期刊
ACS APPLIED MATERIALS & INTERFACES
卷 7, 期 14, 页码 7497-7504出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.5b00421
关键词
binder-free; lithium-ion battery; Si; electrophoretic deposition; 3D porous structure
资金
- National High Technology Research and Development Program of China [2012AA110204]
- National Natural Science Foundation of China [21321062]
- Key Project of Science and Technology of Xiamen [2013H6022]
A binder-free silicon (Si) based electrode for lithium-ion battery was fabricated in an organic solvent through one-step electrophoretic deposition (EPD). The nanosized Si and acetylene black (AB) particles were bonded tightly together to form a homogeneous co-deposited film with 3D porous structure through the EPD process. The 3D porous structure provides buffer spaces to alleviate the mechanical stress due to silicon volume change during the cycling and improves lithium-ion conductivity by shortening ion diffusion length and better ion conducting pathway. The electrode prepared with 5 s deposition duration shows the best cycling performance among electrodes fabricated by EPD method, and thus, it was selected to be compared with the silicon electrode prepared by the conventional method. Our results demonstrate that the Si nanoparticle electrode prepared through EPD exhibits smaller cycling capacity decay rate and better rate capability than the electrode prepared by the conventional method.
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