A Scalable Silicon Nanowires-Grown-On-Graphite Composite for High-Energy Lithium Batteries

Saravanan, K.; Keller, Caroline; Kumar, Praveen; Jouneau, Pierre‐Henri; Aldakov, Dmitry; Ducros, Jean-Baptiste; Lapertot, G.; Chenevier, Pascale; Haon, Cédric

doi:10.1021/acsnano.0c05198

Cited by 81 publications

(85 citation statements)

References 39 publications

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“…Even after grinding and calendaring, SiNWs in the anode remain stiff. Agglomerates of SiNWs contain a nanoscale porosity that was clearly imaged in our recent FIB-SEM study [3]. Such porosity allows swelling during lithiation with a low risk of sintering with neighboring SiNWs.…”

Section: Electrochemical Performance In Li-ion Batteriesmentioning

confidence: 57%

“…Si is an earth-abundant, low-cost, and non-toxic element, with a mature industrial knowledge base from its application in electronics, optics, and photovoltaics. Furthermore, its low potential, close to Li/Li + , makes it suitable for composites with graphite, the current commercial anode material [2][3][4]. Finally, Si shows a high Li-alloying capacity but, consequently, an undesired high volume change in cycling [5].…”

Section: Introductionmentioning

confidence: 99%

“…This deleterious volume change stimulated the development of Si nanomaterials, because Si at the nano scale can withstand swelling without fracture during LiB cycling. This has been demonstrated for a variety of morphologies including Si nanoparticles (SiNP) [6][7][8][9][10][11], Si nanowires (SiNW) [3,[12][13][14], Si nanotubes [15,16], and Si porous nanomaterials [17][18][19]. However, nanostructuration can be a costly process that needs to be carefully optimized for a dedicated application.…”

Section: Introductionmentioning

confidence: 99%

“…Additional electrode engineering is, thus, required to take full advantage of the promising performances of SiNWs. An alternative strategy consists of growing SiNWs at the surface of graphite flakes to produce directly a composite anode material [3]. This way, we could reduce micronsized aggregation and attain full Si capacity cycling.…”

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confidence: 99%

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Effect of Size and Shape on Electrochemical Performance of Nano-Silicon-Based Lithium Battery

et al. 2021

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Silicon is a promising material for high-energy anode materials for the next generation of lithium-ion batteries. The gain in specific capacity depends highly on the quality of the Si dispersion and on the size and shape of the nano-silicon. The aim of this study is to investigate the impact of the size/shape of Si on the electrochemical performance of conventional Li-ion batteries. The scalable synthesis processes of both nanoparticles and nanowires in the 10–100 nm size range are discussed. In cycling lithium batteries, the initial specific capacity is significantly higher for nanoparticles than for nanowires. We demonstrate a linear correlation of the first Coulombic efficiency with the specific area of the Si materials. In long-term cycling tests, the electrochemical performance of the nanoparticles fades faster due to an increased internal resistance, whereas the smallest nanowires show an impressive cycling stability. Finally, the reversibility of the electrochemical processes is found to be highly dependent on the size/shape of the Si particles and its impact on lithiation depth, formation of crystalline Li15Si4 in cycling, and Li transport pathways.

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Section: Electrochemical Performance In Li-ion Batteriesmentioning

confidence: 57%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

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Effect of Size and Shape on Electrochemical Performance of Nano-Silicon-Based Lithium Battery

et al. 2021

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“…[ 9–12 ] To address these problems, nano‐sized Si has been widely investigated because it can effectively prevent the pulverization and minimize the mechanical stress induced by the volume change. Longer cycle performance has been reported for Si nanoparticles, [ 13–16 ] nanowires, [ 17–21 ] and nanotubes. [ 22,23 ] However, the low coulombic efficiency and tapping density caused by the high specific surface area limit the commercialization of nano‐sized Si.…”

Section: Introductionmentioning

confidence: 99%

Porous silicon derived from 130 nm Stöber silica as lithium‐ion battery anode

et al. 2021

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Micro‐sized porous silicon‐based anode materials gain much interest due to good cycling stability, high rate performance, reasonable tap density and low processing cost. Self‐templating process is developed to construct micro‐sized macro‐/mesoporous silicon through magnesiothermic reduction of Stöber silica. The size of the silica particles plays a vital role in the structure control of the porous silicon. In this work, silica particles with a diameter of 130 nm are used as templates to guide the synthesis of micro‐sized macro‐/mesoporous silicon. The magnesiothermic reduction temperature is varied in a systematic way to reveal the self‐templating mechanism comprehensively. It is found that the silica particles with small diameter of 130 nm still exercise the self‐templating effect during the magnesiothermic reduction process in the temperature range of 700 to 900°C. Based on the experimental results, the structure‐property correlation of the porous silicon anode is unveiled. Improved electrochemical performance is demonstrated by the porous silicon compared to the commercial nano‐sized silicon.

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Silicon in Hollow Carbon Nanospheres Assembled Microspheres Cross‐linked with N‐doped Carbon Fibers toward a Binder Free, High Performance, and Flexible Anode for Lithium‐Ion Batteries

Zhu

Wang

et al. 2021

Adv Funct Materials

132

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Silicon (Si), as the most promising anode material, has drawn tremendous attention to substitute commercially used graphite for lithium‐ion batteries (LIBs). However, recently, the insufficiently high structural stabilities and electron/ion conductivities of silicon‐based composites have become the main concerns, hindering the further progress of silicon as the anode material for LIBs. Herein, to cope with these concerns, a binder‐free and free‐standing type anode electrode paper is fabricated from self‐assembled microspheres and intertwined fabrics, in which a 3D interconnected nitrogen/carbon network connects hollow carbon nanospheres with uniformly distributed silicon nanodots (SHCM/NCF). The as‐prepared SHCM/NCF paper maintains a reversible capacity of 1442 mAh g−1 at 1 A g−1 for 800 cycles in lithium half‐cell, and 450 mAh g−1 at 0.5 A g−1 for 200 cycles in lithium full‐cell, respectively. The excellent battery performances are mainly attributed to the free‐standing paper electrode suppressing side reactions, nitrogen/carbon networks maintaining electrical contact, and silicon nanodots alleviating the harm caused by volume expansion. Furthermore, this excellent performance combined with the simplicity of the synthesis method and the saving of excess polymer binder, current collector and conducting additives, make the designed paper exhibit great potential in practical applications.

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A Scalable Silicon Nanowires-Grown-On-Graphite Composite for High-Energy Lithium Batteries

Cited by 81 publications

References 39 publications

Effect of Size and Shape on Electrochemical Performance of Nano-Silicon-Based Lithium Battery

Effect of Size and Shape on Electrochemical Performance of Nano-Silicon-Based Lithium Battery

Porous silicon derived from 130 nm Stöber silica as lithium‐ion battery anode

Silicon in Hollow Carbon Nanospheres Assembled Microspheres Cross‐linked with N‐doped Carbon Fibers toward a Binder Free, High Performance, and Flexible Anode for Lithium‐Ion Batteries

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