Amorphous-silicon@silicon oxide/chromium/carbon as an anode for lithium-ion batteries with excellent cyclic stability

Li, Mingqi; Gu, Jingwei; Feng, Xiaobing; He, Hongyan; Zeng, Chong

doi:10.1016/j.electacta.2015.02.224

Cited by 62 publications

(28 citation statements)

References 37 publications

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“…Firstly,a -Si has high resistance to structure fracture. [8][9][10][11] To our knowledge,n op orous a-Si has been explored as the anode before,a lthough porous structures have been demonstrated to be very helpful in crystalline Si (c-Si). 0.22 V) than c-Si (0.12 V).…”

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confidence: 96%

“…Thus,fabricating a-Si by asimple method without the above drawbacks,isagreat challenge.O nt he other hand, most of the as-obtained a-Si anodes are either thin films or solid particles. [8][9][10][11] To our knowledge,n op orous a-Si has been explored as the anode before,a lthough porous structures have been demonstrated to be very helpful in crystalline Si (c-Si). [4a] Herein, porous a-Si powders,a re synthesized by as olvothermal reaction followed by ah igh-temperature annealing, (Scheme 1).…”

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confidence: 96%

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Mesoporous Amorphous Silicon: A Simple Synthesis of a High‐Rate and Long‐Life Anode Material for Lithium‐Ion Batteries

Lin

Chu

et al. 2016

Angewandte Chemie

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Amorphous Si (a-Si)s hows potential advantages over crystalline Si (c-Si)i nl ithium-ion batteries,o wingt oi ts high lithiation potential and good tolerance to intrinsic strain/ stress.H erein, porous a-Si has been synthesized by as imple process,w ithout the uses of dangerous or expensive reagents, sophisticated equipment, and strong acids that potential cause environment risks.These porous a-Si particles exhibit excellent electrochemical performances,owing to their porous structure, amorphous nature,a nd surface modification. They deliver ac apacity of 1025 mAh g À1 at 3Ag À1 after 700 cycles.M oreover,the reversible capacity after electrochemical activation, is quite stable throughout the cycling, resulting in ac apacity retention about around 88 %. The direct comparison between a-Si and c-Si anodes clearly supports the advantages of a-Si in lithium-ion batteries.Scheme 1. Synthesis process of porous a-Si anode.

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confidence: 96%

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confidence: 96%

Mesoporous Amorphous Silicon: A Simple Synthesis of a High‐Rate and Long‐Life Anode Material for Lithium‐Ion Batteries

Lin

Chu

et al. 2016

Angewandte Chemie

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“…As shown in Figure 6e, the semicircles presenting at the high Figure 6. [37][38][39] All interface resistances from the first to 1000 th cycle tend to decrease and then stabilize, which coincides with the activation and stabilization of the electrode. c) Specific charge/discharge capacities of the Si@void@C composite spheres with various silicon loadings of 50-72 %wt.…”

Section: Electrochemical Performancementioning

confidence: 76%

Synthesis of Robust Silicon Nanoparticles@Void@Graphitic Carbon Spheres for High‐Performance Lithium‐Ion‐Battery Anodes

Gao

Chen

et al. 2017

ChemElectroChem

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Silicon is known to be a promising candidate anode material for lithium-ion batteries because of its ultrahigh capacity; however, its volume expansion/shrinkage during lithiation/delithiation reactions represent the biggest challenge in practical applications. In this paper, we successfully design and synthesize a new type of robust silicon nanoparticles@void@graphitic carbon spheres (Si@void@C) material to buffer the silicon volume changes in the cyclic lithiation/delithiation process. The asobtained Si@void@C nanocomposite spheres with well-dispersed silicon nanoparticles, efficient void spaces, and graphitic carbon shells can endow this nanocomposite anode with the robustness to solve the volume expansion/shrinkage issue. As demonstrated by coin battery performances, the Si@void@C nanocomposite sphere-based anode exhibits a specific capacity retention of 1565 and 1260 mAhg À1 at C/5 and C/2 (1C = 4200 mAg À1 ), respectively, after 1000 cycles of deep charge/ discharge processes (voltage between 0.01 and 2.7 V versus Li/ Li + ). It provides a promising anode for a safe and highperformance Si-based materials in high-performance lithium-ion batteries.[a] X.

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“…Li/Li + . The peak around 1.3 V is attributed to the reduction or decomposition of FEC [26,27], and the broad one around 0.7 V represents the further formation of SEI film by decomposition of solvent [28,29]. When the potential goes lower to ~0.1 V, a sharp reduction peak can be observed.…”

Section: Electrochemical Propertiesmentioning

confidence: 99%

Facile synthesis of Si-C nanocomposites with yolk-shell structure as an anode for lithium-ion batteries

Tang

Zhang

et al. 2017

Journal of Alloys and Compounds

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A yolk-shell structured Si-based anode is synthesized by depositing MgO, instead of SiO 2 , as sacrifice layer and CVD process. Thus the HF etching can be substituted by using diluted HCl, which is less toxic and corrosive. The results show the yolk-shell structure is successfully synthesized and has an improved electrochemistry performance. The amount of MgO coating also has been investigated. The proper mass ratio of MgO and Si can be approx. 2 and a reversible charge capacity of 901 mAh g-1 and 88.3% retention was achieved after 100 cycles at 1.0 A g-1. The significant improvements for cycle performance demonstrate the yolk-shell structured Si-C nanocomposite in this work is a promising anode material for lithium-ion batteries.

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Amorphous-silicon@silicon oxide/chromium/carbon as an anode for lithium-ion batteries with excellent cyclic stability

Cited by 62 publications

References 37 publications

Mesoporous Amorphous Silicon: A Simple Synthesis of a High‐Rate and Long‐Life Anode Material for Lithium‐Ion Batteries

Mesoporous Amorphous Silicon: A Simple Synthesis of a High‐Rate and Long‐Life Anode Material for Lithium‐Ion Batteries

Synthesis of Robust Silicon Nanoparticles@Void@Graphitic Carbon Spheres for High‐Performance Lithium‐Ion‐Battery Anodes

Facile synthesis of Si-C nanocomposites with yolk-shell structure as an anode for lithium-ion batteries

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