Electrochemical study of Si/C composites with particulate and fibrous morphology as negative electrodes for lithium-ion batteries

Gómez-Cámer, Juan Luis; Thuv, Heidi; Novák, Petr

doi:10.1016/j.jpowsour.2015.06.067

Cited by 17 publications

(10 citation statements)

References 26 publications

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“…17 Therefore, further strategies involving binders and electrolyte additives are being pursued. 23 Si takes a special position among the Li-alloying materials, because it combines a relatively low average de-lithiation potential (∼0.4 V vs. Li + /Li) with extremely high specific charge and volumetric charge density (3579 mAh/g, 2190 mAh/cm 3 per Si). 17 On the cell level, addition of Si can increase the gravimetric and especially the volumetric energy densities of many composite electrodes, which is of particular interest for the combination with positive electrodes of high specific charge (Figures 1b, 1c), as discussed below.…”

Section: Lithium Based Systemsmentioning

confidence: 99%

Rechargeable Batteries: Grasping for the Limits of Chemistry

Berg¹,

Villevieille²,

Streich³

et al. 2015

J. Electrochem. Soc.

Self Cite

225

263

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The demand for rechargeable batteries with high gravimetric and volumetric energy density will continue to grow due to the rapidly increasing integration of renewable energy into the global energy scheme. In terms of energy density, modern high-end rechargeablebattery technology is reaching its fundamental limits and no big advancement leaps in this field are expected. The energy-cost model, developed for comparative evaluation of battery cell chemistries in a commercial type pouch cell configuration, helps us to find the relationship between cost and energy density, enabling the prediction of the most promising material combinations for near-future non-aqueous rechargeable batteries for portable electronics and automotive applications. Among the wide variety of positive electrode materials only few show enough potential for commercialization, and, clearly, the immediate future will still be dominated by Li-ion technology, with Li-rich and Ni-rich materials as definite winners, and with Li-S and Na-ion emerging as contestants due to low cost and abundance of their key components. As further significant improvements in gravimetric/volumetric energy density and cost cannot be achieved through new battery chemistries, then the engineering, targeting cost reduction and safety assurance, will most likely be the main driving force behind future rechargeable battery development.One of the most important roles of research and development today is to steer technology toward long-term sustainability for generation, storage, and consumption of energy. Handling global warming, pollution, and energy shortage is a serious challenge, and failure to address it timely will have severe environmental and political consequences. Only a widespread integration of renewable energy generation, supported by efficient energy storage, can provide a long-term solution. Fortunately, renewables have already begun to affect several major societal energy sectors, such as transportation and electrical grids, albeit so far to a very moderate extent due to inefficient and costly energy storage. 1,2 Electrochemical energy storage provides the most efficient, clean, and feasible solution for high-end applications, as illustrated by the successful battery integration into long drive-range electric vehicles (EV). Because of the immense interest in electrochemical energy storage from both government funding agencies and industry in recent years, activities in this field have surged. This makes the continuous critical reassessment of new battery chemistries and concepts based on the latest state of research valuable.Here we assess active materials designated for high-performance non-aqueous rechargeable batteries for portable electronics and automotive applications according to their commercialization potential within the coming decade. Non-aqueous electrolytes generally offer higher energy densities due to their wider electrochemical stability window, enabling a higher cell voltage (>2 V). In this respect, Liion is the superior battery technology, outp...

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Section: Lithium Based Systemsmentioning

confidence: 99%

Rechargeable Batteries: Grasping for the Limits of Chemistry

Berg¹,

Villevieille²,

Streich³

et al. 2015

J. Electrochem. Soc.

Self Cite

225

263

View full text Add to dashboard Cite

show abstract

“…However, the many associated problems of the LiSi-based cells such as; large irreversible capacity at room temperature [2,6,7,[152][153][154] and poor cyclability [3,155] that is often attributed to low electronic conductivity and the large volume change (>300%) during lithium insertion/de-insertion process. This volume change impacts negatively on the Si crystal structure, inducing stresses in Si lattice and thus leading to cracks formation and pulverization of the Si particles.…”

Section: Si/carbon Composite Nanofibersmentioning

confidence: 99%

“…Ge, SnO2, MnOx, iron oxides, and TiO2 [22,164,165] have been developed to improve the electrochemical performances of LiSi electrode. In the Si/metal binary alloys composites [26,27,[165][166][167][168][169][170], the metal/metal oxides act as the unlithiated part of the composite alloy thereby forming a framework that prevents the pulverization of the Si particles [6], improve stability and [3,167,[171][172][173][174][175][176][177][178][179][180][181] (Fig.4). The carbon nanofiber in the matrix acts as a buffer for the volume change and improves the electronic conductivity of the electrode.…”

Section: Si/c Composite Nanofiber Anodementioning

confidence: 99%

“…[6,7,[182][183][184][185][186]. The Si/CNFs nanostructures can suppress volume changes since the pores act as the structure buffer for the large volume changes during cycling, and hence help maintain the high specific capacity and cycle performance of the electrode above 1500mAhg -1 over several cycles [3,7,22,163,167].…”

Section: Si/c Composite Nanofiber Anodementioning

confidence: 99%

“…Nanostructured fibers made from metals, metal oxides, polymers, ceramics, and composites have been developed for use in various energy storage devices such as high-performance rechargeable lithium (Li) batteries (e.g. Li-ion, Li-sulfur, and Li-air batteries), sodium (Na) , magnesium (Mg), aluminum (Al) and zinc (Zn) batteries and supercapacitors [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18]. The popularity of these nanofibers stem from the many attributes such as; controllable fiber diameter, high surface areato-volume ratio, low density, and high pore volume [6,[19][20][21].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Composite Nanofibers as Advanced Materials for Li-ion, Li-O2 and Li-S Batteries

Agubra

Zúñiga

Flores

et al. 2016

Electrochimica Acta

113

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The quest to increase the energy density and improve the cycle life performance of lithium ion batteries (LIBs) and beyond has led to the development of various suitable and alternative materials for energy storage and conversion. The morphology and electrode architecture in advanced battery materials have been re-designed into nanofibers and composite nanofibers. Nanofiber-based separators and electrodes have been demonstrated to improve the energy density and cycling performance of LIBs. The improvement in the structure and morphology of nanofibers in Lithium ion batteries such as LiSi and LiSn, have once again ignited the interest in these Li:M alloys anode as an alternative anode and cathode materials. The major challenges that confront this new frontier has been the seemingly lack of scalable method among the various techniques and design nanofibers with good structure and morphology that could prevent dendrite penetrations. However, there seem to be a solution in sight with the advent of mass production techniques of nanofibers by electrospinning and centrifugal spinning (i.e. Forcespinning®) that have recently been developed. In this paper, the use of nanofibers and composite nanofibers as electrode and separator materials for lithium ion, Li-O2 and Li sulfur batteries is reviewed. The discussion focuses on the performance characteristics of these nanostructured electrode and separator materials and methods used to improve their performances.

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