Highly mesoporous silicon derived from waste iron slag for high performance lithium ion battery anodes

Chun, Jinyoung; An, Sunhyung; Lee, Jinwoo

doi:10.1039/c5ta04693a

Cited by 31 publications

(7 citation statements)

References 50 publications

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“…Conversely, all the other MR tests without NaCl at low MR temperature (entry 2 and 5) for a longer reduction time (entry 2) or at high MR temperature (entry 3 (resulting XRD in Figure S1b) and 4) resulted in large primary Si particles and a low purity of Si owing to the large reaction heat and the side reaction above, even though the MR conversion and thus yield of mpSi-Y were reasonably high (see Figure S1 and Table S1). After HF treating to remove the Mg 2 SiO 4 , MgF 2 was formed by Mg 2 SiO 4 + 10HF → 2MgF 2 + H 2 SiF 6 + 4H 2 O …”

Section: Results and Discussionmentioning

confidence: 99%

“…After HF treating to remove the Mg 2 SiO 4 , MgF 2 was formed by Mg 2 SiO 4 + 10HF → 2MgF 2 + H 2 SiF 6 + 4H 2 O. 52 Figure 2a compares the XPS spectra of the Si 2p of mpSi-Y and that of zeolite Y in the inset. The single Si 2p peak for zeolite Y at 103.5 eV due to Si 4+ virtually disappeared in the spectrum of mpSi-Y where two deconvoluted peaks at 99.4 and 98.8 eV are ascribed to the metallic Si 2p 3/2 and Si 2p 1/2 , respectively.…”

Section: Resultsmentioning

confidence: 99%

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Zeolite-Templated Mesoporous Silicon Particles for Advanced Lithium-Ion Battery Anodes

et al. 2018

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For the practical use of high-capacity silicon anodes in high-energy lithium-based batteries, key issues arising from the large volume change of silicon during cycling must be addressed by the facile structural design of silicon. Herein, we discuss the zeolite-templated magnesiothermic reduction synthesis of mesoporous silicon (mpSi) (mpSi-Y, -B, and -Z derived from commercial zeolite Y, Beta, and ZSM-5, respectively) microparticles having large pore volume (0.4-0.5 cm/g), wide open pore size (19-31 nm), and small primary silicon particles (20-35 nm). With these appealing mpSi particle structural features, a series of mpSi/C composites exhibit outstanding performance including excellent cycling stabilities for 500 cycles, high specific and volumetric capacities (1100-1700 mAh g and 640-1000 mAh cm at 100 mA g), high Coulombic efficiencies (approximately 100%), and remarkable rate capabilities, whereas conventional silicon nanoparticles (SiNP)/C demonstrate limited cycle life. These enhanced electrochemical responses of mpSi/C composites are further manifested by low impedance build-up, high Li ion diffusion rate, and small electrode thickness changes after cycling compared with those of SiNP/C composite. In addition to the outstanding electrochemical properties, the low-cost materials and high-yield processing make the mpSi/C composites attractive candidates for high-performance and high-energy Li-ion battery anodes.

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Section: Results and Discussionmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Zeolite-Templated Mesoporous Silicon Particles for Advanced Lithium-Ion Battery Anodes

et al. 2018

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“…Recently, Chun et al reported a series of synthetic procedures for preparing the mesoporous Si from the waste iron slag via magnesiothermic reduction aided by NaCl heat scavenger. 34 However, it involves unfavorable 'pre-treatments', such as a ball-mill to grind the unprocessed slag particles and a 'harsh acidic etching process (B5 M HCl)' at high temperature (B80 1C), followed by the calcination for purification and further etching process after the reduction, which is not an efficient extraction of nano-Si from the industrial waste.…”

Section: Synthesis and Characterization Of Si Building Blocksmentioning

confidence: 99%

Salt-mediated extraction of nanoscale Si building blocks: composite anode for Li-ion full battery with high energy density

Ryu

Choi

et al. 2020

Mater. Adv.

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“…[9][10][11][12][13] In common, nano-sized Si has been employed to alleviate the strain in charge/discharge process and prevent particle from cracking. However, the parasitic issues of low tap density and initial Columbic efficiency (ICE) reduce the feasibility of nano-sized Si anodes [14][15][16][17][18][19]. Accordingly, Si particles with larger size were developed as substitution to address these challenges.…”

Section: Introductionmentioning

confidence: 99%

A combination of hierarchical pore and buffering layer construction for ultrastable nanocluster Si/SiOx anode

Zeng

Qin

et al. 2020

Nano Res.

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Porous Si can be synthesized from diverse silica (SiO 2) via magnesiothermic reduction technology and widely employed as potential anode material in lithium ion batteries. However, concerns regarding the influence of residual silicon oxide (SiO x) component on resulted Si anode after reduction are still lacked. In this work, we intentionally fabricate a cauliflower-like silicon/silicon oxide (CF-Si/SiO x) particles from highly porous SiO 2 spheres through insufficient magnesiothermic reduction, where residual SiO x component and internal space play an important role in preventing the structural deformation of secondary bulk and restraining the expansion of Si phase. Moreover, the hierarchically structured CF-Si/SiO x exhibits uniformly-dispersed channels, which can improve ion transport and accommodate large volume expansion, simultaneously. As a result, the CF-Si/SiO x-700 anode shows excellent electrochemical performance with a specific capacity of ~1,400 mA•h•g −1 and a capacity retention of 98% after 100 cycles at the current of 0.2 A•g −1 .

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Highly mesoporous silicon derived from waste iron slag for high performance lithium ion battery anodes

Abstract: We demonstrated the use of iron slag as a raw material to produce highly mesoporous Si for high-performance Li-ion battery anodes.

Cited by 31 publications

References 50 publications

Zeolite-Templated Mesoporous Silicon Particles for Advanced Lithium-Ion Battery Anodes

Zeolite-Templated Mesoporous Silicon Particles for Advanced Lithium-Ion Battery Anodes

Salt-mediated extraction of nanoscale Si building blocks: composite anode for Li-ion full battery with high energy density

A combination of hierarchical pore and buffering layer construction for ultrastable nanocluster Si/SiOx anode

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