Research Article

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2015, 8(11): 3535–3543

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https://doi.org/10.1007/s12274-015-0853-4

Hierarchical carbon nanocages as high-rate anodes for Li- and Na-ion batteries

Zhiyang Lyu, Lijun Yang, Dan Xu, Jin Zhao, Hongwei Lai, Yufei Jiang, Qiang Wu, Yi Li, Xizhang Wang (*), and Zheng Hu (*)

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Key Laboratory of Mesoscopic Chemistry of MOE, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210093, China

Keywords: hierarchical carbon nanocages, lithium-ion batteries, sodium-ion batteries, anode, high rate capability
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  • Abstract
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Novel hierarchical carbon nanocages (hCNCs) are proposed as high-rate anodes for Li- and Na-ion batteries. The unique structure of the porous network for hCNCs greatly favors electrolyte penetration, ion diffusion, electron conduction, and structural stability, resulting in high rate capability and excellent cyclability. For lithium storage, the corresponding electrode stores a steady reversible capacity of 970 mAh·g–1 at a rate of 0.1 A·g–1 after 10 cycles, and stabilizes at 229 mAh·g–1 after 10,000 cycles at a high rate of 25 A·g–1 (33 s for full-charging) while delivering a large specific power of 37 kW·kgelectrode –1 and specific energy of 339 Wh·kgelectrode –1. For sodium storage, the hCNC reaches a high discharge capacity of ~50 mAh·g–1 even at a high rate of 10 A·g–1.
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Hierarchical carbon nanocages as high-rate anodes for Li- and Na-ion batteries. Nano Res. 2015, 8(11): 3535–3543 https://doi.org/10.1007/s12274-015-0853-4

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