2022
DOI: 10.1039/d2ta06943a
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Revealing the size-dependent electrochemical Li-storage behaviors of SiO-based anodes

Abstract: Silicon monoxide (SiO) is a potential high-capacity anode material for lithium-ion batteries. The complexity of lithiation process of SiO and challenges in characterization of the lithiated products are fundamental aspects...

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Cited by 13 publications
(15 citation statements)
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“…However, the elemental mapping images show regional vacancies in the Si distribution, which become more severe after 30 cycles (Figure S6 of the Supporting Information). It is likely due to the shrinkage and agglomeration of silicon and the blocking of transport access of lithium ions by the products generated from lithium alloying and dealloying reactions . The SEM image (Figure b) also reflects the negative role of the dense microstructure of the electrode material in enhancing the diffusion of lithium ions, leading to the lowest reversible capacity before the half-cell fails.…”
Section: Methodsmentioning
confidence: 99%
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“…However, the elemental mapping images show regional vacancies in the Si distribution, which become more severe after 30 cycles (Figure S6 of the Supporting Information). It is likely due to the shrinkage and agglomeration of silicon and the blocking of transport access of lithium ions by the products generated from lithium alloying and dealloying reactions . The SEM image (Figure b) also reflects the negative role of the dense microstructure of the electrode material in enhancing the diffusion of lithium ions, leading to the lowest reversible capacity before the half-cell fails.…”
Section: Methodsmentioning
confidence: 99%
“…It is likely due to the shrinkage and agglomeration of silicon and the blocking of transport access of lithium ions by the products generated from lithium alloying and dealloying reactions. 4 The SEM image (Figure 6b) also reflects the negative role of the dense microstructure of the electrode material in enhancing the diffusion of lithium ions, leading to the lowest reversible capacity before the half-cell fails. Considering that the intact carbon layer provides sufficient protection for the swelling of silicon, 30 the Si−O skeletons are relatively clean and stretched from 200 to 500 cycles (Figures S7 and S8 of the Supporting Information), contributing to improved cycle performance.…”
Section: Methodsmentioning
confidence: 99%
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“…As an energy storage device, lithium-ion batteries have promising applications in the fields of electronic equipment, power batteries, and large-scale energy storage due to their high capacity, high operating voltage, good cycle performance, and high safety level. , With the continuous improvement of social needs, especially the rapid development of electric vehicles, the energy density limit has become a factor restricting the application of lithium-ion batteries. The Si-based (4200 mA h g –1 ) material as the negative electrode has more than 10 times the theoretical capacity of the current commercial negative electrode material graphite (372 mA h g –1 ), which is a promising candidate for next-generation commercial lithium-ion battery anode materials . However, the Si anode has defects, such as poor electrical conductivity, severe volume expansion effect, and poor electrolyte interface stability, which restrain it from being widely used. , Due to the many advantages such as high electrical conductivity, high mechanical strength, and good electrolyte compatibility, carbon materials can form a composite material with Si to improve the problems of the Si anode. , The currently prepared commercial Si/C anodes are mainly a supported structure in which Si NPs are fixed on the surface of graphite and then covered by amorphous carbon by ball milling, spray drying, and liquid phase coating. Due to the low specific surface area of the carbon support, the Si loading is generally low, and it is not conducive to the requirements of higher specific energy lithium-ion batteries.…”
Section: Introductionmentioning
confidence: 99%
“…3,4 SCs have a long cycle life, can function in a broad range of temperatures, and can quickly store and transfer enormous quantities of energy. 5,6 For usage in a variety of industries, including electric cars, renewable energy systems, consumer electronics, aerospace, and more, SCs are being investigated and developed. [7][8][9] Supercapattery is a new energy storage technology combining the best SCs and LIBs.…”
Section: Introductionmentioning
confidence: 99%