A Highly stable host for lithium metal anode enabled by Li9Al4-Li3N-AlN structure

Journal Article · Wed May 01 00:00:00 EDT 2019 · Nano Energy

DOI:https://doi.org/10.1016/j.nanoen.2019.02.033· OSTI ID:1523432

Peng, Zhe ^[1]; Ren, Feihong ^[1]; Yang, Shanshan ^[1]; Wang, Muqin ^[1]; Sun, Jie ^[1]; Wang, Deyu ^[2]; Xu, Wu  ^[3]; Zhang, Jiguang  ^[3]

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1. Chinese Academy of Sciences
2. CHINESE ACADEMY OF SCIENCES
3. BATTELLE (PACIFIC NW LAB)

Lithium (Li) metal battery is one of the ideal candidates for the next-generation high-energy-density batteries, but its practical application is still plagued by its large volume change, low coulombic efficiency (CE), and safety issues related to dendrite growth. This work describes a potential solution to these issues using a cross-linked Li9Al4-Li3N-AlN (LLA) structure as a stable host for Li metal anode. The in situ-formed uniform Li9Al4 and Li3N sites on AlN nano-clusters can suppress dendrite growth during the Li plating/stripping process. The intrinsic lithiophilicity of Li9Al4 sites with adjacent Li3N attracts Li+ ions for fast migration and uniform plating/stripping. These unique features lead to dimensional stability of Li@LLA composite anodes (1540 mAh g-1 and 1600 mAh cm-3). High-rate, high-capacity cycling of Li metal anodes has been maintained with a CE of ~98% in carbonate-based electrolytes. High capacity retention of 90.1% is achieved for a Li@LLA||LiNi0.8Co0.1Mn0.1O2 full cell at the 200th cycle. Therefore, the LLA structure with a simple fabrication process could be a promising candidate to enhance the safety of next-generation Li metal batteries.

• Research Organization: Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-76RL01830
• OSTI ID: 1523432
• Report Number(s): PNNL-SA-139672
• Journal Information: Nano Energy, Vol. 59
• Country of Publication: United States
• Language: English