CAJ | 학술논문

以目前常用的Chevrel相Mo6S8作为正极材料，涂覆在不同集流体(不锈钢、镍、铜、钛)上，以镁为负极，研究了在(PhMgCl)2-AlCl3/四氢呋喃(简称THF)“二代”电解液中集流体对可充镁电池电化学性能的影响。恒流放电-充电结果显示在不锈钢集流体上电池电压极化最小，并且具有较好的循环稳定性；镍、铜次之；钛集流体上的极化最大，循环稳定性也最差。并通过对比放电-充电循环前后电极和集流体表面的微观结构，探讨了集流体对电池性能显著影响的原因。电解液对集流体会造成腐蚀，不同集流体在电解液中的稳定性有差异；正极材料涂覆在不同集流体上，电极表面状况有差异；负载活性材料后集流体发生腐蚀的电位有所降低，使集流体更易受到电解液的腐蚀。
이목전상용적Chevrel상Mo6S8작위정겁재료，도복재불동집류체(불수강、얼、동、태)상，이미위부겁，연구료재(PhMgCl)2-AlCl3/사경부남(간칭THF)“이대”전해액중집류체대가충미전지전화학성능적영향。항류방전-충전결과현시재불수강집류체상전지전압겁화최소，병차구유교호적순배은정성；얼、동차지；태집류체상적겁화최대，순배은정성야최차。병통과대비방전-충전순배전후전겁화집류체표면적미관결구，탐토료집류체대전지성능현저영향적원인。전해액대집류체회조성부식，불동집류체재전해액중적은정성유차이；정겁재료도복재불동집류체상，전겁표면상황유차이；부재활성재료후집류체발생부식적전위유소강저，사집류체경역수도전해액적부식。
The effects of different cathode current collectors (stainless steel, nickel, copper, and titanium) on the electrochemical performance of rechargeable magnesium batteries were investigated. Chevrel phase Mo6S8 acted as the cathode, (PhMgCl)2- AlCl3/tetrahydrofuran (THF) (the second generation electrolyte) as the electrolyte, and magnesium as the anode. Constant current discharge-charge results indicated that the electrochemical polarization of the electrode on stainless steel was the smal est and its cycling stability was the best, fol owed by nickel, copper, and titanium. Microstructure analyses for the electrodes and current col ectors before and after discharge-charge were analyzed to investigate the differing electrochemical performance. The electrolyte corroded the current col ectors to differing degrees. The surfaces of the electrodes differed after coating the active material on different current collectors. The corrosion potentials of the current collectors decreased after loading the active material. This resulted in the current collectors being more susceptible to corrosion by the electrolyte.