Macroscopically uniform interface layer with Li+ conductive channels for high-performance Li metal batteries

Qian Chen, Binyin Gao, Zhilin Yang, Yong Li, QingWei Zhai, Yangyu Jia, Qiannan Zhang, Xiaokang Gu, Jinghan Zuo, Lei Wang, Tianshuai Wang, Pengbo Zhai (), Cheng Yang () and Yongji Gong ()
Additional contact information
Qian Chen: Yuhang District
Binyin Gao: Beihang University
Zhilin Yang: 1.Unit 63963 of PLA
Yong Li: Shanghai Institute of Space Power-Sources
QingWei Zhai: LTD
Yangyu Jia: Beihang University
Qiannan Zhang: Beihang University
Xiaokang Gu: Beihang University
Jinghan Zuo: Beihang University
Lei Wang: Beihang University
Tianshuai Wang: Northwestern Polytechnical University
Pengbo Zhai: Yuhang District
Cheng Yang: Shanghai Institute of Space Power-Sources
Yongji Gong: Yuhang District

Nature Communications, 2024, vol. 15, issue 1, 1-12

Abstract: Abstract The numerous grainboundaries solid electrolyte interface, whether naturally occurring or artificially designed, leads to non-uniform Li metal deposition and consequently results in poor full-battery performance. Herein, a lithium-ion selective transport layer is reported to achieve a highly efficient and dendrite-free lithium metal anode. The layer-by-layer assembled protonated carbon nitride nanosheets present uniform macroscopical structure without grainboundaries. The carbon nitride with ordered pores in basal plane provides high-speed lithium-ion transport channels with low tortuosity. Consequently, the assembled 324 Wh kg−1 pouch cell exhibits 300 stable cycles with a capacity retention of 90.0% and an average Coulombic efficiency up to 99.7%. The ultra-dense Li metal anode makes current collector-free anode possible, achieving high energy density and long cycle life of a 7 Ah cell (506 Wh kg−1, 160 cycles). Thus, it is proved that a macroscopically uniform interface layer with lithium-ion conductive channels could achieve Li metal battery with promising application potential.

Date: 2024
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DOI: 10.1038/s41467-024-54310-1

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