,20(5):885-890.
[6] Liu X,Xue J L,Zhang D.Electrochemical behaviors and discharge performance of the as-extruded Mg-1.5wt% Ca alloys as anode for Mg-air battery[J].Journal of Alloys and Compounds,2019,790:822-828.
[7] Zhao Y C,Huang G S,Gong G L,et al.Improving the intermittent discharge performance of Mg-air battery by using oxyanion corrosion inhibitor as electrolyte additive[J].Acta Metallurgica Sinica-English Letters,2016,29:1019-1024.
[8] 马景灵,秦聪慧,朱宇杰,等.聚苯乙烯磺酸钠/还原氧化石墨烯对镁空气电池性能的影响[J].材料热处理学报,2019,40(8):168-174.
[9] Wang N G,Mu Y C,Xiong W H,et al.Effect of crystallographic orientation on the discharge and corrosion behaviour of AP65 magnesium alloy anodes[J].Corrosion Science,2018,144:107-126.
[10] Song G L,Atrens A.Corrosion mechanisms of magnesium alloys[J].Advanced Engineering Materials,1999,1:11-18.
[11] Polu A R,Kumar R.Preparation and characterization of PEG-Mg(CH3COO)2-CeO2 composite polymer electrolytes for battery application[J].Bulletin of Materials Science,2014,37(2):309-314.
[12] Deyab M A.Decyl glucoside as a corrosion inhibitor for magnesiumeair battery[J].Journal of Power Sources,2016,325:98-103.
[13] He Y S,Li Q,Yang L L,et al.Electrochemical-conditioning-free and water-resistant hybrid AlCl3/MgCl2/Mg(TFSI)2 electrolytes for rechargeable magnesium batteries[J].Angewandte Chemie,2019,58:7615-7619.
[14] Sheha E,Deftar E M,Magnesium hexakis(methanol)-dinitrate complex electrolyte for use in chargeable magnesium batteries[J].Journal of Solid State Electrochemistry,2018,22:2671-2679.
[15] Li C S,Sun Y,Gebert F,et al.Current progress on rechargeable magnesium-air battery[J].Advanced Energy Materials,2017,7:12-20.
[16] Wang N,Li Y N,Su S J,et al.Effects of binders on the electrochemical performance of rechargeable magnesium batteries[J].Journal of Power Sources,2017,341:219-229.
[17] Konni M,Dadhich A S,Mukkamala S B.Solvent induced surface modifications on hydrogen storage performance of ZnO nanoparticle decorated MWCNTs[J].Sustainable Energy & Fuels,2017,2:466-471.
[18] Yang L,Dordick J S,Garde S,et al.Hydration of enzyme in nonaqueous media is consistent with solvent dependence of its activity[J].Biophysical Journal,2004,87:812-821.
[19] Brown O R,Mcuntyre R.The magnesium and magnesium amalgam electrodes in aprotic organic solvents:a kinetic study[J].Electrochimica Acta,1985,30:627-633.
[20] Aurbach D,Gofer Y,Schechter A,et al.A comparison between the electrochemical behavior of reversible magnesium and lithium electrodes[J].Journal of Power Sources,2001,97-98:269-273.
基金资助
河南省自然科学基金项目(182300410173)
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