A Li+ conductive metal organic framework electrolyte boosts the high-temperature performance of dendrite-free lithium batteries

被引:107
作者
Chen, Nan [1 ]
Li, Yuejiao [1 ]
Dai, Yujuan [1 ]
Qu, Wenjie [1 ]
Xing, Yi [1 ]
Ye, Yusheng [1 ]
Wen, Ziyue [1 ]
Guo, Cui [1 ]
Wu, Feng [1 ,2 ]
Chen, Renjie [1 ,2 ]
机构
[1] Beijing Inst Technol, Beijing Key Lab Environm Sci & Engn, Sch Mat Sci & Engn, Beijing 100081, Peoples R China
[2] Collaborat Innovat Ctr Elect Vehicles Beijing, Beijing 100081, Peoples R China
基金
中国博士后科学基金; 中国国家自然科学基金;
关键词
IONIC-LIQUID; POLYMER ELECTROLYTES; SOLID-ELECTROLYTE; ANODE; CHALLENGES; MECHANISM; LAYER; LIFE; GEL;
D O I
10.1039/c8ta12539b
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Conventional electrolytes of Li metal batteries are highly flammable and volatile, which accelerates the consumption of lithium metal at high temperatures, resulting in catastrophic fires or explosions. Herein, a Li+ conductive metal organic framework electrolyte was prepared to enable dendrite-free Li deposition at high temperatures. This electrolyte stabilizes the electrolyte/electrode interface by promoting the transport of lithium ions and suppresses the formation of Li dendrites by forming a particle-rich coating over the anode during repeated Li plating/stripping. Benefitting from strong interactions between TFSI- anions and the metal atoms of the MOF, the electrolyte demonstrates excellent electrochemical properties, which allows Li/Li cells to operate at 150 degrees C for more than 1200 h without major voltage fluctuations, markedly increasing the stability of Li metal at high temperatures. Furthermore, Li/LiFePO4, LiNi0.33Mn0.33Co0.33O2, Li/LiNi0.8Mn0.1Co0.1O2 and Li/Li4Ti5O12 cells exhibit excellent performance at high temperatures.
引用
收藏
页码:9530 / 9536
页数:7
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