利用浸渍法在聚丙烯微孔膜(Celgard2400)表面涂覆掺有纳米二氧化硅的聚氧乙烯(PEO),制备了新型锂电池用复合隔膜.采用交流阻抗法、扣式电池充放电等实验技术测试了复合隔膜的电化学性能.
New composite seperators for lithium ion batteries were prepared by coating PEO mixed with nanosize SiO_(2)onto microporous polypropylene(PP) seperators. Highly conductive electrolytes were prepared by soaking them in an electrolyte solution. With these composite separators, the lithium ion cell consisting of Li anode and LiNi_(0.8)Co_(0.2)O_(2)cathode were assembled. The high initial discharge capacity and good capacity retention were obtained through the cell.
[1] VenugopalG,MooreJ,HowardJ,etal.Characterizationofmicroporousseparatorsforlithium-ionbatteries[J].J.PowerSources,1999,77:34.
[2] KuribayashiI.Characterizationofcompositecellulosicseparatorsforrechargeablelithium-ionbatteries[J].J.PowerSources,1996,63:87.
[3] DongWonKim,JangMyoun,JongHanChun,etal.Electrochemicalperformancesoflithium-ioncellspreparedwithpolyethyleneoxide-coatedseparators[J\〗.ElectrochemistryCommunications,2001,(3):535538.
[4] YangY,ChengH,HongHY.Preparationofnewcompositeseperatorsforlithium-ionbatteries[P].CN1192941,2003.10.