3D打印超拉伸凝胶电解质的制备及在柔性铝空气电池中的应用  

Preparation of 3D-printed superstretching gel electrolyte and its application in flexible aluminum-air battery

作　　者：龙盖琼 吴晓斌 于影[2] 陈洪立[1] 左春柽[2] LONG Gaiqiong;WU Xiaobin;YU Ying;CHEN Hongli;ZUO Chuncheng(Faculty of Mechanical Engineering&Automation,Zhejiang Sci-Tech University,Hangzhou 310018,Zhejiang,China;College of Information Science and Engineering,Jiaxing University,Jiaxing 314000,Zhejiang,China)

机构地区：[1]浙江理工大学机械与自动控制学院,浙江杭州310018 [2]嘉兴学院信息科学与工程学院,浙江嘉兴314000

出　　处：《精细化工》2022年第11期2321-2327,共7页Fine Chemicals

基　　金：浙江省自然科学基金项目(LQ20E040007,LGG21E050021);嘉兴市应用性基础研究专项(2020AY10015,2019AY11019,2020AD10015)。

摘　　要：以细菌纤维素(BC)、聚乙烯醇(PVA)为原料,通过3D打印与冻融循环法制备了超拉伸凝胶电解质。采用SEM、接触角测量仪、XRD、电化学工作站和微机控制电子万能试验机对凝胶电解质物理性能、电化学性能及拉伸性能进行了表征,对其孔隙率和吸液率进行了测试。结果表明,当m(BC)∶m(PVA)=0.0048∶1时,基于3D打印制备的凝胶电解质具有稳定的三维网络结构、优异的拉伸性能和电化学性能,拉伸强度可达0.90 MPa、断裂伸长率可达961%、离子电导率为11.00×10^(-2) S/cm。将该凝胶电解质应用于柔性铝空气电池,功率密度可达21.0 mW/cm^(2),电流密度为20 mA/cm^(2)时,铝阳极比容量为1124 mA·h/g,电池可稳定放电90 min。Superstretching gel electrolyte was prepared by 3D printing and freeze-thaw cycle method using bacterial cellulose(BC)and polyvinyl alcohol(PVA)as raw materials.The physical,electrochemical and tensile properties of the gel electrolyte obtained were then characterized by SEM,contact angle measuring instrument,XRD,electrochemical workstation and microcomputer controlled electronic universal testing machine,followed by porosity and absorbency measurements.The results showed that the gel electrolyte with an mass ratio of BC to PVA of 0.0048∶1 prepared by 3D printing exhibited a stable three-dimensional network structure,excellent tensile properties and electrochemical performance with tensile strength 0.90 MPa,the elongation at break up to 961%,and the ionic conductivity 11.00×10^(-2) S/cm.Application analysis of gel electrolyte in flexible aluminum-air battery indicated that the battery reached 21.0 mW/cm^(2) in power density,1124 mA·h/g in specific capacity of aluminum anode and maintained stable discharge for 90 min at current density of 20 mA/cm^(2).

关 键 词：3D打印 超拉伸性能 柔性铝空气电池 凝胶电解质 有机电化学与工业 

分 类 号：TQ427.26[化学工程] TM911.41[电气工程—电力电子与电力传动]