期刊
NANO LETTERS
卷 22, 期 10, 页码 4223-4231出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.nanolett.2c01235
关键词
hierarchical confinement; zincophilic site; spatial confinement; dendrite-free; metallic Zn anode
类别
资金
- National Key RAMP
- D Program of China [2018YFE0201701, 2018YFA0209401]
- National Natural Science Foundation of China (NSFC) [52103308, 22109029]
- Qatar University [QUHI-CAS-21/22-1]
- Natural Science Foundation of Jiangsu Province [BK20210826]
- Natural Science Foundation of Shanghai [22ZR1403600]
- Fudan University [JIH2203010, IDH2203008/003]
- Postdoctoral Science Foundation of China [2021M690658]
- Talent Development Funding Project of Shanghai [2021030]
- Lvyang Jinfeng Plan for Excellent Doctor of Yangzhou City
A hierarchical confinement strategy using porous Co-embedded carbon cages is proposed to address the kinetics and stability issues of Zn capture in aqueous batteries. This strategy enables dendrite-free behavior with excellent kinetics and stable cycle life, pushing forward the next-generation high-performance ZABs.
Zn-based aqueous batteries (ZABs) have beenregarded as promising candidates for safe and large-scale energystorage in the post-Li era. However, kinetics and stabilityproblems of Zn capture cannot be concomitantly regulated,especially at high rates and loadings. Herein, a hierarchicalconfinement strategy is proposed to design zincophilic and spatialtraps through a host of porous Co-embedded carbon cages(denoted as CoCC). The zincophilic Co sites act as preferrednucleation sites with low nucleation barriers (within 0.5 mA hcm-2), and the carbon cage can further spatially confine Zn deposition (within 5.0 mA h cm-2). Theoretical simulations andin situ/ex situstructural observations reveal the hierarchical spatial confinement by the elaborated all-in-one network (within 12 mA hcm-2). Consequently, the elaborate strategy enables a dendrite-free behavior with excellent kinetics (low overpotential ofca.65mVat a high rate of 20 mA cm-2) and stable cycle life (over 800 cycles), pushing forward the next-generation high-performance ZABs
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