scholarly journals Biomass Porous Carbons Derived from Banana Peel Waste as Sustainable Anodes for Lithium-Ion Batteries

Materials ◽  
2021 ◽  
Vol 14 (20) ◽  
pp. 5995
Author(s):  
Fernando Luna-Lama ◽  
Julián Morales ◽  
Alvaro Caballero
Keyword(s):  
Specific Surface ◽  
Lithium Ion Batteries ◽  
Chemical Activation ◽  
Lithium Ion ◽  
Textural Properties ◽  
Reversible Capacity ◽  
High Energy ◽  
Banana Peel ◽  
Retention Capacity ◽  
X Ray

Disordered carbons derived from banana peel waste (BPW) were successfully obtained by employing a simple one-step activation/carbonization method. Different instrumental techniques were used to characterize the structural, morphological, and textural properties of the materials, including X-ray diffraction, thermogravimetric analysis, porosimetry and scanning electron microscopy with energy-dispersive X-ray spectroscopy. The chemical activation with different porogens (zinc chloride, potassium hydroxide and phosphoric acid) could be used to develop functional carbonaceous structures with high specific surface areas and significant quantities of pores. The BPW@H3PO4 carbon exhibited a high specific surface area (815 m2 g−1), chemical stability and good conductivity for use as an anode in lithium-ion batteries. After 200 cycles, this carbon delivered a reversible capacity of 272 mAh g−1 at 0.2 C, showing a notable retention capacity and good cycling performance even at high current densities, demonstrating its effectiveness and sustainability as an anode material for high-energy applications in Li-ion batteries.

Fabrication of Electrospun Si/Carbon Composite Nanofibers as Anodes Materials for Lithium-Ion Batteries

2012 ◽  
Vol 532-533 ◽  
pp. 92-96 ◽  
Author(s):  
Hui Min Huang ◽  
Zhu Chi Chen ◽  
Jie Yu
Keyword(s):  
Lithium Ion Batteries ◽  
Carbon Nanofibers ◽  
Anode Materials ◽  
Composite Nanofibers ◽  
Lithium Ion ◽  
Reversible Capacity ◽  
Carbon Composite ◽  
X Ray Diffraction ◽  
X Ray ◽  
Surface Oxides

Si/carbon nanofibers (Si/CNFs) composite used as the anode materials of lithium-ion battery have been prepared via electrospinning and calcinations treatment. Hydrofluoric acid is used to remove surface oxides of Si particles. SEM observation indicates that silicon particles are uniformly embedded in the carbon nanofibers. X-ray diffraction (XRD), energy dispersive x-ray spectroscopy (EDX) and Raman scattering have been used to analysis the composition and phase of the composite materials. The first reversible capacity of the Si/CNFs composite is 1004 mAh/g, and 390 mAh/g has been remained after 100 cycles. Such Si/CNFs composite could be a promising anode material in lithium ion batteries.

A one-step synthesis of porous V2O3@C hollow spheres as a high-performance anode for lithium-ion batteries

2018 ◽  
Vol 54 (53) ◽  
pp. 7346-7349 ◽  
Author(s):  
Jianbiao Wang ◽  
Zhenwei Liu ◽  
Wenjuan Yang ◽  
Lijing Han ◽  
Mingdeng Wei
Keyword(s):  
Specific Surface ◽  
Lithium Ion Batteries ◽  
Surface Area ◽  
High Performance ◽  
Hollow Spheres ◽  
Lithium Ion ◽  
Reversible Capacity ◽  
Large Specific Surface Area ◽  
High Reversible Capacity ◽  
One Step

V2O3@C hollow spheres with a large specific surface area exhibited high reversible capacity for LIBs.

scholarly journals Porous Co2VO4 Nanodisk as a High-Energy and Fast-Charging Anode for Lithium-Ion Batteries

2021 ◽  
Vol 14 (1) ◽  
Author(s):  
Jinghui Ren ◽  
Zhenyu Wang ◽  
Peng Xu ◽  
Cong Wang ◽  
Fei Gao ◽  
...  
Keyword(s):  
Energy Density ◽  
Lithium Ion Batteries ◽  
High Capacity ◽  
Lithium Ion ◽  
Reversible Capacity ◽  
High Energy ◽  
High Specific Surface Area ◽  
High Energy Density ◽  
Safety Issues ◽  
Fast Charging

AbstractHigh-energy–density lithium-ion batteries (LIBs) that can be safely fast-charged are desirable for electric vehicles. However, sub-optimal lithiation potential and low capacity of commonly used LIBs anode cause safety issues and low energy density. Here we hypothesize that a cobalt vanadate oxide, Co2VO4, can be attractive anode material for fast-charging LIBs due to its high capacity (~ 1000 mAh g−1) and safe lithiation potential (~ 0.65 V vs. Li+/Li). The Li+ diffusion coefficient of Co2VO4 is evaluated by theoretical calculation to be as high as 3.15 × 10–10 cm2 s−1, proving Co2VO4 a promising anode in fast-charging LIBs. A hexagonal porous Co2VO4 nanodisk (PCVO ND) structure is designed accordingly, featuring a high specific surface area of 74.57 m2 g−1 and numerous pores with a pore size of 14 nm. This unique structure succeeds in enhancing Li+ and electron transfer, leading to superior fast-charging performance than current commercial anodes. As a result, the PCVO ND shows a high initial reversible capacity of 911.0 mAh g−1 at 0.4 C, excellent fast-charging capacity (344.3 mAh g−1 at 10 C for 1000 cycles), outstanding long-term cycling stability (only 0.024% capacity loss per cycle at 10 C for 1000 cycles), confirming the commercial feasibility of PCVO ND in fast-charging LIBs.

Synthesis of Different Molybdenum Disulfide Nanostructures and their Applicability in Lithium Ion Batteries with Ionic Liquid Electrolytes

2013 ◽  
Vol 1496 ◽  
Author(s):  
Daniel Albrecht ◽  
Hendrik Wulfmeier ◽  
Svetlozar Ivanov ◽  
Andreas Bund ◽  
Holger Fritze
Keyword(s):  
Thin Film ◽  
Lithium Ion Batteries ◽  
Molybdenum Disulfide ◽  
Lithium Ion ◽  
Reversible Capacity ◽  
X Ray Diffraction ◽  
Characterization Methods ◽  
Maximum Capacity ◽  
X Ray ◽  
Morphology Characterization

ABSTRACTMolybdenum disulfide (MoS2) nanostructures with three different morphologies are synthesized and tested with respect to their applicability in lithium ion batteries. Thereby, electrolytes based on ionic liquids are used. The electrochemical performance of nanostructures and thin films is compared to evaluate the influence of the morphology. Characterization methods include X-Ray diffraction (XRD), cyclic voltammetry (CV), galvanostatic cycling and thin film calorimetry. The thin film and the nanostructured samples show a reversible capacity of 525 mAh/g and a maximum capacity 225 mAh/g, respectively.

scholarly journals Influence of electrolyte additive of trimethylsilylisocyanate on properties of electrode with nanosilicon for lithium-ion batteries

2021 ◽  
Vol 12 (1) ◽  
pp. 67-78
Author(s):  
S. P. Kuksenko ◽  
◽  
H. O. Kaleniuk ◽  
Yu. O. Tarasenko ◽  
M. T. Kartel ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Elevated Temperatures ◽  
Lithium Ion ◽  
Reversible Capacity ◽  
High Energy ◽  
Organic Electrolyte ◽  
Partial Replacement ◽  
Styrene Butadiene Rubber ◽  
Butadiene Rubber ◽  
Fluoroethylene Carbonate

Even partial replacement of graphite in the anode of lithium-ion batteries with silicon can significantly increase their specific energy. But the issue is the insufficient life cycle of such batteries due to the accelerated degradation of the liquid organic electrolyte with traditional lithium hexafluorophosphate, especially at elevated temperatures. The subject of discussions and further research are the processes involving a natural oxide layer on the surface of silicon in the manufacture and electrochemical litiation–delitiation of Si-containing electrodes. Among the most promising areas for solving the issues of practical application of silicon are new additives to the electrolyte and polymeric binders for electrode masses. This paper demonstrates the capability of trimethylsilylisocyanate (with aminosilane and isocyanate functional groups) as an additive to a liquid organic electrolyte (LiPF6 / fluoroethylene carbonate + ethyl methyl carbonate + vinylene carbonate + ethylene sulfite) to scavenge the reactive HF and PF5 species that alleviates the thermal decomposition of fluoroethylene carbonate at elevated temperatures. This makes it possible to increase the electrochemical parameters of half-cells with a hybrid graphite–nanosilicon working electrode when using water-based binders – carboxymethylcellulose and styrene-butadiene rubber. The addition of trimethylsilylisocyanate in the electrolyte significantly improves the reversible capacity of hybrid electrodes and reduces the accumulated irreversible capacity during prolonged cycling at normal temperature and after exposure at 50 °C, therefore to be effective for use in high-energy lithium-ion batteries.

Enhanced Lithium Ion Storage by Titanium Dioxide Addition to Zinc Telluride-Based Alloy Composites

2020 ◽  
Vol 20 (11) ◽  
pp. 6815-6820
Author(s):  
Quoc Hanh Nguyen ◽  
Seongjoon So ◽  
Jaehyun Hur
Keyword(s):  
Electron Microscopy ◽  
Current Density ◽  
Rate Capability ◽  
Lithium Ion ◽  
Reversible Capacity ◽  
High Energy ◽  
High Rate ◽  
Electrochemical Performances ◽  
Potential Candidate ◽  
X Ray

A nanostructured ZnTe–TiO2–C composite is synthesized, via a two-step high-energy mechanical milling process, for use as a new promising anode material in Li-ion batteries (LIBs). X-ray diffraction and X-ray photoelectron spectroscopy results confirm the successful formation of ZnTe alloy and rutile TiO2 phases in the composites using ZnO, Te, Ti, and C as the starting materials. Scanning electron microscopy, transmission electron microscopy, and energy dispersive X-ray spectroscopy mapping measurements further reveal that ZnTe and TiO2 nanocrystals are uniformly dispersed in an amorphous carbon matrix. The electrochemical performances of ZnTe–TiO2–C and other control samples were investigated. Compared to ZnTe–TiO2 and ZnTe-C composites, the ZnTe– TiO2–C nanocomposite exhibits better performance, thereby delivering a high reversible capacity of 561 mAh g−1 over 100 cycles and high rate capability at a high current density of 5 A g−1 (79% capacity retention of its capacity at 0.1 A g−1). Furthermore, the long-term cyclic performance of ZnTe–TiO2–C at a current density of 0.5 A g−1 shows excellent reversible capacity of 528 mAh g−1 after 600 cycles. This improvement can be attributed to the presence of a TiO2-C hybrid matrix, which acts as a buffering matrix that effectively mitigates the large volume changes of active ZnTe during repeated cycling. Overall, the ZnTe–TiO2–C nanocomposite is a potential candidate for high-performance anode materials in LIBs.

scholarly journals Hydrothermal Synthesis of TiO2 Aggregates and Their Application as Negative Electrodes for Lithium-Ion Batteries: The Conflicting Effects of Specific Surface and Pore Size

Materials ◽  
2021 ◽  
Vol 14 (4) ◽  
pp. 916
Author(s):  
Saida Mehraz ◽  
Wenpo Luo ◽  
Jolanta Swiatowska ◽  
Boudjema Bezzazi ◽  
Abdelhafed Taleb
Keyword(s):  
Hydrothermal Synthesis ◽  
Specific Surface ◽  
Pore Size ◽  
Lithium Ion Batteries ◽  
Photoelectron Spectroscopy ◽  
Electrode Materials ◽  
Lithium Ion ◽  
Synthesis Temperature ◽  
X Ray ◽  
Surface Areas

TiO2 aggregates of controlled size have been successfully prepared by hydrothermal synthesis using TiO2 nanoparticles of different sizes as a building unit. In this work, different techniques were used to characterize the as-prepared TiO2 aggregates, e.g., X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), Brunauer, Emmett and Teller technique (BET), field emission gun scanning electron microscopy (FEGSEM), electrochemical measurements etc. The size of prepared TiO2 aggregates varied from 10–100 nm, and their pore size from around 5–12 nm; this size has been shown to depend on synthesis temperature. The mechanism of the aggregate formations was discussed in terms of efficiency of collision and coalescence processes. These newly synthetized TiO2 aggregates have been investigated as potential negative insertion electrode materials for lithium-ion batteries. The influence of specific surface areas and pore sizes on the improved capacity was discussed—and conflicting effects pointed out.

scholarly journals NiCo2S4 Nanocrystals on Nitrogen-Doped Carbon Nanotubes as High-Performance Anode for Lithium-Ion Batteries

2021 ◽  
Vol 16 (1) ◽  
Author(s):  
Haisheng Han ◽  
Yanli Song ◽  
Yongguang Zhang ◽  
Gulnur Kalimuldina ◽  
Zhumabay Bakenov
Keyword(s):  
Electrochemical Performance ◽  
Lithium Ion Batteries ◽  
High Performance ◽  
High Capacity ◽  
Lithium Ion ◽  
Reversible Capacity ◽  
High Energy ◽  
Cycling Stability ◽  
High Energy Density ◽  
Bimetallic Sulfide

AbstractIn recent years, the development of lithium-ion batteries (LIBs) with high energy density has become one of the important research directions to fulfill the needs of electric vehicles and smart grid technologies. Nowadays, traditional LIBs have reached their limits in terms of capacity, cycle life, and stability, necessitating their further improvement and development of alternative materials with remarkably enhanced properties. A nitrogen-containing carbon nanotube (N-CNT) host for bimetallic sulfide (NiCo2S4) is proposed in this study as an anode with attractive electrochemical performance for LIBs. The prepared NiCo2S4/N-CNT nanocomposite exhibited improved cycling stability, rate performance, and an excellent reversible capacity of 623.0 mAh g–1 after 100 cycles at 0.1 A g–1 and maintained a high capacity and cycling stability at 0.5 A g–1. The excellent electrochemical performance of the composite can be attributed to the unique porous structure, which can effectively enhance the diffusivity of Li ions while mitigating the volume expansion during the charge–discharge processes.

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