CAJ | 학술논문

分别采用酸洗、预烧、浸渍掺铬的方式对电解二氧化锰(EMD)进行预处理,研究EMD预处理对制备锰酸锂性能的影响.采用XRD、ICP等手段对预处理的EMD及制备的锰酸锂进行表征,并通过Li/LiMn2O4电池的充放电测试对其电化学性能进行评估.结果表明,酸洗后EMD中的钠、硫等无机杂质含量显著降低；预烧能够有效去除EMD吸附的水分和有机杂质,扩大孔径,增多反应活性位点;对EMD进行浸渍掺铬的预处理,能够得到更加均质的掺铬锰酸锂材料LiCr0.05M1.95O4,并表现出较好的结构稳定性及容量保持率.
분별채용산세、예소、침지참락적방식대전해이양화맹(EMD)진행예처리,연구EMD예처리대제비맹산리성능적영향.채용XRD、ICP등수단대예처리적EMD급제비적맹산리진행표정,병통과Li/LiMn2O4전지적충방전측시대기전화학성능진행평고.결과표명,산세후EMD중적납、류등무궤잡질함량현저강저；예소능구유효거제EMD흡부적수분화유궤잡질,확대공경,증다반응활성위점;대EMD진행침지참락적예처리,능구득도경가균질적참락맹산리재료LiCr0.05M1.95O4,병표현출교호적결구은정성급용량보지솔.
To investigate the effect of electrolytic MnO2 (EMD) on the performance of LiMn2O4,several pretreatment methods,such as acid treating,presintering and impregnating with chromic salt,were used.The pretreated EMD and prepared LiMn2O4 were characterized by X-ray diffraction and inductively coupled plasma emission spectrometry.Charge and discharge tests of Li/LiMn2O4 batteries were also employed to evaluate electrochemical performance.The experimental results show that inorganic impurity contents in EMD decrease remarkably after acid treating; presintering EMD can remove adsorbent water and organic impurity,enlarge pore space and increase active reaction sites; pre-doping chromium in EMD can form more homogenous compound substance LiCr0.05Mn1.95O4,which shows better structural stability and capacity retention.