scholarly journals Rendering Wood Veneers Flexible and Electrically Conductive through Delignification and Electroless Ni Plating

Materials ◽  
2019 ◽  
Vol 12 (19) ◽  
pp. 3198 ◽  
Author(s):  
Minfeng Chen ◽  
Weijun Zhou ◽  
Jizhang Chen ◽  
Junling Xu
Keyword(s):  
Value Added ◽  
Current Collector ◽  
Carbon Cloth ◽  
Energy Storage Devices ◽  
Electrically Conductive ◽  
Graphene Foam ◽  
Storage Devices ◽  
Li Ion ◽  
Electroless Ni ◽  
A Current

Wood has unique advantages. However, the rigid structure and intrinsic insulating nature of wood limit its applications. Herein, a two-step process is developed to render wood veneers conductive and flexible. In the first step, most of the lignin and hemicellulose in the wood veneer are removed by hydrothermal treatment. In the second step, electroless Ni plating and subsequent pressing are carried out. The obtained Ni-plated veneer is flexible and bendable, and has a high tensile strength of 21.9 and 4.4 MPa along and across the channel direction, respectively, the former of which is considerably higher than that of carbon cloth and graphene foam. Moreover, this product exhibits high electrical conductivity around 1.1 × 103 S m−1, which is comparable to that of carbon cloth and graphene foam, and significantly outperforms previously reported wood-based conductors. This work reveals an effective strategy to transform cheap and renewable wood into a high value-added product that rivals expensive carbon cloth and graphene foam. The obtained product is particularly promising as a current collector for flexible and wearable electrochemical energy storage devices such as supercapacitors and Li-ion batteries.

scholarly journals Novel Practical Life Cycle Prediction Method by Entropy Estimation of Li-Ion Battery

Electronics ◽  
2021 ◽  
Vol 10 (4) ◽  
pp. 487
Author(s):  
Tae-Kue Kim ◽  
Sung-Chun Moon
Keyword(s):  
Lithium Ion Batteries ◽  
Prediction Method ◽  
Lithium Ion ◽  
Estimation Accuracy ◽  
Battery Life ◽  
Energy Storage Devices ◽  
Storage Devices ◽  
Basic Law ◽  
Life Problems ◽  
Li Ion

The growth of the lithium-ion battery market is accelerating. Although they are widely used in various fields, ranging from mobile devices to large-capacity energy storage devices, stability has always been a problem, which is a critical disadvantage of lithium-ion batteries. If the battery is unstable, which usually occurs at the end of its life, problems such as overheating and overcurrent during charge-discharge increase. In this paper, we propose a method to accurately predict battery life in order to secure battery stability. Unlike the existing methods, we propose a method of assessing the life of a battery by estimating the irreversible energy from the basic law of entropy using voltage, current, and time in a realistic dimension. The life estimation accuracy using the proposed method was at least 91.6%, and the accuracy was higher than 94% when considering the actual used range. The experimental results proved that the proposed method is a practical and effective method for estimating the life of lithium-ion batteries.

High-Performance Supercapacitors Based on ɛ-MnO2/RGO Fiber Electrodes for Wearable Energy Storage

2018 ◽  
Vol 18 (12) ◽  
pp. 8352-8359 ◽  
Author(s):  
Xibin Liu ◽  
Gaohua liao ◽  
Xiang Qi ◽  
Xiaoan Mei ◽  
Jifei Wang ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Energy Storage ◽  
High Performance ◽  
Fiber Surface ◽  
Current Collector ◽  
Cost Effective ◽  
Surface Acting ◽  
Energy Storage Devices ◽  
Hybrid Fibers ◽  
Storage Devices

Hybrid fibers based on MnO2/reduced graphene oxide have been fabricated for flexible energy storage devices. Graphene oxide nanoflakes were reduced in a polytetrafluoroethylene (PTFE) pipeline under the appropriate condition to develop a fiber current collector, which also provides the possibility of weaving. The RGO fiber with the radius of about 35 μm has a resistance of 150 Ω · cm. MnO2 nanoflakes directly grow on the RGO fiber surface acting as the electrode material of the device. The MnO2/RGO hybrid fibers provide excellent energy storage performances. The as-fabricated SC exhibits a high areal capacitance of 1.37 F·cm−2 at the scan rate of 1 mV·s−1, and outstanding long-term cycling stability of 93.75% retention after 5000 cycles. This work demonstrates a cost-effective and versatile strategy for wearable energy storage devices.

Rational design of Li3VO4@carbon core–shell nanoparticles as Li-ion hybrid supercapacitor anode materials

2017 ◽  
Vol 5 (39) ◽  
pp. 20969-20977 ◽  
Author(s):  
Eunho Lim ◽  
Won-Gwang Lim ◽  
Changshin Jo ◽  
Jinyoung Chun ◽  
Mok-Hwa Kim ◽  
...  
Keyword(s):  
Anode Materials ◽  
Rational Design ◽  
High Energy ◽  
Rate Performance ◽  
Hybrid Supercapacitor ◽  
Energy Storage Devices ◽  
Shell Nanoparticles ◽  
Storage Devices ◽  
Li Ion ◽  
Core Shell Nanoparticles

A Li-ion hybrid supercapacitor (Li-HSC) delivering high energy within seconds (excellent rate performance) with stable cycle life is one of the most highly attractive energy storage devices.

Improving Supercapacitor Energy Density via Nanocarbon Electrode Functionalization and Increasing Electrolyte Electrochemical Window

MRS Advances ◽  
2016 ◽  
Vol 1 (19) ◽  
pp. 1377-1382
Author(s):  
Uladzimir Novikau ◽  
Sviatlana Filipovich ◽  
Ihar Razanau
Keyword(s):  
Activated Carbon ◽  
Energy Storage ◽  
Energy Density ◽  
Carbon Nanomaterials ◽  
Present Report ◽  
Carbon Powder ◽  
Carbon Cloth ◽  
Energy Storage Devices ◽  
Storage Devices ◽  
Electrochemical Window

ABSTRACTThe present report is dedicated to a study of possible ways of increasing the energy density of the supercapacitor and thus, bridging the gap between the supercapacitor and the battery. Chemical functionalization of carbon nanomaterials, such as carbon nanotubes, activated carbon cloth, and activated carbon powder used as supercapacitor electrodes as well as novel aqueous electrolytes with the electrochemical window of up to 2 V are described. The hybrid approaches to energy storage mechanism in electrochemical energy storage devices are discussed. The first experimental results on the discussed hybrid energy storage devices are presented.

Inhibiting the growth of lithium dendrites at high current densities with oriented graphene foam

2018 ◽  
Vol 6 (32) ◽  
pp. 15603-15609 ◽  
Author(s):  
Yinxing Ma ◽  
Bowen Yao ◽  
Miao Zhang ◽  
Hua Bai ◽  
Gaoquan Shi
Keyword(s):  
Current Collector ◽  
High Current ◽  
Graphene Foam ◽  
Dendrite Formation ◽  
Lithium Dendrites ◽  
Current Densities ◽  
A Current

Oriented graphene foam performs well in inhibition of Li dendrite formation at 1, 2 and 5 mA cm−2 as a current collector.

scholarly journals Computational Screening of the Physical Properties of Water-in-Salt Electrolytes

2020 ◽  
Author(s):  
Trinidad Mendez-Morales ◽  
Zhujie Li ◽  
Mathieu Salanne
Keyword(s):  
Ionic Liquids ◽  
Diffusion Coefficients ◽  
Free Water ◽  
Li Ion Batteries ◽  
Energy Storage Devices ◽  
Storage Devices ◽  
New Family ◽  
Computational Screening ◽  
Potential Applications ◽  
Li Ion

Water-in-salts form a new family of electrolytes with properties distinct from the ones of conventional aqueous systems and ionic liquids. They are currently investigated for Li-ion batteries and supercapacitors applications, but to date most of the focus was put on the system based on the LiTFSI salt. Here we study the structure and the dynamics of a series of water-in-salts with different anions. They have a similar parent structure but they vary systematically through their symmetric/asymmetric feature and the length of the fluorocarbonated chains. The simulations allow to determine their tendency to nanosegregate, as well as their transport properties (viscosity, ionic conductivity, diffusion coefficients) and the amount of free water, providing useful data for potential applications in energy storage devices.

In situ growth of Cu(OH)2@FeOOH nanotube arrays on catalytically deposited Cu current collector patterns for high-performance flexible in-plane micro-sized energy storage devices

2019 ◽  
Vol 12 (1) ◽  
pp. 194-205 ◽  
Author(s):  
Jin-Qi Xie ◽  
Ya-Qiang Ji ◽  
Jia-Hui Kang ◽  
Jia-Li Sheng ◽  
Da-Sha Mao ◽  
...  
Keyword(s):  
Energy Storage ◽  
High Performance ◽  
Current Collector ◽  
Nanotube Arrays ◽  
In Situ Growth ◽  
Energy Storage Devices ◽  
Storage Devices ◽  
Supercapacitor Energy Storage ◽  
Cu Current Collector

Rationally designed interdigitated electrodes based on Cu(OH)2@FeOOH nanotube arrays are facilely converted in situ from catalytically deposited Cu current collector patterns for high-performance flexible micro-supercapacitor energy storage devices.

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