scholarly journals Machine Learning as a Tool for Specific Capacity Prediction of Prospective Potassium Battery Electrodes

2022 ◽  
Author(s):  
Souvik Manna ◽  
Diptendu Roy ◽  
Sandeep Das ◽  
Biswarup Pathak
Keyword(s):  
Machine Learning ◽  
Energy Storage ◽  
Metal Ion ◽  
Data Science ◽  
Electrode Materials ◽  
Performance Metrics ◽  
Materials Science ◽  
Specific Capacity ◽  
High Energy ◽  
Percentage Error

Application of data science and machine learning (ML) techniques in the domain of materials science has been increasing by leaps and bounds recently. With the help of ML, through input features derived from available databases we can rapidly screen materials based on our desired output. Capacity is one of the important parameters for choosing suitable electrode materials for high energy storage metal ion battery. Exploration of suitable electrode materials for metal ion batteries other than Li ion batteries (LIBs) has been deficient, though there is a need to develop alternative battery technologies with higher energy storage characteristics and environmental safety. In this work, we have considered Li, Na and K-ion electrode materials and their available battery data from Materials Project database to predict specific capacity of prospective K-ion battery electrode materials. Suitable features have been considered and developed to train the various ML algorithms. Mean Absolute Percentage Error has been considered as the performance metrics for assessment of different ML algorithms and among them, kernel ridge regression has been adopted as the most useful to predict the capacity of unknown electrode materials for K-ion battery. Using the value of specific capacity, the number of intercalated K ions in the formula unit of the non-intercalated electrode material compounds have also been calculated. DFT calculations have also been performed to verify the results obtained through ML. Our result shows ML is an encouraging alternative to computationally demanding DFT process as it can screen electrode materials rapidly for battery.

Nanostructured Niobium Oxides as Negative Electrodes for Lithium and Sodium Ion Batteries

2021 ◽  
Author(s):  
Pete Levi Barnes
Keyword(s):  
Energy Storage ◽  
Electrode Materials ◽  
Specific Capacity ◽  
High Energy ◽  
Sodium Ion ◽  
Self Organization ◽  
Solvent Mixtures ◽  
Wide Range ◽  
Negative Electrodes ◽  
Electrochemical Cycling

Over 30 years have passed since the commercialization of the lithium ion battery (LIB), which to date continues to present key challenges in energy/power, stability, and safety. Intense research efforts have made large strides in developing durable LIBs with high energy and power densities toward a wide range of applications from electric vehicles to large scale energy storage systems for renewable energy. Nevertheless, limited work has been done in the applications of amorphous oxide electrode materials due to the perception that amorphous materials are less electrically conductive than crystalline ones. Recent studies suggest that inducing crystallization of amorphous nanostructured oxides through electrochemical cycling can lead to materials with enhanced electrochemical charge storage performance. However, fundamental knowledge regarding the driving forces, thermodynamics, and nucleation and growth kinetics of the electrochemically-induced amorphous-to-crystalline (a-to-c) transformation remains limited. In this work we report a new nanostructured rock salt (RS) Nb2O5 electrode formed through operando electrochemical cycling of amorphous Nb2O5 with Li+. This new polymorph of Nb2O5 exhibits high capacity, superb rate capability, and great cycle life in LIBs, owing to the open framework of the cubic structure. We show, for the first time, that the insertion of three lithium ions into Nb2O5 (~ 1.5 electron transfers per Nb) is possible in the new RS-Nb2O5 (LixNb2O5, 0 ≤ x ≤ 3) for Li-ion storage. Utilizing the a-to-c approach in Nb2O5 electrodes permitted a much higher specific capacity because the system was naturally allowed to choose and optimize its crystalline structure through a process of self-organization. This work also presents a unique opportunity to utilize nanostructured Nb2O5 materials for the sodium ion battery (SIB) system, which is an attractive alternative to LIB due to a more sustainable outlook. The origin of this endeavor began by studying the degradation of sodium hexafluorophosphate (NaPF6)-based non-aqueous electrolytes containing different solvent mixtures (e.g., cyclic and acyclic carbonates) in the presence of water, highlighting two electrolyte additives, 2,2,2-trifluoroethoxy-2,2,2-ethoxy phosphazene (FM2) and fluoroethylene carbonate (FEC). We found that FEC is not efficient to protect the electrodes from being exposed to HF, while FM2 mitigated HF formation. Initial insight into nanochanneled Nb2O5 negative electrodes for SIB have indicated material with larger pore size, smaller wall thickness, and more amorphous character perform at the highest capacity and at larger rates. Our efforts focus on developing a fundamental understanding of the self-organization of nanoscale amorphous transition metal oxides during cycling, and examining the physiochemical phenomena of this phase transformations for creating a powerful modular approach to designing improved battery materials with programmable physical and chemical properties. In addition, this work expands into exploring the effects of crystallinity on the performance of Nb2O5 electrodes used in SIBs. Our broader impact was aimed at profoundly transforming electrical energy storage research, fabrication, and applications to enable new design strategies for nanoscale oxide materials that go beyond current energy materials performance limits.

scholarly journals Controlled Nanostructuration of Cobalt Oxyhydroxide Electrode Material for Hybrid Supercapacitors

Materials ◽  
2021 ◽  
Vol 14 (9) ◽  
pp. 2325
Author(s):  
Ronan Invernizzi ◽  
Liliane Guerlou-Demourgues ◽  
François Weill ◽  
Alexia Lemoine ◽  
Marie-Anne Dourges ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Energy Storage ◽  
Specific Surface ◽  
Electrode Materials ◽  
Specific Capacity ◽  
Hybrid Supercapacitors ◽  
Cobalt Oxyhydroxide ◽  
Precipitation Medium ◽  
The Impact

Nanostructuration is one of the most promising strategies to develop performant electrode materials for energy storage devices, such as hybrid supercapacitors. In this work, we studied the influence of precipitation medium and the use of a series of 1-alkyl-3-methylimidazolium bromide ionic liquids for the nanostructuration of β(III) cobalt oxyhydroxides. Then, the effect of the nanostructuration and the impact of the different ionic liquids used during synthesis were investigated in terms of energy storage performances. First, we demonstrated that forward precipitation, in a cobalt-rich medium, leads to smaller particles with higher specific surface areas (SSA) and an enhanced mesoporosity. Introduction of ionic liquids (ILs) in the precipitation medium further strongly increased the specific surface area and the mesoporosity to achieve well-nanostructured materials with a very high SSA of 265 m2/g and porosity of 0.43 cm3/g. Additionally, we showed that ILs used as surfactant and template also functionalize the nanomaterial surface, leading to a beneficial synergy between the highly ionic conductive IL and the cobalt oxyhydroxide, which lowers the resistance charge transfer and improves the specific capacity. The nature of the ionic liquid had an important influence on the final electrochemical properties and the best performances were reached with the ionic liquid containing the longest alkyl chain.

Mn-based oxides for aqueous rechargeable metal ion batteries

2021 ◽  
Author(s):  
Yaning Gao ◽  
Haoyi Yang ◽  
Ying Bai ◽  
Chuan Wu
Keyword(s):  
Energy Storage ◽  
Metal Ion ◽  
Electrode Materials ◽  
Storage Systems ◽  
Energy Storage Systems

Aqueous rechargeable metal ion batteries (ARMBs), featuring safety, facile manufacturing and environmental benignity, have recently attracted extensive attention as promising energy storage systems. Particularly, pursuit of electrode materials with abundance,...

scholarly journals Novel Lithium-Ion Capacitor Based on a NiO-rGO Composite

Materials ◽  
2021 ◽  
Vol 14 (13) ◽  
pp. 3586
Author(s):  
Qi An ◽  
Xingru Zhao ◽  
Shuangfu Suo ◽  
Yuzhu Bai
Keyword(s):  
Energy Storage ◽  
Energy Density ◽  
Power Density ◽  
High Power ◽  
Specific Capacity ◽  
Lithium Ion ◽  
High Energy ◽  
Cycle Life ◽  
High Energy Density ◽  
Lithium Ion Capacitor

Lithium-ion capacitors (LICs) have been widely explored for energy storage. Nevertheless, achieving good energy density, satisfactory power density, and stable cycle life is still challenging. For this study, we fabricated a novel LIC with a NiO-rGO composite as a negative material and commercial activated carbon (AC) as a positive material for energy storage. The NiO-rGO//AC system utilizes NiO nanoparticles uniformly distributed in rGO to achieve a high specific capacity (with a current density of 0.5 A g−1 and a charge capacity of 945.8 mA h g−1) and uses AC to provide a large specific surface area and adjustable pore structure, thereby achieving excellent electrochemical performance. In detail, the NiO-rGO//AC system (with a mass ratio of 1:3) can achieve a high energy density (98.15 W h kg−1), a high power density (10.94 kW kg−1), and a long cycle life (with 72.1% capacity retention after 10,000 cycles). This study outlines a new option for the manufacture of LIC devices that feature both high energy and high power densities.

High-Capacity Derivatives Produced from Hydrolytic Lignin as Electrode Materials for Energy Storage and Conversion

2018 ◽  
Vol 386 ◽  
pp. 359-364
Author(s):  
Yury M. Nikolenko ◽  
Denis P. Opra ◽  
Alexander K. Tsvetnikov ◽  
Alexander Yu. Ustinov ◽  
Valery G. Kuryavyi ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Energy Storage ◽  
Electrode Materials ◽  
Electronic Conductivity ◽  
Specific Capacity ◽  
Energy Storage And Conversion ◽  
Operating Voltage ◽  
X Ray ◽  
Thermally Activated ◽  
Hydrolytic Lignin

The hydrolytic lignin derivatives have been prepared via its physical activation (high-temperature heating in vacuum) followed by chemical modification (fluorination). The obtained products were characterized using scanning electron microscopy, X-ray diffraction, transmission electron microscopy, Raman spectroscopy, and X-ray photoelectron spectroscopy. It was found that the graphitized product of thermal activation up to 1000 °C at a low rate of < 2 °C/min under high vacuum shows an enhanced specific surface area (215 m2/g), that makes its potentially useful as sorbent, catalytic substrate or electrode material. To clarify the potentialities of hydrolytic lignin derivatives for energy storage and conversion, the electrochemical system with metallic lithium anode was applied. The galvanostatic discharge of battery at a current density of 100 μA/cm2between 3.0 and 0.5 V shows that the specific capacity of thermally activated derivative is equal to 845 mA·h/g, while the untreated lignin yields only 190 mA·h/g. The improve of the electrochemical performance of product originates from its graphitization, increasing electronic conductivity, and, possibly, enhanced ability to adsorb of oxygen. The fluorination of both the lignin and its thermally activated form results in higher operating voltage of battery, as seems, due to the involvement of fluorine bound to carbon in electrochemical process.

Nano-dendrite structured cobalt phosphide based hybrid supercapacitor with high energy storage and cycling stability

2021 ◽  
Author(s):  
Xiaoyu Chen ◽  
Pu Chang ◽  
Shuo Zhang ◽  
Lixiu Guan ◽  
Guohe Ren ◽  
...  
Keyword(s):  
Energy Storage ◽  
Specific Capacity ◽  
High Energy ◽  
Cycling Stability ◽  
Activation Process ◽  
Carbon Cloth ◽  
Cobalt Phosphide ◽  
Improved Performance ◽  
Transition Metal Phosphides ◽  
High Energy Storage

Abstract The supercapacitors possessing high energy storage and long serving period have strategic significance to solve the energy crisis issues. Herein, fluffy nano-dendrite structured cobalt phosphide (CoP) is grown on carbon cloth through simple hydrothermal and electrodeposition treatments (CoP/C-HE). Benefit from its excellent electrical conductivity and special structure, CoP/C-HE manifests a high specific capacity of 461.4 C g-1 at 1 A g-1. Meanwhile, the capacity retention remains 92.8% over 10000 cycles at 5 A g-1, proving the superior cycling stability. The phase conversion of Co2P during the activation process also contributes to the improved performance. The assembled two-electrode asymmetric supercapacitor demonstrates excellent performance in terms of energy density (42.4 W h kg-1 at a power density of 800.0 W kg-1) and cycling stability (86.3% retention over 5000 cycles at 5 A g-1), which is superior to many reported cobalt-based supercapacitors. Our work promotes the potential of transition metal phosphides for the applications in supercapacitors.

Recent Advances on the Application of Graphene Quantum Dots in Energy Storage

2021 ◽  
Vol 15 ◽  
Author(s):  
Feng Shi ◽  
Quanrun Liu
Keyword(s):  
Quantum Dots ◽  
Energy Storage ◽  
Potential Application ◽  
Active Sites ◽  
Electrode Materials ◽  
Specific Capacity ◽  
Graphene Quantum Dots ◽  
Energy Storage Devices ◽  
Storage Devices ◽  
New Energy

Background: As an emerging carbon nanomaterial, graphene quantum dots (GQDs) have shown great potential application in new energy storage devices due to their unique small size effect and abundant edge active sites. This work introduces the main synthesis strategies of GQDs, which includes top-down and bottom-up methods; the application examples of GQDs and GQDs-based composites in energy storage are reviewed, and more, the unique advantages of GQDs are used in supercapacitors, Lithium-ion batteries (LIBs) and Lithium-sulfur batteries (Li–S batteries) are highlighted. The problems and development prospects in this growing area are also discussed. Method: We conducted a detailed search of “the application of GQDs in energy storage devices” in the published papers and the public patents based on Web of Science database in the period from 2014 to 2020. The corresponding literature was carefully evaluated and analyzed. Results: Sixty papers and twenty-eight recent patents were included in this mini-review. The significant advances in the recent years are summarized with comparative and balanced discussion. Thanks to the unique properties of large specific surface area, high conductivity and abundant active sites, GQDs have unparalleled potential application for new energy storage, especially improving the specific capacity and cycle stability of supercapacitors, LIBs and Li-S batteries. Conclusion: The findings of this mini-review confirm the importance of GQDs, show the enhanced electrochemical performance in supercapacitors, LIBs and Li-S batteries, and also provide a helpful guide to design and fabricate highefficiency electrode materials.

Porous Activity of Biomass-Activated Carbon Enhanced by Nitrogen-Dopant Towards High-Performance Lithium Ion Hybrid Battery-Supercapacitor

2021 ◽  
Author(s):  
Juan Yu ◽  
Xuyang Wang ◽  
Jiaxin Peng ◽  
Xuefeng Jia ◽  
Linbo Li ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Energy Storage ◽  
Pore Structure ◽  
High Performance ◽  
Electrode Materials ◽  
Specific Capacity ◽  
Lithium Ion ◽  
Utilization Efficiency ◽  
Energy Storage Devices ◽  
Storage Devices

Abstract Biomass-activated carbon materials are promising electrode materials for lithium-ion hybrid capacitors (LiCs) because of their natural hierarchical pore structure. The efficient utilization of structural pores in activated carbon is very important for their electrochemical performance. Herein, porous biomass-activated carbon (PAC) with large specific surface area was prepared using a one-step activation method with biomass waste as the carbon source and ZnCl2 as the activator. To further improve its pore structure utilization efficiency, the PAC was doped with nitrogen using urea as the nitrogen source. The experimental results confirmed that PAC-1 with a high nitrogen doping level of 4.66% exhibited the most efficient pore utilization among all the samples investigated in this study. PAC-1 exhibited 92% capacity retention after 8000 cycles, showing good cycling stability. Then, to maximize the utilization of high-efficiency energy storage devices, LiNi0.8Co0.15Al0.05O2 (NCA), a promising cathode material for lithium-ion batteries with high specific capacity, was compounded with PAC-1 in different ratios to obtain NCA@PC composites. The NCA@PC-9 composite exhibited excellent capacitance in LiCs and an energy density of 210.9 Wh kg-1 at a high power density of 13.3 kW kg-1. These results provide guidelines for the design of high-performance and low-cost energy storage devices.

Investigations and improvement of Nickel Sulfide modified electrode material from single source precursor for energy storage application

2021 ◽  
Author(s):  
C. Sambathkumar ◽  
R. Ranjithkumar ◽  
S. Ezhil Arasi ◽  
A. Manikandan ◽  
N. Nallamuthu ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Energy Storage ◽  
Nickel Sulfide ◽  
Electrode Materials ◽  
High Energy ◽  
Attractive Potential ◽  
Single Source ◽  
Thermo Gravimetric ◽  
Single Source Precursor ◽  
Charge Discharge

Abstract High-performance energy storage electrode materials are emerging demand in near future for the construction of supercapacitor with high energy and power densities. Herein, Nickel (II) Diethyldithiocarbamate was used as single source precursor for Nickel Sulfide (Ni9S8) two dimensional (2D) nanosheets preparation and hexadecylamine as shape directing agent via simple solvothermal method. The orthorhombic structure of Ni9S8 nanosheets was confirmed by X-ray diffraction (XRD) pattern. Scanning electron microscopy (SEM) and high resolution transmission electron microscopy (HRTEM) images revealed that as-prepared Ni9S8 nanoparticles possess sheet-like morphology. Besides, the thermal stability of Ni(DTC)2 complex was studied by Thermo-gravimetric/Derivative thermo gravimetric(TG/DTG) with Differential scanning calorimetric (DSC) analysis. The electrochemical properties of Ni9S8 nanosheets was studied using galvanostatic charge-discharge (GCD) and cyclic voltammetry (CV) techniques. From the charge-discharge study of Ni9S8 nanosheets, a high specific capacitance of 281 Fg− 1 was obtained at a current density of 1 Ag− 1, and up to 82 % retentivity was achieved after 5000 cycles. Thus, the prepared Ni9S8 nanosheets could be one of the attractive potential active electrode materials for the application of supercapacitor.

A highly-effective nitrogen-doped porous carbon sponge electrode for advanced K–Se batteries

2020 ◽  
Vol 7 (5) ◽  
pp. 1182-1189 ◽  
Author(s):  
Xianglong Huang ◽  
Jianhua Deng ◽  
Yuruo Qi ◽  
Dingyu Liu ◽  
Yuanke Wu ◽  
...  
Keyword(s):  
Energy Storage ◽  
Alkali Metal ◽  
Porous Carbon ◽  
Metal Ion ◽  
Storage System ◽  
Specific Capacity ◽  
Energy Storage System ◽  
Alkali Metal Ion ◽  
Nitrogen Doped ◽  
Critical Issues

A rechargeable K–Se battery is emerging as an energy storage system because of its much higher specific capacity than that of the traditional alkali metal-ion batteries, but is facing some critical issues and challenges.

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