High-performance lithium metal batteries enabled by a nano-sized garnet solid-state electrolyte modified separator

Yu，Kai1,2; Zeng，Huipeng1; Ma，Jun1; Jiang，Yidong1; Li，Huiyun1; Zhang，Ludan5; Zhang，Qiangqiang5; Shan，Xuyi6; Li，Tingting7; Wu，Xiaoqi1; Xu，Hongli1; Huang，Wei3; Wang，Chaoyang4; Chi，Shang Sen1; Wang，Jun1; Gong，Qing2; Deng，Yonghong1

2024-01-15

10.1016/j.cej.2023.148038

Chemical Engineering Journal   影响因子和分区

1385-8947

Lithium metal batteries, as one of high-energy-density batteries, have become the hot spot for numerous researchers. However, serious safety problems caused by lithium dendrites need to be urgently addressed. In this work, we introduce nano-sized garnet solid-state electrolyte LiLaZrTaO (LLZTO) to fabricate a high-safety thin composite solid electrolyte membrane (20 μm) that is simple in process and facile in preparation conditions. The thin composite solid electrolyte film has better wrinkle resistance than ordinary polyethylene (PE) films and can guide the uniform deposition of lithium ions and suppress the growth of lithium dendrites. The thermal stability of the PE separator modified by double-coated nano-sized LLZTO is enhanced, which exhibits only 30 % shrinking percentage at 140 °C in comparison with 90 % of ordinary PE. The lithium symmetric cell with the nano-sized garnet solid-state electrolyte modified separator is relatively stable after 1000 h cycling at the current density of 1 mA cm. More importantly, after adding the adaptable electrolyte, the lithium metal battery assembled with modified separator can be maintained for 150 cycles (0.2C) stably with a high cathode active material loading of NCM811 (18 mg cm), and can maintain above 95 % Coulombic efficiency on average. Our work provides a pathway for the preparation of superior thermal stability and high safety garnet-based composite membranes towards lithium metal batteries.

Garnet Li6.75La3Zr1.75Ta0.25O12 solid-state electrolyte High safety Lithium dendrites Lithium metal batteries Modified separator

英语

第一

ENGINEERING

2-s2.0-85180374858

Scopus

1.Department of Materials Science and Engineering,School of Innovation and Entrepreneurship,Southern University of Science and Technology,Shenzhen,518055,China
2.BYD Company Limited,Shenzhen,518118,China
3.National Center for Applied Mathematics Shenzhen (NCAMS,Digital Economy Research Center—DeFin) and College of Business,Southern University of Science and Technology,Shenzhen,518055,China
4.Research Institute of Materials Science,South China University of Technology,Guangzhou,510640,China
5.Shenzhen SoliChem Technology Co. Ltd.,Shenzhen,518122,China
6.CALB Group Co. Ltd.,Changzhou,213200,China
7.ZTE Corporation,Shenzhen,518057,China

Yu，Kai,Zeng，Huipeng,Ma，Jun,et al. High-performance lithium metal batteries enabled by a nano-sized garnet solid-state electrolyte modified separator[J]. Chemical Engineering Journal,2024,480.

Yu，Kai.,Zeng，Huipeng.,Ma，Jun.,Jiang，Yidong.,Li，Huiyun.,...&Deng，Yonghong.(2024).High-performance lithium metal batteries enabled by a nano-sized garnet solid-state electrolyte modified separator.Chemical Engineering Journal,480.

Yu，Kai,et al."High-performance lithium metal batteries enabled by a nano-sized garnet solid-state electrolyte modified separator".Chemical Engineering Journal 480(2024).