Journal
NANO ENERGY
Volume 87, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.nanoen.2021.106214
Keywords
Negatively charged polymeric interphase; In-situ polymerization; 2,3,7,8-tetrakis((trimethylsilyl)ethynyl)pyrazino[2,3-g]quinoxaline-5,10-dione; Li metal anode
Categories
Funding
- National Natural Science Foundation of China, China [21772123, 51502173, 21761142011]
- 111 Innovation and Talent Recruitment Base on Photochemical and Energy Materials, China [D18020]
- NSF from Shanghai Government, China [18JC1412900]
- Shanghai Engineering Research Center of Green Energy Chemical Engineering, China [18DZ2254200]
- Shanghai Sailing Program, China [19YF1436600]
Ask authors/readers for more resources
Coating Li metal anode with a negatively charged artificial solid electrolyte interphase (ASEI) can stabilize the Li-metal anode and provide a highly uniform surface potential distribution, which may improve safety and durability in practical applications.
Li metal anode (LMA) for practical Li-metal batteries suffers from safety hazards and capacity deterioration caused by its high reactivity and infinite volume change. Herein, a stable LMA with highly uniform surface potential distribution was demonstrated by coating Li with a negatively charged artificial solid electrolyte interphase (ASEI), which is formed by spontaneous in-situ polymerization of 2,3,7,8-tetrakis((trimethylsilyl) ethynyl)pyrazino[2,3-g]quinoxaline-5,10-dione (PPQ) at room temperature. As an ion-transport regulator, such an ASEI with negatively charged moieties provides preferential Li-ion transport with high Li-ion transference number (t(Li)(+) = 0.74). As a robust artificial layer, the PPQ-stabilized Li (PPQ-Li) maintains high mechanical strength (Young's modulus of 7.39 GPa) after being immersed in electrolyte, which readily suppresses formation of hazardous Li dendrites and diminishes parasitic reactions on LMA, leading to dendrite-free morphology after long-term Li stripping-plating tests. Such a multi-functional interphase could potentially promote more tailorable coating designs for practically durable LMA.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available