期刊
NANO ENERGY
卷 98, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.nanoen.2022.107326
关键词
Multidimensional nanoarchitecture; Ultrasmall nanodots; Porous carbon nanowires; Three-dimensional graphene; Sodium ion batteries
类别
资金
- National Natural Science Foundation of China [22102050, 51672172]
- China Postdoctoral Science Foundation [2021M690048]
- Basic and Applied Basic Research Foundation of Guangdong Province [2020A1515110770]
- Program of Shanghai Academic/Technology Research Leader [20XD1401800]
- Science and Technology Commission of Shanghai Municipality [19020501000]
A multidimensional porous anode was designed for sodium ion batteries, showing significant breakthroughs in sodium ion storage performance with high reversible capacity and superior long-term cycling performance. This electrode design strategy based on multidimensional nanoarchitecture sets a new benchmark for high-performance energy storage devices.
Sodium ion batteries (SIBs) are a low-cost and promising alternative to lithium ion batteries, however, due to the large sodium ion size (Na+ vs Li+: 1.02 angstrom vs 0.76 angstrom), high ion diffusion barrier and huge volume variation of electrode materials, it remains a challenge to achieve satisfactory Na+ storage performance. To address these issues, herein, we deliberately designed a multidimensional porous anode for SIBs, which was constructed by zero-dimensional (0D) ultrasmall CoSe2 nanodots confined in one-dimensional (1D) porous carbon nanowires (CNWs) and well encapsulated within three-dimensional (3D) graphene (3DG/CoSe2@CNWs). The fabricated 3DG/CoSe2@CNWs nanoarchitecture exhibits plentiful reactive sites, interconnected conductive network, abundant ion transport channels, and double protective structure. Thus, it showed enhanced Na+ storage performance with high reversible capacities (543 mA h g+1 at 0.1 A g+1) and superior long-term cycling performance with a capacity retention of 86.1% at 2 A g+1, and when coupled with 3D graphene/Prussian blue (3DG/ PB) cathodes, the full batteries also delivered enhanced electrochemical performance. Furthermore, its efficient Na+ storage mechanisms were proved by the reaction kinetics analysis and density functional theory calculations. Our work provides a new electrode design strategy based on multidimensional nanoarchitecture for highperformance energy storage devices.
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