Reduced Energy Barrier for Li+ Transport Across Grain Boundaries with Amorphous Domains in LLZO Thin Films

被引：0
作者：
Yanlin Zhu
Shuai Wu
Yilan Pan
Xiaokun Zhang
Zongkai Yan
Yong Xiang
机构：
[1] University of Electronic Science and Technology of China,School of Materials and Energy
[2] University of Electronic Science and Technology of China,Advanced Energy Research Institute
来源：
Nanoscale Research Letters | / 15卷
关键词：
Solid electrolytes; LLZO; Thin film; Energy barrier; Ionic conductivity;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
The high-resistive grain boundaries are the bottleneck for Li+ transport in Li7La3Zr2O12 (LLZO) solid electrolytes. Herein, high-conductive LLZO thin films with cubic phase and amorphous domains between crystalline grains are prepared, via annealing the repetitive LLZO/Li2CO3/Ga2O3 multi-nanolayers at 600 °C for 2 h. The amorphous domains may provide additional vacant sites for Li+, and thus relax the accumulation of Li+ at grain boundaries. The significantly improved ionic conductivity across grain boundaries demonstrates that the high energy barrier for Li+ migration caused by space charge layer is effectively reduced. Benefiting from the Li+ transport paths with low energy barriers, the presented LLZO thin film exhibits a cutting-edge value of ionic conductivity as high as 6.36 × 10−4 S/cm, which is promising for applications in thin film lithium batteries.
引用
收藏
相关论文
共 236 条
[1]  
Ostfeld AE(2016)High-performance flexible energy storage and harvesting system for wearable electronics Sci Rep 6 26122-4
[2]  
Gaikwad AM(2016)A solid future for battery development Nature Energy 1 1-24
[3]  
Khan Y(2019)Energy autonomous electronic skin npj Flexible Electronics 3 1-38
[4]  
Arias AC(2018)Flexible and stable high-energy lithium-sulfur full batteries with only 100% oversized lithium Nat Commun 9 4480-21
[5]  
Janek J(2015)Solid electrolyte: the key for high-voltage lithium batteries Adv Energy Materials 5 1401408-134
[6]  
Zeier WG(2014)Recent developments in garnet based solid state electrolytes for thin film batteries Curr Opinion Solid State Materials Sci 18 29-483
[7]  
García Núñez C(2017)Status and challenges in enabling the lithium metal electrode for high-energy and low-cost rechargeable batteries Nature Energy 3 16-13728
[8]  
Manjakkal L(2018)Promises, challenges, and recent progress of inorganic solid-state electrolytes for all-solid-state lithium batteries Adv Mater 30 e1705702-1031
[9]  
Dahiya R(2018)Challenges and perspectives of garnet solid electrolytes for all solid-state lithium batteries J Power Sources 389 120-3838
[10]  
Chang J(2019)Recent progress for all solid state battery using sulfide and oxide solid electrolytes J Physics D 52 103001-19392
12345678910