CAJ | 학술논문

尖晶石型锰酸锂的容量衰减是限制其大规模应用的瓶颈问题。现有观点认为二价锰离子在阳极上还原成金属锰，催化电解质分解、毒化固体电解质界面（SEI）膜，造成了锰酸锂体系锂离子电池的容量衰减。但最新研究确定锰元素是以二价的锰沉积在阳极上，并没有被还原成金属锰。本研究介绍国内外锰系锂离子电池容量衰减的研究进展，并在“沉积阳极上的锰氧化态是+2价”这个新发现的基础上，结合分析其它文献的实验数据，归纳总结出“二价锰离子与阳极SEI膜中的活性锂离子进行离子交换而沉积在阳极上，阻碍、堵塞活性锂离子的自由进出，从而引起锂离子电池容量衰退”新观点。
첨정석형맹산리적용량쇠감시한제기대규모응용적병경문제。현유관점인위이개맹리자재양겁상환원성금속맹，최화전해질분해、독화고체전해질계면（SEI）막，조성료맹산리체계리리자전지적용량쇠감。단최신연구학정맹원소시이이개적맹침적재양겁상，병몰유피환원성금속맹。본연구개소국내외맹계리리자전지용량쇠감적연구진전，병재“침적양겁상적맹양화태시+2개”저개신발현적기출상，결합분석기타문헌적실험수거，귀납총결출“이개맹리자여양겁SEI막중적활성리리자진행리자교환이침적재양겁상，조애、도새활성리리자적자유진출，종이인기리리자전지용량쇠퇴”신관점。
The capacity fade of spinel lithium manganese oxide cell is a bottleneck challenge for its large-scale application. It is traditionally thought that Mn(II) ions at the anode is reduced to the metallic manganese that helps for catalyzing electrolyte decomposition. This could poison and damage the solid electrolyte interface (SEI) film leading to the capacity fade in Li-ion batteries. But the latest research has identified that the manganese deposited on the anode is +2 valent, and is not reduced to the metallic manganese. Research progresses of capacity fade of manganese lithium ion batteries in the world were introduced in this paper, based on the new discovery “manganese deposited on anode is +2 valent” and the results obtained from the literature, a new mechanism has been purposed that Mn(II) is exchanged with active Li-ion in anode SEI film, then deposited at the anode, which hinders and/or blocks the intercalation/de-intercalation of lithium ions, then leads to the capacity fade in Li-ion batteries.