Journal
JOURNAL OF POWER SOURCES
Volume 535, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.jpowsour.2022.231444
Keywords
CoSe (2) anodes; N-doped carbon nanotubes; Porous structure; Dual carbon protection; Sodium ion batteries
Funding
- National Natural Science Foundation of China [52104291, 51874079, 51804035, 11775226]
- Natural Science Foundation of Hebei Province [E2021501029, E2018501091, E2020501001]
- Hebei Province Key Research and Development Plan Project [19211302D]
- Fundamental Research Funds for the Central Universities [N2123035, N2023040]
- Natural Science Foundation of Liaoning Province [2019-MS-110]
- Research Project on the Distribution of Heavy Metals in Soil and Comprehensive Utilization Technology of Tailings in Typical Iron Tailing Reservoir Areas of Hebei Province [802060671901]
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A hierarchical peapod-like nanorod material was developed as an ideal anode material for sodium-ion batteries. It exhibits low cost, considerable reaction kinetics, and good structural stability, resulting in excellent energy storage performance.
Engineering ideal anode materials with low cost, considerable reaction kinetics and good structural stability are urgently needed for sodium-ion batteries (SIBs) toward large-scale applications. Here, a hierarchical peapod-like nanorod consisting of CoSe2/N-doped carbon (NC) core-shell nanoparticles (NPs) embedded into onedimensional (1D) N-doped carbon nanotubes (CoSe2/NC@NCNTs) with inner void space is developed and fabricated by a self-template, dopamine-coating, and succeeding selenization strategy. In the cleverly designed CoSe2/NC@NCNTs composite, the 1D peapod-like structure provides high mechanical strength and allows for fast mass transport/electron transfer. The external NCNTs and inner void space can effectively accommodate volumetric undulation and restrain the aggregation of CoSe2 NPs. Based on these advantages, the CoSe2/ NC@NCNTs electrode exhibits excellent comprehensive sodium storage performance, e.g., good rate capability (386.3 mAh g(-1) at 10.0 A g-1) and high cycling stability (394.2 mAh g(-1) up to 4500 loops at 5.0 A g(-1)). Moreover, the SIB full cells (Na3V2(PO4)(3)@C cathodes vs CoSe2/NC@NCNTs anodes) can achieve a reversible
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