Controlled surface oxidation of mesoporous silicon microparticles to achieve a stable Si/SiOx anode for lithium-ion batteries

Kalidas, Nathiya; Shen, Xiaojing; Yuan, Minjuan; Zhao, Xiuyun; Lehto, Vesa‐Pekka

doi:10.1016/j.micromeso.2022.112243

Cited by 7 publications

(3 citation statements)

References 22 publications

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“…11b shows the high-resolution spectrum of the Si 2p orbital. It can be seen that the binding energy of pure SiO 2 is 104 eV while that of C/SiOx drops to 103 eV [52]. Fig.…”

Section: Structure Characterization Of the C/siox Aerogelsmentioning

confidence: 84%

The Microparticles SiOx Loaded on PAN-C Nanofiber as Three-Dimensional Anode Material for High-Performance Lithium-Ion Batteries

Wang¹,

Zhou²,

Zhang³

et al. 2023

Journal of Renewable Materials

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Three-dimensional C/SiOx nanofiber anode was prepared by polydimethylsiloxane (PDMS) and polyacrylonitrile (PAN) as precursors via electrospinning and freeze-drying successfully. In contrast to conventional carbon covering Si-based anode materials, the C/SiOx structure is made up of PAN-C, a 3D carbon substance, and SiOx loading steadily on PAN-C. The PAN carbon nanofibers and loaded SiOx from pyrolyzed PDMS give increased conductivity and a stable complex structure. When employed as lithium-ion batteries (LIBs) anode materials, C/SiOx-1% composites were discovered to have an extremely high lithium storage capacity and good cycle performance. At a current density of 100 mA/g, its reversible capacity remained at 761 mA/h after 50 charge-discharge cycles and at 670 mA/h after 200 cycles. The C/SiOx-1% composite aerogel is a particularly intriguing anode candidate for high-performance LIBs due to these appealing qualities.

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“…11b shows the high-resolution spectrum of the Si 2p orbital. It can be seen that the binding energy of pure SiO 2 is 104 eV while that of C/SiOx drops to 103 eV [52]. Fig.…”

Section: Structure Characterization Of the C/siox Aerogelsmentioning

confidence: 84%

The Microparticles SiOx Loaded on PAN-C Nanofiber as Three-Dimensional Anode Material for High-Performance Lithium-Ion Batteries

Wang¹,

Zhou²,

Zhang³

et al. 2023

Journal of Renewable Materials

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“…Table 3 [48,56,59,[62][63][64][65][66][67][68] shows the comparison of the electrochemical performance of CuNi-pSi and the previously reported Si-based anode. It can be found that CuNi-pSi displays excellent lithium storage performance in different studies.…”

Section: Resultsmentioning

confidence: 99%

Cu and Ni Co-Doped Porous Si Nanowire Networks as High-Performance Anode Materials for Lithium-Ion Batteries

Mi,

Luo,

Wang

et al. 2023

Materials

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Due to its extremely high theoretical mass specific capacity, silicon is considered to be the most promising anode material for lithium-ion batteries (LIBs). However, serious volume expansion and poor conductivity limit its commercial application. Herein, dealloying treatments of spray dryed Al-Si-Cu-Ni particles are performed to obtain a Cu/Ni co-doped Si-based anode material with a porous nanowire network structure. The porous structure enables the material to adapt to the volume changes in the cycle process. Moreover, the density functional theory (DFT) calculations show that the co-doping of Cu and Ni can improve the capture ability towards Li, which can accelerate the electron migration rate of the material. Based on the above advantages, the as-prepared material presents excellent electrochemical performance, delivering a reversible capacity of 1092.4 mAh g−1 after 100 cycles at 100 mA g−1. Even after 500 cycles, it still retains 818.7 mAh g−1 at 500 mA g−1. This study is expected to provide ideas for the preparation and optimization of Si-based anodes with good electrochemical performance.

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“…For mesoporous silicon microparticle anode, the maximum Li-ion storage capacity occurs at an oxygen content of 39 at. % [17]. Meanwhile, high-(4~5 N) and low-purity (2~3 N) nano-silicon samples prepared by chemical vapor deposition [18] and magnesiothermic reaction, respectively [19], demonstrate different oxygen content-dependent Li-ion storage properties.…”

Section: Introductionmentioning

confidence: 99%

Controlling Oxidation of Kerf Loss Silicon Waste Enabling Stable Battery Anode

Jiang,

He,

et al. 2024

Processes

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The recovery of massive kerf loss silicon waste into silicon anodes is an attractive approach to efficiently utilizing resources and protect the environment. Tens-of-nanometers-scale-thickness Si waste particles enable the high feasibility of high-rate Li-ion storage, but continuous oxidation leads to a gradual loss of electrochemical activity. Understanding the relationship between this oxidation and Li-ion storage properties is key to efficiently recovering silicon wastes into silicon anodes. However, corresponding research is rare. Herein, a series of silicon waste samples with different oxidation states were synthesized and their Li-ion storage characters were investigated. By analyzing their Li-ion storage properties and kinetics, we found that oxidation has absolutely detrimental effects on Li-ion storage performance, which is different to previously reported results of nano-silicon materials. The 2.5 wt.% Si provides a substantial initial discharge capacity of 3519 mAh/g at 0.5 A/g. The capacity retention of 2.5 wt.% Si is almost 70% after 500 cycles at 1 A/g. However, the 35.8 wt.% Si presents a modest initial discharge capacity of merely 170 mAh/g. Additionally, oxidation leads the Li-ion storage kinetics to transform from Li-ion diffusion-controlled to charge transfer-controlled behaviors. For kerf loss silicon waste with an oxygen content over 35.8 wt.%, Li-ion storage capability is lost due to a high charge transfer resistance and a low Li-ion diffusion coefficient.

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Controlled surface oxidation of mesoporous silicon microparticles to achieve a stable Si/SiOx anode for lithium-ion batteries

Cited by 7 publications

References 22 publications

The Microparticles SiOx Loaded on PAN-C Nanofiber as Three-Dimensional Anode Material for High-Performance Lithium-Ion Batteries

The Microparticles SiOx Loaded on PAN-C Nanofiber as Three-Dimensional Anode Material for High-Performance Lithium-Ion Batteries

Cu and Ni Co-Doped Porous Si Nanowire Networks as High-Performance Anode Materials for Lithium-Ion Batteries

Controlling Oxidation of Kerf Loss Silicon Waste Enabling Stable Battery Anode

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