Interfacial engineering of Si anodes by confined doping of Co toward high initial coulombic efficiency

Han, Yuanyuan; Fu, Haoyu; Chen, Guihuan; Wang, Xiaoshan; Zhao, Yue; Sui, Xiang; Zhao, Zhiqiang; Sang, Xiancheng; Li, Qinghao; Li, Qiang

doi:10.1039/d3cc05365b

Cited by 6 publications

(1 citation statement)

References 42 publications

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“…Consequently, intensive efforts in recent years have focused on exploring alternative anode materials with higher capacity. Several materials, such as silicon , and silicon suboxide (SiO x , x < 2), , have been explored as potential LIB anode materials for next-generation lithium-ion batteries. In particular, SiO x has a superior cycling capacity as an anode material and is easy to synthesize at low cost, although the volume change during charging and discharging is less than that of Si .…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Organopolysilazane Nanoparticles as Lithium-Ion Battery Anodes with Superior Electrochemical Performance via the Two-Step Stöber Method

Xia,

Zhang,

et al. 2024

ACS Appl. Mater. Interfaces

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The Stöber method, a widely utilized sol–gel technique, stands as a green and reliable approach for preparing nanostructures on a large scale. In this study, we employed an enhanced Stöber method to synthesize organopolysilazane nanoparticles (OPSZ NPs), utilizing polysilazane oligomers as the primary precursor material and ammonia as the catalytic agent. By implementing a two-step addition process, control over crucial parameters facilitated the regulation of the nanoparticle size. Generally, maintaining relatively low concentrations of organopolysilazane and catalyst while adjusting the water/acetonitrile ratio can effectively enhance the surface energy of the organopolysilazane, resulting in the uniform formation of small spherical particles. The average particle size of the synthesized OPSZ NPs is about 140 nm, which were monodispersed and characterized by scanning electron microscopy, transmission electron microscopy, and dynamic light scattering. Furthermore, the composition of OPSZ NPs after pyrolysis was confirmed as SiC2.054N0.206O1.631 with 5.44 wt % free carbon structure by X-ray diffraction and energy-dispersive X-ray spectroscopy. Notably, the electrochemical performance assessment of SiCNO NPs as potential electrode materials for lithium-ion batteries exhibited promising outcomes. Specifically, at 1 A g–1 current density, the specific capacity is 585.45 mA h g–1 after 400 cycles, and the minimum capacity attenuation per cycle is only 0.1076 mA h g–1 (0.0172% of the original capacity), which indicates excellent energy storage capacity and cycle stability. In summary, this research contributes to the development of advanced anode materials for next-generation energy storage systems, marking a stride toward sustainable energy solutions.

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Section: Introductionmentioning

confidence: 99%

Synthesis of Organopolysilazane Nanoparticles as Lithium-Ion Battery Anodes with Superior Electrochemical Performance via the Two-Step Stöber Method

Xia,

Zhang,

et al. 2024

ACS Appl. Mater. Interfaces

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show abstract

Encapsulating Si particles in multiple carbon shells with pore-rich for constructing free-standing anodes of lithium storage

Du,

Huang,

Chen

et al. 2024

Chinese Chemical Letters

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One-pot synthesis of interconnected carbon-coated silicon nanosheets from clay minerals for high-performance lithium-ion battery anodes

Wei,

Chen,

Zhu

et al. 2024

Applied Clay Science

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Interfacial engineering of Si anodes by confined doping of Co toward high initial coulombic efficiency

Abstract: In situ magnetometry is used to verify the formation and reveal the stabilizer role of Si/Si–Co multilayer film. The resultant Si/Si–Co anode delivers an initial coulomb efficiency of 93.4% at 1 A g−1 and 85.07% capacity retention after 100 cycles.

Cited by 6 publications

References 42 publications

Synthesis of Organopolysilazane Nanoparticles as Lithium-Ion Battery Anodes with Superior Electrochemical Performance via the Two-Step Stöber Method

Synthesis of Organopolysilazane Nanoparticles as Lithium-Ion Battery Anodes with Superior Electrochemical Performance via the Two-Step Stöber Method

Encapsulating Si particles in multiple carbon shells with pore-rich for constructing free-standing anodes of lithium storage

One-pot synthesis of interconnected carbon-coated silicon nanosheets from clay minerals for high-performance lithium-ion battery anodes

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