A new benzimidazole based covalent organic polymer having high energy storage capacity

2016 ◽  
Vol 52 (48) ◽  
pp. 7592-7595 ◽  
Author(s):  
Bidhan C. Patra ◽  
Santimoy Khilari ◽  
Lanka Satyanarayana ◽  
Debabrata Pradhan ◽  
Asim Bhaumik
Keyword(s):  
Energy Storage ◽  
Specific Capacitance ◽  
Storage Capacity ◽  
High Energy ◽  
Polymerization Reaction ◽  
Organic Polymer ◽  
Cyclic Stability ◽  
Condensation Polymerization ◽  
Energy Storage Capacity ◽  
High Energy Storage

A new benzimidazole-based covalent organic polymer has been synthesized through the condensation polymerization reaction and has shown a high energy storage capacity with a specific capacitance of 335 F g−1 at 2 mV s−1 scan rate and good cyclic stability with 93% retention of its initial specific capacitance after 1000 cycles.

scholarly journals Scaling laws of compliant elements for high energy storage capacity in robotics

2019 ◽  
Vol 139 ◽  
pp. 482-505 ◽  
Author(s):  
Elias Saerens ◽  
Raphaël Furnémont ◽  
Tom Verstraten ◽  
Pablo López García ◽  
Stein Crispel ◽  
...  
Keyword(s):  
Energy Storage ◽  
Scaling Laws ◽  
Storage Capacity ◽  
High Energy ◽  
Energy Storage Capacity ◽  
High Energy Storage

A novel synthetic approach for designing metal-free, redox-active quinoxaline-benzimidazole-based organic polymers with high energy storage capacity

2019 ◽  
Vol 43 (37) ◽  
pp. 14806-14817
Author(s):  
Pravin S. Salunkhe ◽  
Yuvraj S. Patil ◽  
Indrajeet A. Dhole ◽  
Basavraj S. Kalshetti ◽  
Vikas B. Patil ◽  
...  
Keyword(s):  
Energy Storage ◽  
Storage Capacity ◽  
High Energy ◽  
Synthetic Approach ◽  
Organic Polymers ◽  
Metal Free ◽  
Redox Active ◽  
Energy Storage Capacity ◽  
Energy Storage Applications ◽  
High Energy Storage

We established the first use of thiophene integrated with a quinoxaline-benzimidazole unit for energy storage applications and delivered strategies for further developments in the performance of such materials.

Composition and strain engineered AgNbO3-based multilayer capacitors for ultra-high energy storage capacity

2021 ◽  
Vol 9 (15) ◽  
pp. 9655-9664
Author(s):  
Li-Feng Zhu ◽  
Lei Zhao ◽  
Yongke Yan ◽  
Haoyang Leng ◽  
Xiaotian Li ◽  
...  
Keyword(s):  
Energy Storage ◽  
Storage Capacity ◽  
High Energy ◽  
Energy Storage Density ◽  
Ultra High Energy ◽  
Storage Density ◽  
Energy Storage Capacity ◽  
Multilayer Capacitors ◽  
High Energy Storage Density ◽  
High Energy Storage

With strain engineer and MnO2 addition, an ultra-high energy-storage density Wrec = 7.9 J cm−3 and efficiency η = 71% were achieved in Ag(Nb0.85Ta0.15)O3 + 0.25 wt% MnO2 multilayer capacitors.

Rational design of flower-like Co–Zn LDH@Co(H2PO4)2 heterojunctions as advanced electrode materials for supercapacitors

2021 ◽  
Vol 50 (13) ◽  
pp. 4643-4650
Author(s):  
Miao He ◽  
Yi He ◽  
Xinyi Zhou ◽  
Qiang Hu ◽  
Shixiang Ding ◽  
...  
Keyword(s):  
Energy Storage ◽  
Specific Capacitance ◽  
Rational Design ◽  
Electrode Materials ◽  
Storage Capacity ◽  
Energy Storage Capacity

The device exhibits 95.3% retention in specific capacitance after 5000 cycles and possesses superior energy-storage capacity.

scholarly journals B, N Dual Doped Coral-Like Carbon Framework With Superior Pseudocapacitance and Surface Wettability

2021 ◽  
Vol 8 ◽  
Author(s):  
Lu Han ◽  
Xu Chen ◽  
Shijie Zeng ◽  
Jia Liu ◽  
Zhongli Yang ◽  
...  
Keyword(s):  
Energy Storage ◽  
Electrode Materials ◽  
Storage Capacity ◽  
High Energy ◽  
Cycling Stability ◽  
Surface Wettability ◽  
High Energy Density ◽  
Carbon Framework ◽  
Energy Storage Capacity ◽  
Carbon Based

Carbon-based materials are usually considered as conventional electrode materials for supercapacitors (SCs), therefore it is meaningful to enhance supercapacitive capacity and cycling stability via rational surface structure design of carbon-based materials. The bio-inspired coral-like porous carbon structure has attracted much attention recently in that it can offer large surface area for ion accommodation and favor ions-diffusion, promoting its energy storage capacity. Herein, we designed a superiorly hydrophilic B, N dual doped coral-like carbon framework (BN-CCF) and studied its surface wettability via low-field nuclear magnetic resonance relaxation technique. The unique coral-like micro-nano structure and B, N dual doping in carbon framework can enhance its pseudocapacitance and improve surface wettability. Therefore, when used as electrodes of SCs, the BN-CCF displays 457.5 F g−1 at 0.5 A g−1, even when current density increases 20 folds, it still exhibits high capacitance retention of 66.1% and superior cycling stability. The symmetrical SCs assembled by BN-CCF electrodes show a high energy density of 14.92 Wh kg−1 (600 W kg−1). In this work, simple structural regulation with B, N dual doping and surface wettability should be considered as effective strategy to enhance energy storage capacity of carbon-based SCs.

scholarly journals Constant-volume vapor-liquid equilibrium for thermal energy storage: Generalized analysis of pure fluids

2020 ◽  
Vol 197 ◽  
pp. 01001
Author(s):  
Abdullah Bamoshmoosh ◽  
Gianluca Valenti
Keyword(s):  
Energy Storage ◽  
Energy Density ◽  
Thermal Energy ◽  
Thermal Energy Storage ◽  
Storage Capacity ◽  
High Energy ◽  
Constant Volume ◽  
Temperature Range ◽  
Energy Storage Capacity ◽  
Vapor Liquid

Thermal energy storage is of great interest both for the industrial world and for the district heating and cooling sector. Available technologies present drawbacks that reduce the margin of application, such as low energy density, limited temperature range of work, and investment costs. Phase transition is one of the main phenomena that can be exploited for thermal energy storage because of its naturally high energy density. Constant-volume vapor-liquid transition shows higher flexibility and increased heat transfer properties with respect to available technologies. This work presents a description of the behavior of these types of systems. The analysis is carried out through a generalized approach using the Corresponding State Principle. Variation of internal energy as a function of temperature over a fixed range is calculated at constant volume at different values of specific volume. It is shown that, for lower specific volumes, larger temperature ranges of work can be achieved without occurring in the steep pressure increase typically given by the expansion of liquid. Maximum operating temperature range is increased by up to 20% of the critical temperature with minimal energy loss. In optimal subsets of these ranges of temperature, the energy storage capacity of vapor-liquid systems increases at lower volumes, with energy storage capacity increasing to up to 40% with a 50% increase of the reduced volume. This is especially valid for more complex fluids, which are more interesting for these applications because of their higher heat capacity.

scholarly journals Annealing and Stretching Induced High Energy Storage Properties in All-Organic Composite Dielectric Films

Materials ◽  
2018 ◽  
Vol 11 (11) ◽  
pp. 2279 ◽  
Author(s):  
Yefeng Feng ◽  
Cheng Peng ◽  
Qihuang Deng ◽  
Yandong Li ◽  
Jianbing Hu ◽  
...  
Keyword(s):  
Energy Storage ◽  
Breakdown Strength ◽  
High Energy ◽  
Organic Polymer ◽  
Dielectric Films ◽  
Ferroelectric Domains ◽  
Energy Storage Properties ◽  
Inorganic Fillers ◽  
Storage Properties ◽  
High Energy Storage

High discharged energy density and charge–discharge efficiency, in combination with high electric breakdown strength, maximum electric displacement and low residual displacement, are very difficult to simultaneously achieve in single-component polymer dielectrics. Plenty of researches have reported polymer based composite dielectrics filled with inorganic fillers, through complex surface modification of inorganic fillers to improve interface compatibility. In this work, a novel strategy of introducing environmentally-friendly biological polyester into fluoropolymer matrix has been presented to prepare all-organic polymer composites with desirable high energy storage properties by solution cast process (followed by annealing or stretching post-treatment), in order to simplify the preparation steps and lower the cost. Fluoropolymer with substantial ferroelectric domains (contributing to high dielectric response) as matrix and poly (3-hydroxybutyrate-co-3-hydroxyvalerate) with excellent linear polarization property (resulting in high breakdown strength) as filler were employed. By high-temperature annealing, the size of ferroelectric domains could be improved and interfacial air defects could be removed, leading to elevated high energy storage density and efficiency in composite. By mono-directional stretching, the ferroelectric domains and polyester could be regularly oriented along stretching direction, resulting in desired high energy storage performances as well. Besides, linear dielectric components could contribute to high efficiency from their strong rigidity restrain effect on ferroelectric component. This work might open up the way for a facile fabrication of promising all-organic composite dielectric films with high energy storage properties.

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