Current density induced growth of Li15Si4 alloy in silicon-carbon anodes during first lithiation process

Gan, Chuanhai; Ye, Xiongbiao; Zhang, Sa; Chen, Juan; Wen, Weidong; Liu, Yingkuan; Peng, Dong‐Liang; Tang, Lizhi; Luo, Xuetao

doi:10.1016/j.est.2021.102930

Cited by 7 publications

(4 citation statements)

References 38 publications

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“…Figure b depicts the HETEM image of the P-SKW@C anode after 50 cycles, corresponding to the black box in Figure a. The lattice spacing of 0.21 nm on the (431) crystalline surface of the Li 3.75 Si alloy is particularly visible . The robust structural integrity of the electrode can be attributed to the porous nature of the P-SKW@C composite.…”

Section: Resultsmentioning

confidence: 99%

“…The lattice spacing of 0.21 nm on the (431) crystalline surface of the Li 3.75 Si alloy is particularly visible. 60 The robust structural integrity of the electrode can be attributed to the porous nature of the P-SKW@C composite. Additionally, the carbon layer plays a crucial role in enhancing Figure 10a,b illustrates the failure mechanisms of the SKW and P-SKW@C anodes, respectively.…”

Section: Resultsmentioning

confidence: 99%

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Scalable Synthesis of a Si/C Composite Derived from Photovoltaic Silicon Kerf Waste toward Anodes for High-Performance Lithium-Ion Batteries

Yang,

Li,

Chen

et al. 2024

Energy Fuels

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The solid waste from solar photovoltaic (PV) systems diverges from carbon neutrality targets and the core principles of clean energy. Herein, we present an innovative and cost-effective strategy to fabricate P-SKW@C as anode materials based on the natural properties of submicron silicon kerf waste (SKW) by increasing the surface oxide layer and combining the synergistic effects of magnesium thermal and acid leaching. In particular, the carbon layer establishes channels for electron and ion transport, thereby enhancing the conductivity of P-SKW@C and the mobility of lithium ions. The formation of pores by the synergistic effects of magnesium thermal and acid leaching provides buffer space to accommodate the volume changes in silicon, ensuring the structural integrity of the electrode. Specifically, the P-SKW@C anode exhibits superior rate performance, reaching 1006 mAh g −1 at 2 A g −1 , and an outstanding reversible capacity of 1103 mAh g −1 with the current density returning to 0.2 A g −1 . Furthermore, the P-SKW@C anode demonstrates a remarkable specific capacity of 905 mAh g −1 at 500 mA g −1 over 200 cycles. Notably, the assembled LiFePO 4 //P-SKW@C full cell maintains a stable capacity of 105.96 mAh g −1 and an energy density of 329.84 Wh kg −1 at 0.5 °C after 50 cycles. This work introduces a new strategy for recycling the SKW in a sustainable, economical, and environmentally friendly way, facilitating the integration of solid waste and energy storage.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Scalable Synthesis of a Si/C Composite Derived from Photovoltaic Silicon Kerf Waste toward Anodes for High-Performance Lithium-Ion Batteries

Yang,

Li,

Chen

et al. 2024

Energy Fuels

Self Cite

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“…with XRD data in Figure 3b. The cathodic peak observed at 0.15 V during the charging process can be assigned to the formation of the amorphous Li x Si phase during the Li insertion process [15]. Figure 4b shows the EIS curves of Si-P and de-FeSi-P for the comparison of the transportation properties of electrodes.…”

Section: Resultsmentioning

confidence: 99%

Low-cost porous silicon material based on fenton process assisted chemical etching and its application as anode for lithium-ion battery

Li,

Wen,

Wang

2024

J. Phys.: Conf. Ser.

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Nanostructured silicon-based materials are considered as one of the most promising alternatives for anode electrodes of lithium-ion batteries. Nevertheless, the relatively high cost and complexity of most present processes make them difficult to scale up. In this manuscript, we would like to introduce a porous anode prepared by Fenton reaction-assisted chemical etching of low-cost ferrosilicon in the mixed solution of hydrogen fluoride and hydrogen peroxide. The experimental results show that hierarchical structures containing both mesopores and micropores can be formed by this convenient room-temperature etching process and its electrochemical performance as the anode is comparable to that of commercial product. Furthermore, the low cost of ferrosilicon ($1200~1500/ton) compared with the silicon powder of industrial grade (~$3000/ton) traditionally used in Li-ion battery anode preparation also renders this method potential and feasible for large-scale production of Si-based anode materials.

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“…This degradation is primarily attributed to ICR, which tends to localize alloying reactions within distinct areas of the particles. 103,104 Such a localization leads to uneven and significant volumetric expansion, exacerbating mechanical stresses that accelerate particle fracture. 104 By contrast, adopting DCR offers a promising strategy to significantly improve the electrochemical reversibility.…”

Section: Comparison Between Icr and Dcrmentioning

confidence: 99%

Manipulating non-equilibrium diffusion-controlled reaction toward reversible alloying reactions in alkali ion batteries

Kim,

Cho,

Lyu

et al. 2024

Energy Environ. Sci.

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Current density induced growth of Li15Si4 alloy in silicon-carbon anodes during first lithiation process

Cited by 7 publications

References 38 publications

Scalable Synthesis of a Si/C Composite Derived from Photovoltaic Silicon Kerf Waste toward Anodes for High-Performance Lithium-Ion Batteries

Scalable Synthesis of a Si/C Composite Derived from Photovoltaic Silicon Kerf Waste toward Anodes for High-Performance Lithium-Ion Batteries

Low-cost porous silicon material based on fenton process assisted chemical etching and its application as anode for lithium-ion battery

Manipulating non-equilibrium diffusion-controlled reaction toward reversible alloying reactions in alkali ion batteries

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