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

IF 14.7 1区 综合性期刊 Q1 MULTIDISCIPLINARY SCIENCES Nature Communications Pub Date : 2024-11-20 DOI:10.1038/s41467-024-54310-1
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, Yongji Gong
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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.

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用于高性能锂金属电池的具有 Li+ 导电通道的宏观均匀界面层
无论是自然形成的还是人为设计的,大量晶界固体电解质界面都会导致锂金属沉积不均匀,从而导致电池性能低下。本文报告了一种锂离子选择性传输层,以实现高效且无树枝状突起的锂金属负极。逐层组装的质子化氮化碳纳米片呈现出无晶界的均匀宏观结构。氮化碳基面上的有序孔隙提供了低迂回度的高速锂离子传输通道。因此,组装好的 324 Wh kg-1 袋式电池可稳定循环 300 次,容量保持率达 90.0%,平均库仑效率高达 99.7%。超致密锂金属阳极使无集电极成为可能,从而实现了 7 Ah 电池的高能量密度和长循环寿命(506 Wh kg-1,160 次循环)。由此证明,具有锂离子导电通道的宏观均匀界面层可实现金属锂电池,具有广阔的应用前景。
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来源期刊
Nature Communications
Nature Communications Biological Science Disciplines-
CiteScore
24.90
自引率
2.40%
发文量
6928
审稿时长
3.7 months
期刊介绍: Nature Communications, an open-access journal, publishes high-quality research spanning all areas of the natural sciences. Papers featured in the journal showcase significant advances relevant to specialists in each respective field. With a 2-year impact factor of 16.6 (2022) and a median time of 8 days from submission to the first editorial decision, Nature Communications is committed to rapid dissemination of research findings. As a multidisciplinary journal, it welcomes contributions from biological, health, physical, chemical, Earth, social, mathematical, applied, and engineering sciences, aiming to highlight important breakthroughs within each domain.
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