Insight into the decay mechanism of non-ultra-thin silicon film anode for lithium-ion batteries

Chai, Linjiang; Wang, Xingyu; Su, Ben; Li, Xiaogan; Xue, Wendong

doi:10.1016/j.electacta.2023.142112

Cited by 3 publications

(2 citation statements)

References 29 publications

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“…However, the capacity retention rate increases, reaching a maximum of 87.17% at 0.08 V, and then tends to decrease again. The cycling data reveal that the capacity starts to drop continuously after a certain number of cycles (19,34,53, and 53 turns at 0.02−0.1 V). Figure 3c shows the change in the capacity of the silicon films after each cycle.…”

Section: Electrochemical Performance Of Silicon Thin-film Electrodes ...mentioning

confidence: 98%

“…For example, the cycle life of silicon anodes is greatly influenced by their size, with smaller silicon materials in the nanometer range exhibiting better cycle performance . Previous research demonstrated that applying pressure to a silicon material effectively limits its constant expansion during cycling . This stress can be achieved by constructing silicon-X composites, where X represents a stable inactive material , or an active material with minimal expansion during cycling, such as a carbon-based material. − These composites not only provide a stress support but also address the conductivity issue of silicon.…”

Section: Introductionmentioning

confidence: 99%

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Lifetime Optimization of Amorphous Silicon Thin-Film Anodes for Lithium-Ion Batteries

Chai,

Wang,

et al. 2023

ACS Appl. Energy Mater.

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Silicon has emerged as a highly promising anode material for lithium-ion batteries (LIBs) owing to its high specific capacity and low voltage. However, previous research on silicon-based anodes has not adequately addressed inherent issues, leading to limited commercial applications on a large scale. Therefore, further scientific investigation is necessary to uncover the lithiation/delithiation process in silicon materials and understand the influence of electrode potential and charge state on the kinetic process during charge and discharge. This understanding will be instrumental in gradually enhancing the performance of silicon materials. Herein, amorphous silicon films were prepared for LIB anodes using the magnetron sputtering method. Molecular dynamics simulations were conducted to investigate the microstructure and volumetric changes of the sputtered amorphous silicon anode during the lithiation and delithiation processes. Additionally, electrochemical characterization techniques such as a galvanostatic intermittent titration technique, electrochemical impedance spectroscopy, and galvanostatic charge–discharge test were employed to explore the electrochemical properties of silicon electrodes. Electrochemical analysis techniques, such as the differential capacity method and distribution of relaxation times, were also used to investigate the deterioration mechanisms of the electrochemical and conversion properties of amorphous silicon anodes. Results revealed that the lithium-ion content in Li x Si, determined through the set cutoff voltage during charge/discharge cycling, considerably affected the volume change of the silicon anode and the composition and integrity of the solid electrolyte interface after cycling. The optimum discharge cutoff voltage was found to be 0.08 V for the amorphous silicon electrode, leading to an optimum cycle life with a capacity retention of 87.17% after 100 cycles.

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Section: Electrochemical Performance Of Silicon Thin-film Electrodes ...mentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Lifetime Optimization of Amorphous Silicon Thin-Film Anodes for Lithium-Ion Batteries

Chai,

Wang,

et al. 2023

ACS Appl. Energy Mater.

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Controllable Interface Engineering for the Preparation of High Rate Silicon Anode

Wang,

Lu,

et al. 2024

Adv Funct Materials

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Silicon (Si) is considered to be the promising candidate anode for the next generation of high‐energy‐density batteries. However, the poor initial coulombic efficiency (ICE) and rate performance severely hinder its commercial development. Here, fully exploits the 2D structure of photovoltaic silicon waste (PV‐WSi), combining with the advantage of controllable depositing layers offered by fluidized bed atomic layer deposition (FBALD), to simultaneously achieve high ICE and highrate performance of Si‐based anodes. The characteristic of Li+ embedding vertically into the plane direction of the 2D sheet‐like structure of PV‐WSi helps shorten the diffusion distance, alleviating the pulverization problem caused by volume expansion. FBALD is utilized to controllably deposit Li2O (≈1 nm) and TiO2 (≈4 nm) layers to compensate for the loss of Li sources, further suppressing the volume expansion of Si and isolating the side reactions between Si and electrolyte. The prepared Si@Li2O@TiO2 demonstrates ultrahigh ICE (90.9%) and outstanding rate performance (>900 mAh g−1 at a rate of 20 A g−1). Full cells with the Si@Li2O@TiO2 anode and LiFePO4 cathode deliver a stable capacity of 100 mAh g−1 after 300 cycles at 0.5 C. This work provides new ideas for the development of high ICE, high‐rate Si‐based anodes based on low‐cost photovoltaic waste.

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3D Printing Manufacturing of Lithium Batteries: Prospects and Challenges toward Practical Applications

Huo,

Sheng,

et al. 2023

Advanced Materials

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The manufacturing and assembly of components within cells have a direct impact on the sample performance. Conventional processes restrict the shapes, dimensions, and structures of the commercially available batteries. 3D printing, a novel manufacturing process for precision and practicality, is expected to revolutionize the lithium battery industry owing to its advantages of customization, mechanization, and intelligence. This technique can be used to effectively construct intricate 3D structures that enhance the designability, integrity, and electrochemical performance of both liquid‐ and solid‐state lithium batteries. In this study, an overview of the development of 3D printing technologies is provided and their suitability for comparison with conventional printing processes is assessed. Various 3D printing technologies applicable to lithium‐ion batteries have been systematically introduced, especially more practical composite printing technologies. The practicality, limitations, and optimization of 3D printing are discussed dialectically for various battery modules, including electrodes, electrolytes, and functional architectures. In addition, all‐printed batteries are emphatically introduced. Finally, the prospects and challenges of 3D printing in the battery industry are evaluated.

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Insight into the decay mechanism of non-ultra-thin silicon film anode for lithium-ion batteries

Cited by 3 publications

References 29 publications

Lifetime Optimization of Amorphous Silicon Thin-Film Anodes for Lithium-Ion Batteries

Lifetime Optimization of Amorphous Silicon Thin-Film Anodes for Lithium-Ion Batteries

Controllable Interface Engineering for the Preparation of High Rate Silicon Anode

3D Printing Manufacturing of Lithium Batteries: Prospects and Challenges toward Practical Applications

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