Journal ArticleDOI
Co9S8 nanoflakes on graphene (Co9S8/G) nanocomposites for high performance supercapacitors
Rajendran Ramachandran,M. Saranya,Chella Santhosh,V. Velmurugan,Bala P.C. Raghupathy,Soon Kwan Jeong,Andrews Nirmala Grace +6 more
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TLDR
In this article, the structural, morphological and physical properties of Co9S8/graphene nanocomposites were analyzed by X-ray diffraction (XRD), Field Emission Scanning Electron Microscopy (FE-SEM), XPS, and thermogravimetric analysis (TGA).Abstract:
Co9S8/graphene nanocomposites (Co9S8/G) at various concentrations of graphene and Co9S8 were prepared by a simple chemical route from cobalt nitrate and graphene as precursors in the presence of PVP as surfactant and thioacetamide (TAA) as sulfur source. To gain knowledge about the structural, morphological and physical properties, the composite material was analyzed by X-ray diffraction (XRD), Field Emission Scanning Electron Microscopy (FE-SEM), X-ray photoelectron spectroscopy (XPS) and thermogravimetric Analysis (TGA). SEM measurements showed the presence of well dispersed, ∼300 nm sized Co9S8 nanoflakes. To assess the properties of the nanocomposites for their applicability in supercapacitors, electrochemical analysis was carried out in 6 M KOH electrolyte. A maximum specific capacitance of 808 F g−1 was observed for Co9S8/G-d at 5 mV s−1 scan rate. Galvanostatic charge–discharge curves showed the excellent cyclic stability of Co9S8/G-d composite with higher charge–discharge duration than pure Co9S8. The excellent electrochemical performance of the composite could be due to the better electrical conductivity behavior of graphene on Co9S8 nanoflakes.read more
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First principles study on electrochemical and chemical stability of solid electrolyte–electrode interfaces in all-solid-state Li-ion batteries
Yizhou Zhu,Xingfeng He,Yifei Mo +2 more
TL;DR: In this paper, the authors performed first principles calculations to evaluate the thermodynamics of the interfaces between solid electrolyte and electrode materials and to identify the chemical and electrochemical stabilities of these interfaces.
Journal ArticleDOI
In Situ Transformation of MOFs into Layered Double Hydroxide Embedded Metal Sulfides for Improved Electrocatalytic and Supercapacitive Performance
TL;DR: This study demonstrates self-templated pseudomorphic transformation of MOF into surface chemistry rich hollow framework that delivers highly reactive, durable, and universal electrochemically active energy conversion and storage functionalities.
Journal ArticleDOI
Carbon-armored Co9S8 nanoparticles as all-pH efficient and durable H2-evolving electrocatalysts.
Feng Liangliang,Guo-Dong Li,Yipu Liu,Yuanyuan Wu,Hui Chen,Yun Wang,Yong-Cun Zou,Dejun Wang,Dejun Wang,Xiaoxin Zou +9 more
TL;DR: It is shown that cobalt pentlandite (Co9S8) nanoparticles can serve as an electrochemically active, noble-metal-free material toward hydrogen evolution reaction, and they work stably in neutral solution but not in acidic (pH 0) and basic ( pH 14) media.
Journal ArticleDOI
Solid-State Li–Metal Batteries: Challenges and Horizons of Oxide and Sulfide Solid Electrolytes and Their Interfaces
TL;DR: In this article, the authors present a roadmap for the development of a successful oxide and sulfide-based ASSLB focusing on interfacial challenges, while accounting for five parameters: energy density, power density, longterm stability, processing, and safety.
Journal ArticleDOI
Hollow mesoporous hetero-NiCo2S4/Co9S8 submicro-spindles: unusual formation and excellent pseudocapacitance towards hybrid supercapacitors
Linrui Hou,Yaoyao Shi,Siqi Zhu,Muhammad Rehan,Gang Pang,Gang Pang,Xiaogang Zhang,Changzhou Yuan +7 more
TL;DR: In this paper, a template-free methodology was proposed to fabricate high-quality uniform hollow hetero-NiCo2S4/Co9S8 (NCCS) submicro-spindles with well-dispersed heter-nanodomains at the nanoscale.
References
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Effect of morphology on supercapacitive properties of chemically grown β-Ni(OH)2 thin films
TL;DR: In this article, the effect of different nickel precursors on structural, morphological and supercapacitive properties of β-Ni(OH) 2 thin films have been investigated by X-ray diffraction and FTIR studies.
Journal ArticleDOI
Supercapacitors incorporating hollow cobalt sulfide hexagonal nanosheets
TL;DR: In this paper, a hollow cobalt sulfide (CoS) hexagonal nanosheets (HNSs) were prepared from Co(NO 3 ) 2 and thioacetamide in the presence of poly(vinylpyrrolidone) (PVP) at 100°C under alkaline condition.
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Vanadium oxide nanowire – Graphene binder free nanocomposite paper electrodes for supercapacitors: A facile green approach
Sanjaya D. Perera,Anjalee D. Liyanage,Nour Nijem,John P. Ferraris,Yves J. Chabal,Kenneth J. Balkus +5 more
TL;DR: In this article, V2O5 nanowire (VNWs) and graphene composite flexible paper electrodes were prepared without using binders, which is a green alternative to traditional hydrazine reduction.
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Hydrothermal synthesis and structure evolution of hierarchical cobalt sulfide nanostructures
Wenjun Dong,Xuebin Wang,Bingjie Li,Lina Wang,Benyong Chen,Chaorong Li,Xiao Li,Tierui Zhang,Zhan Shi +8 more
TL;DR: The flower-like CoS nanostructures show the best charge-discharge performance among all CoS products with the highest specific capacitance values of 389 F g(-1) at current density of 5 mA cm(-2), and 277 F g −1 at higher current density.
Journal ArticleDOI
β-Cobalt sulfide nanoparticles decorated graphene composite electrodes for high capacity and power supercapacitors
Baihua Qu,Yuejiao Chen,Ming Zhang,Lingling Hu,Danni Lei,Bingan Lu,Qiuhong Li,Yanguo Wang,Yanguo Wang,Libao Chen,Taihong Wang +10 more
TL;DR: In this paper, β-cobalt sulfide nanoparticles were homogeneously distributed on a highly conductive graphene (CS-G) nanocomposite, which was confirmed by transmission electron microscopy analysis.