Scalable synthesis of Si nanowires interconnected SiOx anode for high performance lithium-ion batteries

Shen, Chengxu; Fu, Rusheng; Guo, Huijuan; Wu, Yongkang; Fan, Chongzhao; Xia, Yonggao; Liu, Zhaoping

doi:10.1016/j.jallcom.2018.12.291

Cited by 49 publications

(17 citation statements)

References 36 publications

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“…Many efforts have been directed toward developing silicon/carbon composites that can buffer these volumetric changes, enhancing the cycle performance of the cells [18,35]. The use of silicon oxide (SiO x ) instead of Si can also be a good alternative; even if its capacity is lower (1200-1500 mAh•g −1 ) [36,37], it undergoes a lower volumetric expansion and can be added in higher fractions in the anode formulation [38].…”

Section: Discussionmentioning

confidence: 99%

Insights into the Electrochemical Performance of 1.8 Ah Pouch and 18650 Cylindrical NMC:LFP|Si:C Blend Li-ion Cells

et al. 2022

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Silicon has become an integral negative electrode component for lithium-ion batteries in numerous applications including electric vehicles and renewable energy sources. However, its high capacity and low cycling stability represent a significant trade-off that limits its widespread implementation in high fractions in the negative electrode. Herein, we assembled high-capacity (1.8 Ah) cells using a nanoparticulate silicon–graphite (1:7.1) blend as the negative electrode material and a LiFePO4–LiNi0.5Mn0.3Co0.2O2 (1:1) blend as the positive electrode. Two types of cells were constructed: cylindrical 18650 and pouch cells. These cells were subjected both to calendar and cycling aging, the latter exploring different working voltage windows (2.5–3.6 V, 3.6–4.5 V, and 2.5–4.5 V). In addition, one cell was opened and characterised at its end of life by means of X-ray diffraction, scanning electron microscopy, and further electrochemical tests of the aged electrodes. Si degradation was identified as the primary cause of capacity fade of the cells. This work highlights the need to develop novel strategies to mitigate the issues associated with the excessive volumetric changes of Si.

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Section: Discussionmentioning

confidence: 99%

Insights into the Electrochemical Performance of 1.8 Ah Pouch and 18650 Cylindrical NMC:LFP|Si:C Blend Li-ion Cells

et al. 2022

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“…However, loading of active materials on electrodes prepared by traditional ways is usually lower than 3 mg cm –2 , resulting in low area capacity of batteries. , The carbon matrix having high electronic conductivity and light-weight porosity is an impeccable choice for current collectors of high specific area-capacity anodes. , It is suggested that a cross-linking agent such as cotton cellulose and carbon nanotubes (CNTs) with oxygen-containing groups is very beneficial to form a flexible and porous matrix during heat treatment. , For constructing the high area capacity GeS 2 -based anode, a hypothesis was proposed: if GeS 2 /C was mixed with cotton cellulose and CNTs to form a slurry and then the slurry was pasted on a smooth base, followed by drying and heat treatment, the flexible GeS 2 /C electrode will be obtained.…”

Section: Introductionmentioning

confidence: 99%

“…However, loading of active materials on electrodes prepared by traditional ways is usually lower than 3 mg cm −2 , resulting in low area capacity of batteries. 13,14 The carbon matrix having high electronic conductivity and light-weight porosity is an impeccable choice for current collectors of high specific areacapacity anodes. 15,16 It is suggested that a cross-linking agent such as cotton cellulose and carbon nanotubes (CNTs) with oxygen-containing groups is very beneficial to form a flexible and porous matrix during heat treatment.…”

Section: Introductionmentioning

confidence: 99%

Confining Nano-GeS₂ in Cross-Linked Porous Carbon Networks for High-Performance and Flexible Li-Ion Battery Anodes

Feng

Liu

et al. 2021

ACS Appl. Energy Mater.

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As anode materials for lithium-ion batteries (LiBs), GeS 2 has attracted considerable attention owing to its high theoretical capacity. Nevertheless, pulverization of GeS 2 during the lithiation/delithiation process impedes its practical applications. Hybrid cross-linking with the second phase material is an effective strategy to improve the charge/ discharge cycling performance. Herein, a high-capacity, long cycle-life nano-GeS 2 /carbon (GeS 2 /C) composite was facilely synthesized via the solid-state ball milling reaction. GeS 2 /C was then used to construct the three-dimensional (3D) flexible electrode. In this way, the flexible electrode with nano-GeS 2 /C particles confining in porous carbon networks exhibited improved reversible capacity and cycling performance, thanks to the unique confinement cellular structure. For instance, the flexible electrode with ∼500 μm thickness delivered capacities of ∼991, ∼888, ∼737, and ∼604 mA h g −1 at 0.1, 0.2, 0.5, and 1 A g −1 , respectively. Upon stacking into two layers of the GeS 2 /C flexible electrode, the increased thickness displayed no effects on its diffuse-controlled capacity ratio and Li + diffusion coefficient. This work provides a new strategy to stabilize germanium chalcogenides for LiB anodes with enhanced performance and sheds light on the preparation of other types of 3D flexible electrodes.

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“…Most of these studies have used either innovative electrode structures or silicon-based composite materials. Improvements have been made by reducing the Si grain size, controlling crystallization, , forming alloys/composites with other elements, − carbon coating, − etc. A great amount of effort is still being applied to propose practical solutions for commercialization and to improve performance further.…”

Section: Introductionmentioning

confidence: 99%

Si(CO)_y Negative Electrodes for Li-Ion Batteries

et al. 2021

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Si(CO) y (0 ≤ y ≤ 0.43) alloys were synthesized by reactive gas milling silicon in CO2 at room temperature. Silicon reacts with CO2 rapidly during milling, incorporating C and O in a 1:1 ratio to form alloys consisting of Si nanograins dispersed in an amorphous Si–O–C matrix. The capacity behavior of these alloys suggests the formation of inactive SiC and Li4SiO4 during the first lithiation. This implies that such alloys can have significantly greater initial coulombic efficiency (ICE) than SiO x at any given gravimetric or volumetric capacity.

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Scalable synthesis of Si nanowires interconnected SiOx anode for high performance lithium-ion batteries

Cited by 49 publications

References 36 publications

Insights into the Electrochemical Performance of 1.8 Ah Pouch and 18650 Cylindrical NMC:LFP|Si:C Blend Li-ion Cells

Insights into the Electrochemical Performance of 1.8 Ah Pouch and 18650 Cylindrical NMC:LFP|Si:C Blend Li-ion Cells

Confining Nano-GeS₂ in Cross-Linked Porous Carbon Networks for High-Performance and Flexible Li-Ion Battery Anodes

Si(CO)_y Negative Electrodes for Li-Ion Batteries

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Scalable synthesis of Si nanowires interconnected SiOx anode for high performance lithium-ion batteries

Cited by 49 publications

References 36 publications

Insights into the Electrochemical Performance of 1.8 Ah Pouch and 18650 Cylindrical NMC:LFP|Si:C Blend Li-ion Cells

Insights into the Electrochemical Performance of 1.8 Ah Pouch and 18650 Cylindrical NMC:LFP|Si:C Blend Li-ion Cells

Confining Nano-GeS2 in Cross-Linked Porous Carbon Networks for High-Performance and Flexible Li-Ion Battery Anodes

Si(CO)y Negative Electrodes for Li-Ion Batteries

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Product

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Confining Nano-GeS₂ in Cross-Linked Porous Carbon Networks for High-Performance and Flexible Li-Ion Battery Anodes

Si(CO)_y Negative Electrodes for Li-Ion Batteries