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| Solution-phase synthesis of bimetallic (Sn/Ni) doped porous silicon microspheres with electrochemical lithium storage |
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| Abstract: Novel bimetallic (Sn/Ni) doped porous silicon microspheres (pSi@SnNi) were prepared by a simple chemical deposition method, using an inexpensive silicon-aluminum alloy precursor. The three-dimensional porous structure of pSi@SnNi composites can buffer the huge volume expansion of silicon in the lithiation process and increase lithium storage active sites. The deposition and doping of bimetallic (Sn/Ni) may improve the electronic conductivity of Si as well as enhance the structural stability of pSi. Profiting from the unique composition and microstructure, the pSi@SnNi composite with moderate Sn/Ni content showed large reversible lithium storage capacity (2 651.7 mAh·g-1 at 0.1 A·g-1), high electrochemical cycling stability (1 139 mAh·g-1 after 400 cycles at 1 A·g-1), and excellent rate capability (1 235.8 mAh·g-1 at 2.5 A·g-1). |
| Keywords: lithium-ion batteries silicon-based anode porous structure bimetallic doping chemical replacement |
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| XIAO Zi-Wei,XU Ze-Yu,WANG Jian-Ming.Solution-phase synthesis of bimetallic (Sn/Ni) doped porous silicon microspheres with electrochemical lithium storage[J].Chinese Journal of Inorganic Chemistry,2023,39(6):1031-1041. |
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