A scalable silicon/graphite anode with high silicon content for high-energy lithium-ion batteries

Yan, Zhilin; Yi, Si; Li, Xingda; Jiang, Jingwei; Yang, Deren; Du, Ning

doi:10.1016/j.mtener.2022.101225

Cited by 24 publications

(11 citation statements)

References 35 publications

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“…A multirate cyclic voltammetry test was performed to acquire a better understanding of the improved rate capability of Si@G-1 μm anode material compared to graphite (Figure S6). The active surface area was estimated electrochemically using the Randles–Sevcik formula (eq ), which is based on the relationship between the peak current and the scan rate according to the following equation I p = 2.69 × 10 5 × n 3 / 2 A D 1 / 2 C v 1 / 2 where n is the transferred electron number, A [cm 2 ] is the active surface area, D [cm 2 ·s –1 ] is the diffusion coefficient of the lithium ion, C is the Li + ion molar concentration, v [mV·s –1 ] is the scan rate, and I p [mA] is the peak current.…”

Section: Results and Discussionmentioning

confidence: 99%

“…The electrochemical performance of an electrode material is affected not only by its chemical composition but also by its microstructure; for this reason, several methods including chemical vapor deposition (CVD), mechanical milling, thermal decomposition, spray drying, fluidized bed, and spray-drying have been proposed for fabricating Si/Gr anodes. ,, Physical vapor deposition (PVD) techniques are among the deposition processes that have yet to be used in this context, which allows precise control of the coated film’s thickness and uniformity. ,, Other benefits of PVD techniques, including magnetron sputtering processes, include the deposition of films with higher adhesion properties and precise chemical composition. ,, …”

Section: Introductionmentioning

confidence: 99%

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Sputtered Silicon-Coated Graphite Electrodes as High Cycling Stability and Improved Kinetics Anodes for Lithium Ion Batteries

Elomari,

Hdidou,

Larhlimi

et al. 2024

ACS Appl. Mater. Interfaces

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Amorphous Si thin films with different thicknesses were deposited on synthetic graphite electrodes by using a simple and scalable one-step physical vapor deposition (PVD) method. The specific capacities and rate capabilities of the produced electrodes were investigated. X-ray diffraction, scanning electron microscopy, Raman spectroscopy, profilometry, cyclic voltammetry, galvanostatic techniques, and in situ Raman spectroscopy were used to investigate their physicochemical and electrochemical properties. Our results demonstrated that the produced Si films covered the bare graphite electrodes completely and uniformly. Si-coated graphite, Si@G, with an optimal thickness of 1 μm exhibited good stability, with an initial discharge capacity of 628.7 mAhg -1 , a capacity retention of 96.2%, and a columbic efficiency (CE) higher than 99% at C/3. A discharge capacity of 250 mAh g -1 was attained at a high current rate of 3C, which was over 2.5 times that of a bare graphite electrode, thanks to the high activated surface area (1.5 times that of pristine graphite) and reduced resistance during cycling.

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Section: Results and Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Sputtered Silicon-Coated Graphite Electrodes as High Cycling Stability and Improved Kinetics Anodes for Lithium Ion Batteries

Elomari,

Hdidou,

Larhlimi

et al. 2024

ACS Appl. Mater. Interfaces

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“…In today's rapidly evolving technological landscape, lithium-ion batteries (LIBs) stand as the cornerstone of portable power solutions, powering smartphones, laptops, electric vehicles, and various devices [1][2][3]. The essential component at the core of LIBs is the anode material, typically composed of graphite, with a theoretical capacity of 372 mAh/g [4,5]. Nevertheless, the ceaseless pursuit of enhanced battery performance and increased energy storage capacities has driven research.…”

Section: Introductionmentioning

confidence: 99%

Laser-assisted processing of nano-graphite/silicon anode materials for improved performance of Li-ion batteries

Bond,

Andersson,

Engholm

2024

Laser-Based Micro- And Nanoprocessing XVIII

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Lithium-ion batteries are widely used today due to their high energy density, long life cycles, and low self-discharge rates. It commonly uses graphite as an anode material with a high theoretical capacity of 372mAh/g. At the same time, several research groups explore ways to further increase the energy storage capacity of lithium-ion batteries by, for example, adding silicon to the graphite anode material. Silicon is naturally abundant and inexpensive, with low environmental impact and a significantly higher theoretical specific capacity of ~4200mAh/g. A drawback is that graphite-silicon composite anode materials tend to degrade during the charge/discharge cycles, leading to decreased storage capacity over time. This degradation is associated with the size of the silicon particles, where large, micrometer-sized silicon particles are more susceptible to instability than smaller, nanometre-sized particles. To address this issue, we present an investigation using laser-assisted processing of nano-graphite-silicon composites. This process uses low-cost micrometer-sized silicon particles mixed with nano-graphite powder and a 1064 nm continuous wave laser to process the nano-graphite-siliconcoated anode material under various conditions and atmospheres (ambient and nitrogen). The performance of the lithiumion battery is affected by different processing conditions. Specifically, the intensity of the 0.25V and 0.5V anodic peaks, which indicate the delithiation of silicon, is particularly affected, with the inclusion of an additional broader shoulder peak at around 0.3-0.35V. Our investigation suggests that laser-assisted processing of nano-graphite-silicon-composite materials is a scalable concept with the potential to improve the performance of nano-graphite-silicon anodes for lithium-ion batteries.

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“…Various new materials with superior performance have been reported in recent years, concluding Si, Si-C, P, MXenes, Zeolites, MOFs and metal oxides/sulfides. [12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31] For example, Liu et al [21] found rock salt Li 3 V 2 O 5 can achieve over 1000 cycles with negligible capacity decay and exhibits exceptional rate capability. Grey group [23] reported micrometer-scaling niobium tungsten oxides particles, which achieved ultrahigh rate performance by designing appropriate 3D crystal structures and stable host structures.…”

Section: Introductionmentioning

confidence: 99%

Double Perovskite La₂MnNiO₆ as a High‐Performance Anode for Lithium‐Ion Batteries

Zhang

Nie

et al. 2023

Advanced Science

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Traditional lithium‐ion batteries cannot meet the ever‐increasing energy demands due to the unsatisfied graphite anode with sluggish electrochemical kinetics. Recently, the perovskite material family as anode attracts growing attention due to their advantages on specific capacity, rate capability, lifetime, and safety. Herein, a double perovskite La2MnNiO6 synthesized by solid‐state reaction method as a high‐performance anode material for LIBs is reported. La2MnNiO6 with an average operating potential of <0.8 V versus Li+/Li exhibits a good rate capability. Besides, the Li|La2MnNiO6 cells perform long cycle life without decay after 1000 cycles at 1C and a high cycling retention of 93% is observed after 3000 cycles at 6C. It reveals that this material maintains stable perovskite structure with cycling. Theoretical calculations further demonstrate the high electronic conductivity, low diffusion energy barrier, and structural stability of the lithiated La2MnNiO6. This study highlights the double perovskite type material as a promising anode for next‐generation batteries.

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A scalable silicon/graphite anode with high silicon content for high-energy lithium-ion batteries

Cited by 24 publications

References 35 publications

Sputtered Silicon-Coated Graphite Electrodes as High Cycling Stability and Improved Kinetics Anodes for Lithium Ion Batteries

Sputtered Silicon-Coated Graphite Electrodes as High Cycling Stability and Improved Kinetics Anodes for Lithium Ion Batteries

Laser-assisted processing of nano-graphite/silicon anode materials for improved performance of Li-ion batteries

Double Perovskite La₂MnNiO₆ as a High‐Performance Anode for Lithium‐Ion Batteries

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A scalable silicon/graphite anode with high silicon content for high-energy lithium-ion batteries

Cited by 24 publications

References 35 publications

Sputtered Silicon-Coated Graphite Electrodes as High Cycling Stability and Improved Kinetics Anodes for Lithium Ion Batteries

Sputtered Silicon-Coated Graphite Electrodes as High Cycling Stability and Improved Kinetics Anodes for Lithium Ion Batteries

Laser-assisted processing of nano-graphite/silicon anode materials for improved performance of Li-ion batteries

Double Perovskite La2MnNiO6 as a High‐Performance Anode for Lithium‐Ion Batteries

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Double Perovskite La₂MnNiO₆ as a High‐Performance Anode for Lithium‐Ion Batteries