本文主要研究内容
作者陈关亮（2019）在《高介电PVDF基复合薄膜制备与储能性能研究》一文中研究指出：介电电容因具有高功率密度、充放电快、循环寿命长等优势,在脉冲电源技术、能量收集、逆变器和无源元件等国防和民用领域有着广泛的应用。为了适应现代工业快速发展的挑战和需要,对介电材料提出了更高的要求,如高放电能量密度、高能效、轻质、易加工等。介电陶瓷虽然介电常数大,但击穿强度较小;介电聚合物虽然击穿强度较大,但其介电常数较小,因此单相材料的改进均难以使其储能性能得到质的提升。利用聚合物与介电陶瓷复合制备出的陶瓷/聚合物复合薄膜,可以打破介电常数与高击穿强度无法同时获得的桎梏,为储能性能的大幅提升提供可能性;同时,复合薄膜具有的轻质高柔特性也有利于器件的微型化。本论文以聚偏氟乙烯（PVDF）为基体,PZT、BT、KNN介电陶瓷颗粒为功能相制备了复合薄膜对其性能进行研究。主要研究结论如下:PZT作为聚合物中晶相形核剂可诱导PVDF中β相含量增加,且随着高介电常数PZT颗粒含量的增大,PZT/PVDF复合薄膜的介电常数显著增大。PZT含量在50 vol%时,复合薄膜的介电常数增加到40.8,同时由于PZT颗粒低的介电损耗复合薄膜的介电损耗仍小于0.037。低含量的PZT颗粒在PVDF基体中分散均匀且与基体结合紧密,复合薄膜中无明显缺陷存在,具有高的质量。PZT颗粒含量为3 vol%时复合薄膜的电导率和击穿强度分别为2.11×10-5 S/m和340 kV/mm,其放电能量密度可达到8.88 J/cm3。虽然增大PZT含量有利于增大复合薄膜的介电常数,但薄膜中明显存在的颗粒团聚和气孔等缺陷导致其电导率显著升高,击穿强度明显降低,进而使得复合薄膜的能量密度大幅下降。PZT颗粒含量增大至50 vol%复合薄膜的电导率增大至1.02×10-4 S/m,击穿强度下降至130 kV/mm,此时放电能量密度下降至3.29 J/cm3。利用多巴胺对BT颗粒进行包覆合成的Dopa@BT颗粒,多巴胺壳层的存在提升了颗粒在PVDF基体中的分散性、优化了颗粒与聚合物之间的界面相容性,由此使得Dopa@BT/PVDF复合薄膜的介电损耗、电导率和漏电流得到了显著抑制,其在Dopa@BT含量为10 vol%时的最大放电能量密度达到了6.01 J/cm3,较BT/PVDF复合薄膜提升了43.78%。通过在BT颗粒表面生长超细Ni颗粒制备了具有核-卫星结构的Ni@BT,在此结构中超细Ni颗粒具有的库仑阻塞效应可有效抑制空间电荷在颗粒之间及颗粒与基体之间的传输、聚集,明显降低Ni@BT/PVDF复合薄膜的介电损耗、电导率以及漏电流,从而有效提升复合薄膜的击穿强度,降低其储能损耗,增大其能量密度。Ni@BT颗粒含量为10 vol%的复合薄膜放电能量密度最高可达7.64 J/cm3,较BT/PVDF复合薄膜提升了82.76%。继续降低Ni@BT颗粒含量至3 vol%时,复合薄膜的击穿强度进一步增大至350 kV/mm,此时复合薄膜的放电能量密度高达9.55 J/cm3。利用多巴胺对固相法合成的KNN颗粒进行包覆处理得到了Dopa@KNN颗粒,并以此制备的Dopa@KNN/PVDF复合薄膜具有较低的介电损耗、电导率和漏电流。Dopa@KNN颗粒含量低于13 vol%时,复合薄膜在100 Hz下的电导率值均低于5.7×10-6S/m,漏电流密度值均处于10-7-10-5A/cm2范围内。当Dopa@KNN颗粒含量为3 vol%时,复合薄膜表现出比纯PVDF更低的电导率和更大的击穿强度值,其击穿强度达到了480 kV/mm时,放电能量密度可高达14.7 J/cm3。
Abstract
jie dian dian rong yin ju you gao gong lv mi du 、chong fang dian kuai 、xun huan shou ming chang deng you shi ,zai mai chong dian yuan ji shu 、neng liang shou ji 、ni bian qi he mo yuan yuan jian deng guo fang he min yong ling yu you zhao an fan de ying yong 。wei le kuo ying xian dai gong ye kuai su fa zhan de tiao zhan he xu yao ,dui jie dian cai liao di chu le geng gao de yao qiu ,ru gao fang dian neng liang mi du 、gao neng xiao 、qing zhi 、yi jia gong deng 。jie dian tao ci sui ran jie dian chang shu da ,dan ji chuan jiang du jiao xiao ;jie dian ju ge wu sui ran ji chuan jiang du jiao da ,dan ji jie dian chang shu jiao xiao ,yin ci chan xiang cai liao de gai jin jun nan yi shi ji chu neng xing neng de dao zhi de di sheng 。li yong ju ge wu yu jie dian tao ci fu ge zhi bei chu de tao ci /ju ge wu fu ge bao mo ,ke yi da po jie dian chang shu yu gao ji chuan jiang du mo fa tong shi huo de de zhi gu ,wei chu neng xing neng de da fu di sheng di gong ke neng xing ;tong shi ,fu ge bao mo ju you de qing zhi gao rou te xing ye you li yu qi jian de wei xing hua 。ben lun wen yi ju pian fu yi xi （PVDF）wei ji ti ,PZT、BT、KNNjie dian tao ci ke li wei gong neng xiang zhi bei le fu ge bao mo dui ji xing neng jin hang yan jiu 。zhu yao yan jiu jie lun ru xia :PZTzuo wei ju ge wu zhong jing xiang xing he ji ke you dao PVDFzhong βxiang han liang zeng jia ,ju sui zhao gao jie dian chang shu PZTke li han liang de zeng da ,PZT/PVDFfu ge bao mo de jie dian chang shu xian zhe zeng da 。PZThan liang zai 50 vol%shi ,fu ge bao mo de jie dian chang shu zeng jia dao 40.8,tong shi you yu PZTke li di de jie dian sun hao fu ge bao mo de jie dian sun hao reng xiao yu 0.037。di han liang de PZTke li zai PVDFji ti zhong fen san jun yun ju yu ji ti jie ge jin mi ,fu ge bao mo zhong mo ming xian que xian cun zai ,ju you gao de zhi liang 。PZTke li han liang wei 3 vol%shi fu ge bao mo de dian dao lv he ji chuan jiang du fen bie wei 2.11×10-5 S/mhe 340 kV/mm,ji fang dian neng liang mi du ke da dao 8.88 J/cm3。sui ran zeng da PZThan liang you li yu zeng da fu ge bao mo de jie dian chang shu ,dan bao mo zhong ming xian cun zai de ke li tuan ju he qi kong deng que xian dao zhi ji dian dao lv xian zhe sheng gao ,ji chuan jiang du ming xian jiang di ,jin er shi de fu ge bao mo de neng liang mi du da fu xia jiang 。PZTke li han liang zeng da zhi 50 vol%fu ge bao mo de dian dao lv zeng da zhi 1.02×10-4 S/m,ji chuan jiang du xia jiang zhi 130 kV/mm,ci shi fang dian neng liang mi du xia jiang zhi 3.29 J/cm3。li yong duo ba an dui BTke li jin hang bao fu ge cheng de Dopa@BTke li ,duo ba an ke ceng de cun zai di sheng le ke li zai PVDFji ti zhong de fen san xing 、you hua le ke li yu ju ge wu zhi jian de jie mian xiang rong xing ,you ci shi de Dopa@BT/PVDFfu ge bao mo de jie dian sun hao 、dian dao lv he lou dian liu de dao le xian zhe yi zhi ,ji zai Dopa@BThan liang wei 10 vol%shi de zui da fang dian neng liang mi du da dao le 6.01 J/cm3,jiao BT/PVDFfu ge bao mo di sheng le 43.78%。tong guo zai BTke li biao mian sheng chang chao xi Nike li zhi bei le ju you he -wei xing jie gou de Ni@BT,zai ci jie gou zhong chao xi Nike li ju you de ku lun zu sai xiao ying ke you xiao yi zhi kong jian dian he zai ke li zhi jian ji ke li yu ji ti zhi jian de chuan shu 、ju ji ,ming xian jiang di Ni@BT/PVDFfu ge bao mo de jie dian sun hao 、dian dao lv yi ji lou dian liu ,cong er you xiao di sheng fu ge bao mo de ji chuan jiang du ,jiang di ji chu neng sun hao ,zeng da ji neng liang mi du 。Ni@BTke li han liang wei 10 vol%de fu ge bao mo fang dian neng liang mi du zui gao ke da 7.64 J/cm3,jiao BT/PVDFfu ge bao mo di sheng le 82.76%。ji xu jiang di Ni@BTke li han liang zhi 3 vol%shi ,fu ge bao mo de ji chuan jiang du jin yi bu zeng da zhi 350 kV/mm,ci shi fu ge bao mo de fang dian neng liang mi du gao da 9.55 J/cm3。li yong duo ba an dui gu xiang fa ge cheng de KNNke li jin hang bao fu chu li de dao le Dopa@KNNke li ,bing yi ci zhi bei de Dopa@KNN/PVDFfu ge bao mo ju you jiao di de jie dian sun hao 、dian dao lv he lou dian liu 。Dopa@KNNke li han liang di yu 13 vol%shi ,fu ge bao mo zai 100 Hzxia de dian dao lv zhi jun di yu 5.7×10-6S/m,lou dian liu mi du zhi jun chu yu 10-7-10-5A/cm2fan wei nei 。dang Dopa@KNNke li han liang wei 3 vol%shi ,fu ge bao mo biao xian chu bi chun PVDFgeng di de dian dao lv he geng da de ji chuan jiang du zhi ,ji ji chuan jiang du da dao le 480 kV/mmshi ,fang dian neng liang mi du ke gao da 14.7 J/cm3。
论文参考文献
论文详细介绍
论文作者分别是来自济南大学的陈关亮，发表于刊物济南大学2019-10-31论文，是一篇关于基复合薄膜论文,表面改性论文,介电性能论文,储能性能论文,济南大学2019-10-31论文的文章。本文可供学术参考使用，各位学者可以免费参考阅读下载，文章观点不代表本站观点，资料来自济南大学2019-10-31论文网站，若本站收录的文献无意侵犯了您的著作版权，请联系我们删除。
标签：基复合薄膜论文; 表面改性论文; 介电性能论文; 储能性能论文; 济南大学2019-10-31论文;