Novel 3D grid porous Li_(4)Ti_(5)O_(12) thick electrodes fabricated by 3D printing for high performance lithium-ion batteries

查看全文 作　　者：Changyong [1,2]LIU;Yin [1]QIU;Yanliang [1]LIU;Kun [1]XU;Ning [1]ZHAO;Changshi [1]LAO;Jun [2]SHEN;Zhangwei [1,2]CHEN

机构地区：[1]Additive Manufacturing Institute,College of Mechatronics&Control Engineering,Shenzhen University,Shenzhen 518060,China;[2]Guangdong Key Laboratory of Electromagnetic Control and Intelligent Robots,College of Mechatronics&Control Engineering,Shenzhen University,Shenzhen 518060,China

出　　处：《Journal of Advanced Ceramics》索引2022年第11卷第2期,共13页

基　　金：This work is supported by the National Natural Science Foundation of China(Nos.51705334 and 51975384);the Shenzhen Science&Technology Projects(Nos.JCYJ20180305125025855 and JCYJ20200109105618137). 摘　　要：Three-dimensional(3D)grid porous electrodes introduce vertically aligned pores as a convenient path for the transport of lithium-ions(Li-ions),thereby reducing the total transport distance of Li-ions and improving the reaction kinetics.Although there have been other studies focusing on 3D electrodes fabricated by 3D printing,there still exists a gap between electrode design and their electrochemical performance.In this study,we try to bridge this gap through a comprehensive investigation on the effects of various electrode parameters including the electrode porosity,active material particle diameter,electrode electronic conductivity,electrode thickness,line width,and pore size on the electrochemical performance.Both numerical simulations and experimental investigations are conducted to systematically examine these effects.3D grid porous Li_(4)Ti_(5)O_(12)(LTO)thick electrodes are fabricated by low temperature direct writing technology and the electrodes with the thickness of 1085μm and areal mass loading of 39.44 mg·cm^(−2) are obtained.The electrodes display impressive electrochemical performance with the areal capacity of 5.88 mAh·cm^(−2)@1.0 C,areal energy density of 28.95 J·cm^(−2)@1.0 C,and areal power density of 8.04 mW·cm^(−2)@1.0 C.This study can provide design guidelines for obtaining 3D grid porous electrodes with superior electrochemical performance. 关键词：three-dimensional(3D)porous thick electrodes Li_(4)Ti_(5)O_(12)(LTO) 3D printing lithium-ion(Li-ion)battery

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Novel 3D grid porous Li_(4)Ti_(5)O_(12) thick electrodes fabricated by 3D printing for high performance lithium-ion batteries

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