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Porous-carbon supported and fluorine-doped lamellar SnO2-ZnO composite as anode for high-rate and long-cycle lithium-ion batteries.

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Title: Porous-carbon supported and fluorine-doped lamellar SnO2-ZnO composite as anode for high-rate and long-cycle lithium-ion batteries.
Authors: Ma, Dandan1,2 (AUTHOR), Jiang, Chaokui1,2,3 (AUTHOR), Feng, Zuyong1,2 (AUTHOR) fengzuyong@foxmail.com, Xiong, Deping1,2 (AUTHOR), He, Miao1,2,4 (AUTHOR) herofate666@126.com
Source: Ceramics International. Apr2026:Part A, Vol. 52 Issue 9, p11867-11878. 12p.
Subjects: Lithium-ion batteries, Negative electrode, Composite materials, Fluorine compounds, Carbon-based materials
Abstract: Tin dioxide (SnO 2) has attracted considerable interest as a promising anode material for lithium-ion batteries (LIBs) due to its high theoretical specific capacity. However, the practical utilization of SnO 2 faces certain inherent limitations such as poor inherent electrical conductivity and substantial volume expansion during lithiation. To resolve these challenges, we developed a NaCl-template-assisted synthetic strategy to fabricate a three-dimensional (3D) porous lamellar SnO 2 -ZnO@C-F (SZCF) composite. The hierarchically porous architecture of the SZCF composite effectively increases the specific surface area, thereby facilitating rapid Li+ and electron transport. SnO 2 and ZnO nanoparticles are uniformly encapsulated within carbon nanosheets, which not only alleviates volume expansion of SnO 2 but also forms an efficient conductive network, reducing Li+ and electron diffusion resistance. Fluorine doping introduces additional electrochemically active sites, thereby enhancing charge storage capability. Consequently, the 3D porous lamellar SnO 2 -ZnO@C-F composite as anode for LIBs delivers an excellent capacity (963.6 mAh g−1 at 0.2 A g−1 after 200 cycles) and long-term cycling performance (750.2 mAh g−1 at 1.0 A g−1 after 2000 cycles). In addition, it has also outstanding rate capability, reaching a capacity of 507.3 mAh g−1 even at a high current density of 5 A g−1. These findings clearly demonstrate the great potential of the 3D porous lamellar SnO 2 -ZnO@C-F composite as an outstanding anode material for next-generation lithium-ion batteries. [Display omitted] [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
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Abstract:Tin dioxide (SnO 2) has attracted considerable interest as a promising anode material for lithium-ion batteries (LIBs) due to its high theoretical specific capacity. However, the practical utilization of SnO 2 faces certain inherent limitations such as poor inherent electrical conductivity and substantial volume expansion during lithiation. To resolve these challenges, we developed a NaCl-template-assisted synthetic strategy to fabricate a three-dimensional (3D) porous lamellar SnO 2 -ZnO@C-F (SZCF) composite. The hierarchically porous architecture of the SZCF composite effectively increases the specific surface area, thereby facilitating rapid Li+ and electron transport. SnO 2 and ZnO nanoparticles are uniformly encapsulated within carbon nanosheets, which not only alleviates volume expansion of SnO 2 but also forms an efficient conductive network, reducing Li+ and electron diffusion resistance. Fluorine doping introduces additional electrochemically active sites, thereby enhancing charge storage capability. Consequently, the 3D porous lamellar SnO 2 -ZnO@C-F composite as anode for LIBs delivers an excellent capacity (963.6 mAh g−1 at 0.2 A g−1 after 200 cycles) and long-term cycling performance (750.2 mAh g−1 at 1.0 A g−1 after 2000 cycles). In addition, it has also outstanding rate capability, reaching a capacity of 507.3 mAh g−1 even at a high current density of 5 A g−1. These findings clearly demonstrate the great potential of the 3D porous lamellar SnO 2 -ZnO@C-F composite as an outstanding anode material for next-generation lithium-ion batteries. [Display omitted] [ABSTRACT FROM AUTHOR]
ISSN:02728842
DOI:10.1016/j.ceramint.2026.01.344