PVA基复合锂电隔膜的制备及性能研究
Preparation and performance of PVA-based composite separator for Li-ion battery
查看参考文献15篇
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文摘
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以聚乙烯醇(PVA)和二氧化锆(ZrO_2)为成膜骨架材料和功能填料,利用相转化法制备PVA-ZrO_2复合微孔锂电隔膜。通过微观形貌、孔隙率、电解液亲和性、耐热性及电化学性能等对其进行表征,考察ZrO_2添加量对隔膜性能的影响,并评价隔膜的电池循环性能和倍率性能。结果表明,当PVA的浓度为10%、ZrO_2的添加量为1.5%时,复合隔膜的电解液润湿性和热稳定性较好,其电解液接触角仅为6°,吸液率达到210%,160℃下热收缩率几乎为0。该隔膜装配电池的倍率容量和循环容量保持性优异,16C电流下的放电容量为0.2C电流的50%,循环100次后容量保持约96%,优于聚烯烃隔膜。 |
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其他语种文摘
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Polyvinyl alcohol(PVA)and zirconium dioxide(ZrO_2)were used as the matrix material and the functional filler,respectively.PVA-ZrO_2composite separator for Li-ion battery was prepared by aphase inversion method.The PVA-ZrO_2 were characterized by morphology,porosity,electrolyte wettability,heat resistance and electrochemical performances.The effects of ZrO_2 filler on the performance of the composite separator were investigated.Results shown that when the solution was consisted of 10%PVA,1.5%ZrO_2particles and 88.5% water, the composite separator possessed excellent electrolyte wettability and thermal stability,the contact angle was only 6° and the electrolyte uptake was 210%.Moreover,the thermal shrinkage was about zero at 160℃.Based on the above advantages,the battery assembled with the optimized composite separator exhibited superior rate capacity retention and cycling capacity retention,for example the discharge capacity at 16Cwas about 50% of that at 0.2C,and the cycling capacity retention after 100cycles was about 96.4%,which was obviously better than those of the polyolefin-based separators. |
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来源
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化工新型材料
,2020,48(10):115-120 【扩展库】
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DOI
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10.19817/j.cnki.issn1006-3536.2020.10.025
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关键词
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聚乙烯醇
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二氧化锆
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隔膜
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润湿性
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耐热性
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电化学性能
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地址
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1.
中国科学院金属研究所, 中国科学院腐蚀与防护实验室, 沈阳, 110016
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辽宁石油化工大学石油化工学院, 抚顺, 113001
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四川星明能源环保科技有限公司, 成都, 610100
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1006-3536 |
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学科
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化学工业 |
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文献收藏号
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CSCD:6835557
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