NDLI: Three-dimensional porous bowl-shaped carbon cages interspersed with carbon coated Ni–Sn alloy nanoparticles as anode materials for high-performance lithium-ion batteries

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Three-dimensional porous bowl-shaped carbon cages interspersed with carbon coated Ni–Sn alloy nanoparticles as anode materials for high-performance lithium-ion batteries

Back cover

New Journal of Chemistry Vol -39

New Journal of Chemistry Vol -29

New Journal of Chemistry Vol -0

Three-dimensional porous bowl-shaped carbon cages interspersed with carbon coated Ni–Sn alloy nanoparticles as anode materials for high-performance lithium-ion batteries

Content Provider	Royal Society of Chemistry (RSC)
Author	Shi, Chunsheng Wang, Dan Wang, Zhiyuan Liu, Yanguo Qi, Xiwei Bao, Shuo He, Chunnian Zhao, Naiqin Luo, Shaohua
Copyright Year	2017
Abstract	The structural damage induced by huge volume change during lithiation/delithiation results in poor cycle stability of tin-based anode materials, which becomes the major obstacle to their practical application. In this work, we fabricated three-dimensional (3D) porous bowl-shaped carbon cages interspersed with carbon coated Ni–Sn alloy nanoparticles (Ni3Sn2 and Ni3Sn4; 10–30 nm) by a freeze-drying method with self-assembled NaCl as a template followed by annealing. Both Ni3Sn2/C and Ni3Sn4/C exhibit excellent electrochemical performance as anode materials for lithium-ion batteries. In particular, the Ni3Sn4/C nanocomposites exhibit superior rate capability (735, 661, 622, 577, 496, and 377 mA h g−1 at 0.1, 0.2, 0.5, 1, 2, and 5 A g−1, respectively) and excellent cycling stability (568 mA h g−1 at 0.5 A g−1 for the second cycle and gradually increased to 732 mA h g−1 after 200 cycles). The superior electrochemical performance is attributed to the synergetic effect of Ni–Sn alloy nanoparticles and 3D porous bowl-shaped carbon networks. The uniformly embedded Ni–Sn alloy nanoparticles can effectively alleviate the absolute stress/strain and shorten the Li+ diffusion path, and Ni in the Ni–Sn alloy acts as a buffer to suppress the volume expansion. Moreover, the 3D bowl-shaped carbon networks with high conductivity can provide abundant space for volume expansion, suppress the agglomeration of Ni–Sn nanoparticles, ensure the structural integrity, and facilitate lithium-ion diffusion as well as electron transportation.
Starting Page	393
Ending Page	402
Page Count	10
File Format	HTM / HTML PDF
ISSN	11440546
Volume Number	41
Issue Number	1
Journal	New Journal of Chemistry
DOI	10.1039/c6nj02458k
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Lithium-ion battery Anode Electrochemistry Diffusion Carbon Freeze-drying Three-dimensional space Nucleic acid thermodynamics
Content Type	Text
Resource Type	Article
Subject	Chemistry Materials Chemistry Catalysis

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