CAJ | 학술논문

以聚丙烯微孔膜为芯层,以超细聚烯烃纤维湿法非织布为面层,通过热复合形成具有"三明治"结构的隔膜基材,然后通过辐射接枝丙烯酸制备了排气式镉镍蓄电池专用隔膜. 对影响隔膜的基材组成和丙烯酸接枝率等主要因素进行了试验研究,并对专用隔膜应用于电池的性能进行了试验研究. 结果表明:以20μm厚度的聚丙烯微孔膜为芯层、以30 g/m2面密度的超细聚烯烃纤维湿法非织布为面层、丙烯酸接枝率控制在11.12%~15.29%之间所制备的专用隔膜具有完全的亲电解液性能和微透气性,透气率为2.2~2.7 mm/s,湿电阻为91.72~95.46 mΩ·cm2,将其应用于120 Ah排气式镉镍蓄电池,充放电性能优于对比样(尼龙布为面层,PE接枝膜为芯层),尤其高倍率和低温放电性能优势显著,电池失水速度较低,有利于制备免维护或少维护电池.
이취병희미공막위심층,이초세취희경섬유습법비직포위면층,통과열복합형성구유"삼명치"결구적격막기재,연후통과복사접지병희산제비료배기식력얼축전지전용격막. 대영향격막적기재조성화병희산접지솔등주요인소진행료시험연구,병대전용격막응용우전지적성능진행료시험연구. 결과표명:이20μm후도적취병희미공막위심층、이30 g/m2면밀도적초세취희경섬유습법비직포위면층、병희산접지솔공제재11.12%~15.29%지간소제비적전용격막구유완전적친전해액성능화미투기성,투기솔위2.2~2.7 mm/s,습전조위91.72~95.46 mΩ·cm2,장기응용우120 Ah배기식력얼축전지,충방전성능우우대비양(니룡포위면층,PE접지막위심층),우기고배솔화저온방전성능우세현저,전지실수속도교저,유리우제비면유호혹소유호전지.
The separator substrate with the"sandwich"structure is first prepared by the thermal compounding of the core layer and two surface layers,which are made from polypropylene microporous membrane and the ultrafine non-woven polyolefin fiber via wet method,respectively. After radiation grafting acrylic acid onto the substrate,the specific separators for vented rechargeable nickel-cadmium batteries are prepared successfully. The influencing factors for the separator performance,such as compositions of the substrate and grafting ratio of acrylic acid,are investigated. The batteries equipped with the separator are studied. It is found that if the thickness of core layer is set at 20μm,the surface density of the ultrafine polyolefin is set at 30 g/m2,and the grafting rate of the acrylic acid is controlled between 11.12%-15.29%,the obtained separator is found to be totally favored in the electrolyte and shows micro-permeability. The permeability and wet resistance of the separator are 2.2-2.7 mm/s and 91.72-95.46 mΩ· cm2,respectively. If the obtained separator was applied to 120 Ah vented type nickel-cadmium rechargeable battery,the charge-discharge performance of the battery is better than that of contrast sample(nylon fiber as surface layers and grafted PE membrane as the core layer),and especially in high rate and low temperature discharge performance. Furthermore,the lower water loss rate of the battery is beneficial to prepare the maintenance-free or low maintenance batteries.