Enhanced electrochemical performance promoted by monolayer graphene and void space in silicon composite anode materials

Ding, Xuli; Liu, Xiaoxiao; Huang, Yangyang; Zhang, Xuefu; Zhao, Qianjin; Xiang, Xinghua; Li, Guolong; He, Pan; Zhang, Wen; Li, Ju; Huang, Yunhui

doi:10.1016/j.nanoen.2016.07.031

Cited by 69 publications

(61 citation statements)

References 57 publications

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“…For the planer electrode design, the delithiation capacity drops to 60% of its original capacity at 1.8 mAh/cm 2 loading after 28 cycles; whereas for electrodes using secondary particles, the capacity decay is minimum. The high current density delithiation (2500 mAh/g) is also improved as lithium‐ion transport improves within the composite secondary particle based electrode …”

Section: Efforts To Enhance the Si Electrode Stabilitymentioning

confidence: 99%

“…Silicon nanoparticles embedded in polymer matrices as anode materials are a promising material combination for high capacity and flexible components of Li batteries . Also, the high theoretical capacity (3579 mAh/g) given in Figure , low voltage plateau (0.1 V vs Li/Li + ), nontoxicity, low cost, and high abundance of silicon have made it as the focus of the recent researches.…”

Section: Introductionmentioning

confidence: 99%

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An overview on efforts to enhance the Si electrode stability for lithium ion batteries

2019

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This report summarizes the challenges and developments related to the cycle stability of Si anodes. It describes the two-component material concepts using polymer blends and the approaches to material optimization for more stable Si anodes. Since the anode behavior also depends strongly on the Si particle size (and in polymer mixtures no uniform Si particle size is given), the properties of the Si anodes depending on the Si particle size and the underlying fundamental processes at the solid-electrolyte interface were described shortly. Bicomponent silicon-based composites (carbon additives, inorganic nanoparticles and polymers) on the anode behavior were compared by two properties: specific capacity and cycle number of the anodes. This article focuses on Si-polymer blends where the polymer can act as a binder or/and as a solid-state electrolyte. To help further the understanding the role of polymer we have gathered together useful data from the literature on solubilities, flexibility and hardness for the polymers generally used. We offer a perspective for polymer hydrogels that will enable a promising material composition for stable Si anodes. K E Y W O R D Sconductive polymers, hydrogels, lithium ion battery, silicon anode, solid-electrolyte interphase 2 | CHALLENGES FOR SI ELECTRODES Si based anodes are quite instable, capacity decay, cracks on anode, failure of electrical conductivity and inhibition are problems to be solved.

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Section: Efforts To Enhance the Si Electrode Stabilitymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

An overview on efforts to enhance the Si electrode stability for lithium ion batteries

2019

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“…Presently, in order to achieve the above energy density goals, many efforts have been focused on developing high-capacity cathode and anode materials of LIBs [5][6][7]. For cathode materials, Ni-rich ternary materials Li [8,9], while on the anode side, major efforts have been devoted to constructing siliconbased [10] or tin-based carbon composites with high capacity and good cycling stability [11]. However, higher-capacity materials tend to show lower thermal stability.…”

Section: Introductionmentioning

confidence: 99%

Building Safe Lithium-Ion Batteries for Electric Vehicles: A Review

Duan

Tang

Dai

et al. 2019

Electrochem. Energ. Rev.

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556

260

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Lithium-ion batteries (LIBs), with relatively high energy density and power density, have been considered as a vital energy source in our daily life, especially in electric vehicles. However, energy density and safety related to thermal runaways are the main concerns for their further applications. In order to deeply understand the development of high energy density and safe LIBs, we comprehensively review the safety features of LIBs and the failure mechanisms of cathodes, anodes, separators and electrolyte. The corresponding solutions for designing safer components are systematically proposed. Additionally, the in situ or operando techniques, such as microscopy and spectrum analysis, the fiber Bragg grating sensor and the gas sensor, are summarized to monitor the internal conditions of LIBs in real time. The main purpose of this review is to provide some general guidelines for the design of safe and high energy density batteries from the views of both material and cell levels.

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“…Various Si nanostructures including nanotubes [12] , nanoparticles [13] , nanowires [14] , and porous nanofilms [15] , have been developed to promote the stability of materials. The surface coating, such as Si/C [16][17][18][19] , Si/CNT [12,20] , Si/graphene [16,21,22] , Si/TiO 2 [4,5,23,24] and Si/SnO 2 [25] , is considered to be another effective method to improve the electrochemical performance of Si. The composite materials prepared by these approaches protect the Si from directly contacting with the electrolyte and then reduce the uncontrollable growth of SEI layer.…”

Section: Introductionmentioning

confidence: 99%

Facile preparation of core-shell Si@Li4Ti5O12 nanocomposite as large-capacity lithium-ion battery anode

Liu

Gao

et al. 2020

Journal of Energy Chemistry

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Enhanced electrochemical performance promoted by monolayer graphene and void space in silicon composite anode materials

Cited by 69 publications

References 57 publications

An overview on efforts to enhance the Si electrode stability for lithium ion batteries

An overview on efforts to enhance the Si electrode stability for lithium ion batteries

Building Safe Lithium-Ion Batteries for Electric Vehicles: A Review

Facile preparation of core-shell Si@Li4Ti5O12 nanocomposite as large-capacity lithium-ion battery anode

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