Journal article
Interconnected Two‐dimensional Arrays of Niobium Nitride Nanocrystals as Stable Lithium Host
Batteries & supercaps, v 4(1)
Jan 2021
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
The cycle life of rechargeable lithium (Li)‐metal batteries is mainly restrained by dendrites growth on the Li‐metal anode and fast depletion of the electrolyte. Here, we report on a stable Li‐metal anode enabled by interconnected two‐dimensional (2D) arrays of niobium nitride (NbN) nanocrystals as the Li host, which exhibits a high Coulombic efficiency (>99 %) after 500 cycles. Combining theoretical and experimental analysis, it is inferred that this performance is due to the intrinsic properties of interconnected 2D arrays of NbN nanocrystals, such as thermodynamic stability against Li‐metal, high Li affinity, fast Li+ migration, and Li+ transport through the porous 2D nanosheets. Coupled with a lithium nickel–manganese–cobalt oxide cathode, full Li‐metal batteries were built, which showed high cycling stability under practical conditions – high areal cathode loading ≥4 mAh cm−2, low negative/positive (N/P) capacity ratio of 3, and lean electrolyte weight to cathode capacity ratio of 3 g Ah−1. Our results indicate that transition metal nitrides with a rationally designed structure may alleviate the challenges of developing dendrite‐free Li‐metal anodes.
2D host: A stable Li‐metal anode is enabled by interconnected 2D arrays of niobium nitride nanocrystals as Li host with a high Coulombic efficiency (>99 %) after 500 cycles. Coupled with lithium nickel–manganese–cobalt oxide, the full Li‐metal battery shows long‐term cycling stability under practical conditions.
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Details
- Title
- Interconnected Two‐dimensional Arrays of Niobium Nitride Nanocrystals as Stable Lithium Host
- Creators
- Xu Xiao - Drexel UniversityWei Yao - Yancheng Institute of TechnologyJun Tang - Drexel UniversityChuanfang Liu - Jilin UniversityRuqian Lian - Jilin UniversityPatrick Urbankowski - Drexel UniversityMark Anayee - Drexel UniversityShijie He - Drexel UniversityJianmin Li - Drexel UniversityHao Wang - Drexel UniversityYu Gao - Jilin UniversityYingjin Wei - Jilin UniversityYury Gogotsi - Drexel University
- Publication Details
- Batteries & supercaps, v 4(1)
- Publisher
- Wiley
- Number of pages
- 6
- Grant note
- U.S. National Science Foundation (DMR-1310245) U.S. National Science Foundation Graduate Research Fellowship (DGE-1646737) National Natural Science Foundation of China (51972140)
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering
- Web of Science ID
- WOS:000581722100001
- Scopus ID
- 2-s2.0-85101006726
- Other Identifier
- 991014969759404721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Electrochemistry
- Materials Science, Multidisciplinary