TY - JOUR
T1 - Remarkable performance improvement of inexpensive ball-milled Si nanoparticles by carbon-coating for Li-ion batteries
AU - Kasukabe, Takatoshi
AU - Nishihara, Hirotomo
AU - Iwamura, Shinichiroh
AU - Kyotani, Takashi
N1 - Funding Information:
We thank Dr. M. Okai for his kind advice about Si production and the reuse of Si swarf to LIBs. We thank Daicel Fine Chem. Ltd. and JSR Co. for kindly supplying carboxymethylcellulose and styrene butadiene rubber, respectively. This work was supported partly by the Ministry of Education, Culture, Sports, Science, and Technology , Grant-in-Aid for Scientific Research on the Innovative Areas: “Fusion Materials” (Area no. 2206), 25107705 and also by the Nano-Macro Materials, Devices and System Research Alliance and by Network Joint Research Center for Materials and Devices .
Publisher Copyright:
© 2016 Elsevier B.V. All rights reserved.
PY - 2016/7/1
Y1 - 2016/7/1
N2 - Si nanoparticles prepared by ball-milling (BM-Si) are expected as practical negative-electrode materials for lithium-ion batteries, but their performance is much lower than those of more expensive Si nanomaterials, such as chemical-vapor-deposition derived Si nanoparticles (CVD-Si) having a tight network structure. It is found that carbon-coating of aggregations of BM-Si forms a quasi-network structure, thereby making the performance comparable to that of CVD-Si under capacity restriction (to 1500 mAh g-1). In this case, the structural transition of BM-Si during charge/discharge cycling is characterized by the formation of a specific 'wrinkled structure', which is very similar to that formed in CVD-Si.
AB - Si nanoparticles prepared by ball-milling (BM-Si) are expected as practical negative-electrode materials for lithium-ion batteries, but their performance is much lower than those of more expensive Si nanomaterials, such as chemical-vapor-deposition derived Si nanoparticles (CVD-Si) having a tight network structure. It is found that carbon-coating of aggregations of BM-Si forms a quasi-network structure, thereby making the performance comparable to that of CVD-Si under capacity restriction (to 1500 mAh g-1). In this case, the structural transition of BM-Si during charge/discharge cycling is characterized by the formation of a specific 'wrinkled structure', which is very similar to that formed in CVD-Si.
KW - LIBs
KW - Si anodes
KW - Si/C composites
KW - Structure change
KW - Transmission electron microscopy
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U2 - 10.1016/j.jpowsour.2016.04.050
DO - 10.1016/j.jpowsour.2016.04.050
M3 - Article
AN - SCOPUS:84963725410
SN - 0378-7753
VL - 319
SP - 99
EP - 103
JO - Journal of Power Sources
JF - Journal of Power Sources
ER -
