Spherical Silicon/CNT/Carbon Composite Wrapped with Graphene as an Anode Material for Lithium-Ion Batteries

Shin, Min-Seon; Choi, Cheonkyu; Park, Min; Lee, Sung-Man

doi:10.33961/jecst.2021.01004

Cited by 8 publications

(4 citation statements)

References 39 publications

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“…The data are not publicly available due to privacy or ethical restrictions. The comparison of ICE and capacity between our work and previous reports, including porous μ-Si, [19][20][21][22][23][24][25][26][27] μ-Si/C (metal) composites, [28][29][30][31][32][33] μ-Si anodes with novel binders, [34][35][36][37][38][39][40][41][42][43] μ-Si with coating layers [44] and electrolytes modification for μ-Si anodes. [11,[45][46] (c) The rate performance of different electrolytes and (d) corresponding charge-discharge curves in LBH electrolytes at various rates.…”

Section: Conflict Of Interestmentioning

confidence: 70%

Interphasial Pre‐lithiation and Reinforcement of Micro‐Si Anode through Fluorine‐free Electrolytes

Li,

Ruan,

Weng

et al. 2023

Angew Chem Int Ed

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Micro‐sized silicon (mSi) anodes offer advantages in cost and tap density over nanosized counterparts. However, its practical application still suffers from poor cyclability and low initial and later‐cycle coulombic efficiency (CE), caused by the unstable solid electrolyte interphase (SEI) and irreversible lithiation of the surface oxide layer. Herein, a bifunctional fluorine (F)‐free electrolyte was designed for the mSi anode to stabilize the interphase and improve the CE. A combined analysis revealed that this electrolyte can chemically pre‐lithiate the native oxide layer by the reductive LiBH4, and relieve SEI formation and accumulation to preserve the internal conductive network. The significance of this F‐free electrolyte brings unprecedented F‐free interphase that also enables the high‐performance mSi electrode (80 wt % mSi), including high specific capacity of 2900 mAh/g, high initial CE of 94.7 % and excellent cyclability capacity retention of 94.3 % after 100 cycles at 0.2 C. This work confirms the feasibility of F‐free interphase, thus opening up a new avenue toward cost‐advantaged and environmentally friendly electrolytes for more emerging battery systems.

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Section: Conflict Of Interestmentioning

confidence: 70%

Interphasial Pre‐lithiation and Reinforcement of Micro‐Si Anode through Fluorine‐free Electrolytes

Li,

Ruan,

Weng

et al. 2023

Angew Chem Int Ed

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“…The networks fabricated by different types and forms of carbon play a significant role in the electrochemical behavior of Si-based electrodes [53,115]. It has been of great interest to synthesize Si-based composites with CNTs and graphene [116][117][118]. A homogeneous and conductive rigid SiMP based gel was successfully prepared by mixing the phytic acid capped Si with graphene oxide and functionalized CNT.…”

Section: Si/c Compositesmentioning

confidence: 99%

The pursuit of commercial silicon-based microparticle anodes for advanced lithium-ion batteries: A review

Liu

et al. 2022

Nano Research Energy

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Silicon (Si) is one of the most promising anode materials for high-energy lithium-ion batteries. However, the widespread application of Si-based anodes is inhibited by large volume change, unstable solid electrolyte interphase, and poor electrical conductivity. During the past decade, significant efforts have been made to overcome these major challenges toward industrial applications. This review summarizes the recent development of microscale Si-based electrodes fabricated by Si microparticles or other industrial bulk materials from the perspective of industrialization. First, the challenges for microscale Si anodes are clarified. Second, structural design strategies of stable micro-sized Si materials are discussed. Third, other critical practical metrics, such as robust binder construction and electrolyte design, are also highlighted. Finally, future trends and perspectives on the commercialization of Si-based anodes are provided. KEYWORDSsilicon, micro-sized particles, lithium-ion batteries, porous structures, polymer binder, electrolyte design Figure 1 Overview of Si-based anodes for LIBs: (a) merits and (b) fundamental challenges. Reproduced with permission from Ref. [16], © Wiley-VCH GmbH 2021.

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“…The following supporting information can be downloaded at: https: //www.mdpi.com/article/10.3390/batteries8100165/s1, Figure S1 S1: Performance of ball-milled silicon and silicon/CNT anodes in literature; Table S2: Resistance values of the sample based on fitting on the equivalent circuit model. ("References [23][24][25]29,39,[50][51][52][53][54][55] are cited in the Supplementary Materials").…”

Section: Supplementary Materialsmentioning

confidence: 99%

Covalently Bonded Ball-Milled Silicon/CNT Nanocomposite as Lithium-Ion Battery Anode Material

et al. 2022

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The demand for high-capacity lithium-ion batteries (LIBs) is ever-increasing. Thus, research has been focused on developing silicon-based anodes due to their high theoretical capacity and natural abundance. However, silicon-based anodes still suffer from several drawbacks (e.g., a huge volume expansion during lithiation/delithiation and the low conductivity nature of silicon). In this study, we develop a facile and low-cost synthesis route to create a composite of silicon particles and carbon nanotubes (CNTs) via simple two-step mechanical ball milling with a silicon wafer as the silicon precursor. This method produces a strong interaction between silicon particles and the CNTs, forming Si–C bonds with minimum oxidation of silicon and pulverization of the CNTs. The resulting Si/CNT anode exhibits a first cycle Coulombic efficiency of 98.06%. It retains 71.28% of its first cycle capacity of 2470 mAh g−1 after 100 cycles of charge–discharge at a current density of 400 mA g−1. Furthermore, the Si/CNT anode also shows a good rate capability by retaining 80.15%, and 94.56% of its first cycle capacity at a current density of 1000 mA g−1 and when the current density is reduced back to 200 mA g−1, respectively.

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Spherical Silicon/CNT/Carbon Composite Wrapped with Graphene as an Anode Material for Lithium-Ion Batteries

Cited by 8 publications

References 39 publications

Interphasial Pre‐lithiation and Reinforcement of Micro‐Si Anode through Fluorine‐free Electrolytes

Interphasial Pre‐lithiation and Reinforcement of Micro‐Si Anode through Fluorine‐free Electrolytes

The pursuit of commercial silicon-based microparticle anodes for advanced lithium-ion batteries: A review

Covalently Bonded Ball-Milled Silicon/CNT Nanocomposite as Lithium-Ion Battery Anode Material

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