Carbon-Coated Si as a Lithium-Ion Battery Anode Material

Yoshio, Masaki; Wang, Hongyu; Fukuda, Kenji; Umeno, Tatsuo; Dimov, Nikolay; Ogumi, Zempachi

doi:10.1149/1.1518988

Cited by 421 publications

(308 citation statements)

References 13 publications

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“…This is probably because the carbon layer is less active for the reductive decomposition of the electrolyte solution than Si surface. 27 Though it was found that Q irr can be effectively reduced by the carboncoating, it should be reduced much more for practical applications. As for the reversible (discharge) capacity, the pristine Si-LP, Si-LP@C(600°C), and Si-LP@C(700°C) had similar initial discharge capacities (25002800 mAh g ¹1 ).…”

Section: ¹1mentioning

confidence: 99%

“…In previous studies, 2226 we have reported that the use of Si thin flakes, Si Leaf Powder μ (Si-LP, Oike & Co., Ltd.), is effective for improving the cycleability by relaxation of the stress due to the volume changes. However, the high Q irr still remained in the first cycle, which is caused by decomposition of the electrolyte solution 27 as well as irreversible reduction of thin oxide layer on the Si-LP surface during the first charging process as:…”

Section: Introductionmentioning

confidence: 99%

“…Yoshio et al reported that a carbon-coated Si powder exhibited not only a good cycleability, but also a low Q irr owing to a considerable suppression of the electrolyte decomposition regardless of a low content of carbon (20 wt%). 27 In this study, we prepared carbon-coated Si-LPs (Si-LP@Cs) to reduce Q irr with a minimum content of carbon, and investigated the effects of the carbon-coating on the negative electrode properties of Si-LPs. Furthermore, addition of vinylene carbonate (VC) in the electrolyte solution was also examined to improve the cycleability of Si-LP@Cs.…”

Section: Introductionmentioning

confidence: 99%

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Carbon Coating of Si Thin Flakes and Negative Electrode Properties in Lithium-Ion Batteries

et al. 2012

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To reduce the high irreversible capacity (Q irr ) of Si thin flake (Si-LP) negative electrode, carbon-coated Si-LPs were prepared using citric acid as a precursor and their charge/discharge properties were investigated as negative electrodes in lithium-ion batteries. The carbon-coated powder was homogeneously coated with a thin carbon layer (8-10 and 6-8 nm in thickness for Si-LPs heat-treated at 600 and 700°C, respectively, 14 wt% for each). The irreversible capacity Q irr was successfully reduced to about a half (ca. 1100 mAh g −1 ) of that of the pristine Si-LP (2336 mAh g −1 ), though the cycleability was slightly deteriorated. The cycleability of Si-LP@Cs was significantly improved by the addition of 10 wt% VC in the electrolyte solution. Si-LP@C(700°C) kept high discharge capacities over 2000 mAh g −1 even after 50 cycles with a reduced Q irr of ca. 1300 mAh g −1 compared with the pristine Si-LP (ca. 2450 mAh g −1 ).

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Section: ¹1mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Carbon Coating of Si Thin Flakes and Negative Electrode Properties in Lithium-Ion Batteries

et al. 2012

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“…However, the practical application of Si to LIBs is quite challenging because Si is associated with significant volume changes which arise during lithium insertion and extraction, which can hasten mechanical fracture of the electrode, cause a loss of electrical conduction paths, and results in continuous electrolyte decomposition at the active surface when exposed by the cracking of Si during cycling, as depicted in Fig. 1 [11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Recent Progress on Polymeric Binders for Silicon Anodes in Lithium-Ion Batteries

Choi

Lee

et al. 2015

Journal of Electrochemical Science and Technology

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Advanced polymeric binders with unique functions such as improvements in the electronic conduction network, mechanical adhesion, and mechanical durability during cycling have recently gained an increasing amount of attention as a promising means of creating high-performance silicon (Si) anodes in lithium-ion batteries with high energy density levels. In this review, we describe the key challenges of Si anodes, particularly highlighting the recent progress in the area of polymeric binders for Si anodes in cells.

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“…43,44 However, this design still possesses three flaws. First, it does not consider the volume changes of silicon during electrochemical reactions.…”

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confidence: 99%

Engineering Empty Space between Si Nanoparticles for Lithium-Ion Battery Anodes

Wu¹,

Zheng²,

Liu³

et al. 2012

Nano Lett.

683

496

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Silicon is a promising high-capacity anode material for lithium-ion batteries yet attaining long cycle life remains a significant challenge due to pulverization of the silicon and unstable solid-electrolyte interphase (SEI) formation during the electrochemical cycles. Despite significant advances in nanostructured Si electrodes, challenges including short cycle life and scalability hinder its widespread implementation. To address these challenges, we engineered an empty space between Si nanoparticles by encapsulating them in hollow carbon tubes. The synthesis process used low-cost Si nanoparticles and electrospinning methods, both of which can be easily scaled. The empty space around the Si nanoparticles allowed the electrode to successfully overcome these problems Our anode demonstrated a high gravimetric capacity (∼1000 mAh/g based on the total mass) and long cycle life (200 cycles with 90% capacity retention).

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Carbon-Coated Si as a Lithium-Ion Battery Anode Material

Cited by 421 publications

References 13 publications

Carbon Coating of Si Thin Flakes and Negative Electrode Properties in Lithium-Ion Batteries

Carbon Coating of Si Thin Flakes and Negative Electrode Properties in Lithium-Ion Batteries

Recent Progress on Polymeric Binders for Silicon Anodes in Lithium-Ion Batteries

Engineering Empty Space between Si Nanoparticles for Lithium-Ion Battery Anodes

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