Citation: Ding Junfan, Xu Rui, Yan Chong, Xiao Ye, Liang Yeru, Yuan Hong, Huang Jiaqi. Integrated lithium metal anode protected by composite solid electrolyte film enables stable quasi-solid-state lithium metal batteries[J]. Chinese Chemical Letters, ;2020, 31(9): 2339-2342. doi: 10.1016/j.cclet.2020.03.015 shu

Integrated lithium metal anode protected by composite solid electrolyte film enables stable quasi-solid-state lithium metal batteries

Ding Junfan ^a,b,1 ,
Xu Rui ^a,b,1 ,
Yan Chong ^a,b ,
Xiao Ye ^a,b ,
Liang Yeru ^c ,
Yuan Hong ^a,b ,
Huang Jiaqi ^a,b,*,

a.
School of Materials Science & Engineering, Beijing Institute of Technology, Beijing 100081, China
b.
Advanced Research Institute of Multidisciplinary Science, Beijing Institute of Technology, Beijing 100081, China
c.
College of Materials and Energy, South China Agricultural University, Guangzhou 510642, China

jqhuang@bit.edu.cn

Received Date: 13 January 2020
Revised Date: 27 February 2020
Accepted Date: 1 March 2020
Available Online: 7 March 2020

Figures(4)

Lithium (Li) metal, possessing an extremely high theoretical specific capacity (3860 mAh/g) and the most negative electrode potential (-3.040 V vs. standard hydrogen electrode), is one the most favorable anode materials for future high-energy-density batteries. However, the poor cyclability and safety issues induced by extremely unstable interfaces of traditional liquid Li metal batteries have limited their practical applications. Herein, a quasi-solid battery is constructed to offer superior interfacial stability as well as excellent interfacial contact by the incorporation of Li@composite solid electrolyte integrated electrode and a limited amount of liquid electrolyte (7.5 μL/cm²). By combining the inorganic garnet Aldoped Li_6.75La₃Zr_1.75Ta_0.25O₁₂ (LLZO) with high mechanical strength and ionic conductivity and the organic ethylene-vinyl acetate copolymer (EVA) with good flexibility, the composite solid electrolyte film could provide sufficient ion channels, sustained interfacial contact and good mechanical stability at the anode side, which significantly alleviates the thermodynamic corrosion and safety problems induced by liquid electrolytes. This innovative and facile quasi-solid strategy is aimed to promote the intrinsic safety and stability of working Li metal anode, shedding light on the development of next-generation high-performance Li metal batteries.
- Lithium metal anodes,
- Composite electrolyte,
- Quasi-solid-state batteries,
- Lithium dendrites,
- Lean electrolyte
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