Single-crystalline Co2Si nanowires directly synthesized on silicon substrate for high-performance micro-supercapacitor

Lee, Ji-Young; Yoo, Chung‐Yul; Lee, Yeong A.; Park, Sang Hyun; Cho, Younghyun; Jun, Jae Hyun; Kim, Woo Youn; Kim, Bongsoo; Yoon, Ho Kyoung

doi:10.1016/j.cej.2019.03.269

Cited by 9 publications

(2 citation statements)

References 76 publications

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“…Transition metal silicide nanowires have been widely studied [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 ]. Fascinating materials from them with diverse features are recognized to be excellent candidates in various applications, including complementary metal-oxide semiconductor devices [ 10 , 11 ], electronics [ 12 , 13 ], photovoltaics [ 14 , 15 ], spintronics [ 16 , 17 ], field emission [ 18 , 19 , 20 ] and thermoelectrics [ 19 , 20 , 21 , 22 , 23 ].…”

Section: Introductionmentioning

confidence: 99%

Single Crystalline Higher Manganese Silicide Nanowire Arrays with Outstanding Physical Properties through Double Tube Chemical Vapor Deposition

Shen

Yang

2020

Nanomaterials

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In this work, we report a novel and efficient silicidation method to synthesize higher manganese silicide (HMS) nanowires with interesting characterization and physical properties. High density silicon nanowire arrays fabricated by chemical etching reacted with MnCl2 precursor through a unique double tube chemical vapor deposition (CVD) system, where we could enhance the vapor pressure of the precursor and provide stable Mn vapor with a sealing effect. It is crucial that the method enables the efficient formation of high quality higher manganese silicide nanowires without a change in morphology and aspect ratio during the process. X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission electron microscopy (TEM) were utilized to characterize the HMS nanowires. High-resolution TEM studies confirm that the HMS nanowires were single crystalline Mn27Si47 nanowires of Nowotny Chimney Ladder crystal structures. Magnetic property measurements show that the Mn27Si47 nanowire arrays were ferromagnetic at room temperature with a Curie temperature of over 300 K, highly depending on the relationship between the direction of the applied electric field and the axial direction of the standing nanowire arrays. Field emission measurements indicate that the 20 μm long nanowires possessed a field enhancement factor of 3307. The excellent physical properties of the HMS nanowires (NWs) make them attractive choices for applications in spintronic devices and field emitters.

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Section: Introductionmentioning

confidence: 99%

Single Crystalline Higher Manganese Silicide Nanowire Arrays with Outstanding Physical Properties through Double Tube Chemical Vapor Deposition

Shen

Yang

2020

Nanomaterials

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“…Si substrates can offer basal for the growth of metal silicide nanowires such as Co 2 Si [49]. The single-crystalline Co 2 Si nanowires/Si materials can be used as freestanding electrodes to construct on-chip microsupercapacitor in ionic liquid electrolytes.…”

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confidence: 99%

A Review on Cutting Edge Technologies of Silicon-Based Supercapacitors

Zhang

Jin

et al. 2021

Journal of Nanomaterials

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Despite Si-based materials and their derivatives have recently emerged as potential electrode materials in advanced energy conversion and storage applications, a review article has not been reported hitherto for Si-based supercapacitors. In this review, the representative progresses of Si-based materials have been illustrated including synthesis, properties, surface modification, and electrochemical properties. A variety of nanomaterials are presented regarding the electrode material design and booming device constructions. Effective strategies for the preparation of Si-based materials and their derivatives are summarized especially including silicon/silicon carbide nanowires, silicon substrates, silicon particles, three-dimensional silicon structures, and silicon-based doping materials. Meanwhile, the overall behaviors in supercapacitor application have been illustrated in terms of specific capacitance, rate capability, cycling life, and energy density. Furthermore, large-voltage microsupercapacitors are outlined for next-generation integration devices.

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Advances in Si and SiC Materials for High‐Performance Supercapacitors toward Integrated Energy Storage Systems

Nguyen

Aberoumand

Dao

2021

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recently attracted considerable research attention thanks to its low mass density (2.33 g cm −3 ), nontoxicity, and biocompatibility. [6,7] Besides, the intrinsic semiconductor and tunable on-chip characteristics enable Si to be a central platform of several applications, including optoelectronics, [8,9] microelectronics, [10] smart sensors, [11,12] solar cells, [13][14][15] and drug-delivery systems. [16] From an energy perspective, seamless integration of energy storage systems onto these Si-based functional devices is highly desirable toward portable and wearable applications, or when the power supply is intermittent. Therefore, significant research has focused on Sibased energy storage, including Si-based batteries (mainly Li-ion batteries) and Sibased supercapacitors.In Li-ion batteries, Si has been intensively studied as a promising anode candidate due to the low working potential of 0.4 V (vs Li + /Li) and high theoretical capacity (3579 mAh g −1 ), compared to the conventional graphite anode. [17] However, as an alloy-type material, Si anode notoriously suffers from huge volume expansion/shrinkage during lithiation/delithiation (over 300%), leading to severe delamination and pulverization of electrodes, together with unstable and nonuniform solid electrolyte interphase layers. [18] These characteristics considerably affect the cyclic stability of Si-anode Li-ion batteries. Several strategies have been implemented to address the aforementioned challenges, including composite and coating materials design, [19][20][21][22][23][24] binder design, [25][26][27][28] and electrolyte modification. [29][30][31][32] These approaches nevertheless are mainly based on wet-chemistry methods with complicated synthesis techniques, which are not suitable for an integrated system. A very thin layer of Si has been proven to accommodate the mechanical stress during alloying/ dealloying. [33][34][35] Inspired by this concept, several studies have focused on thin film Si-anode batteries based on integrated circuit (IC)-compatible routes, and their potentials to be integrated with other functional Si-based devices. [36][37][38][39] However, the intricate charge storage mechanism of Si-based batteries inevitably limits their applications. In particular, batteries suffer from low power performance. Although parallel and/or series connections of batteries can guarantee high power, the device volume will be increased, which is not desirable for an integrated system. Furthermore, owing to their inferior stability and lifetime, batteries unavoidably require frequent replacements, meaning that they cannot be applied in devices such as bioimplant chips, biosensors, and harsh-environment sensors. [40,41] Silicon (Si), as the second most abundant element on Earth, has been a central platform of modern electronics owing to its low mass density and unique semiconductor properties. From an energy perspective, all-in-one integration of power supply systems onto Si-based functional devices is highly desirable, which inspires significant study ...

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Single-crystalline Co2Si nanowires directly synthesized on silicon substrate for high-performance micro-supercapacitor

Cited by 9 publications

References 76 publications

Single Crystalline Higher Manganese Silicide Nanowire Arrays with Outstanding Physical Properties through Double Tube Chemical Vapor Deposition

Single Crystalline Higher Manganese Silicide Nanowire Arrays with Outstanding Physical Properties through Double Tube Chemical Vapor Deposition

A Review on Cutting Edge Technologies of Silicon-Based Supercapacitors

Advances in Si and SiC Materials for High‐Performance Supercapacitors toward Integrated Energy Storage Systems

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