La/Mn Codoped AgNbO3 Lead-Free Antiferroelectric Ceramics with Large Energy Density and Power Density

2018 ◽  
Vol 6 (12) ◽  
pp. 16151-16159 ◽  
Author(s):  
Chenhong Xu ◽  
Zhengqian Fu ◽  
Zhen Liu ◽  
Lei Wang ◽  
Shiguang Yan ◽  
...  
Keyword(s):  
Energy Density ◽  
Power Density ◽  
Lead Free ◽  
Large Energy

scholarly journals Flexible lead-free BFO-based dielectric capacitor with large energy density, superior thermal stability, and reliable bending endurance

2020 ◽  
Vol 6 (1) ◽  
pp. 200-208 ◽  
Author(s):  
Changhong Yang ◽  
Jin Qian ◽  
Panpan Lv ◽  
Haitao Wu ◽  
Xiujuan Lin ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Energy Density ◽  
Lead Free ◽  
Large Energy

Synthetic atoms: Large energy density and a record power density

Complexity ◽  
2013 ◽  
Vol 18 (4) ◽  
pp. 12-14
Author(s):  
Alfred Hubler
Keyword(s):  
Energy Density ◽  
Power Density ◽  
Large Energy

Large energy density with excellent stability in fine-grained (Bi0.5Na0.5)TiO3-based lead-free ceramics

2019 ◽  
Vol 39 (14) ◽  
pp. 4053-4059 ◽  
Author(s):  
Xuefan Zhou ◽  
He Qi ◽  
Zhongna Yan ◽  
Guoliang Xue ◽  
Hang Luo ◽  
...  
Keyword(s):  
Energy Density ◽  
Lead Free ◽  
Large Energy ◽  
Fine Grained ◽  
Lead Free Ceramics ◽  
Excellent Stability

Large Energy Density, Excellent Thermal Stability, and High Cycling Endurance of Lead-Free BaZr0.2Ti0.8O3 Film Capacitors

2017 ◽  
Vol 9 (20) ◽  
pp. 17096-17101 ◽  
Author(s):  
Zixiong Sun ◽  
Chunrui Ma ◽  
Xi Wang ◽  
Ming Liu ◽  
Lu Lu ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Energy Density ◽  
Lead Free ◽  
Large Energy ◽  
Excellent Thermal Stability

NaNbO3-CaTiO3 lead-free relaxor antiferroelectric ceramics featuring giant energy density, high energy efficiency and power density

2022 ◽  
Vol 429 ◽  
pp. 132534
Author(s):  
Aiwen Xie ◽  
Jian Fu ◽  
Ruzhong Zuo ◽  
Cong Zhou ◽  
Zhenliang Qiao ◽  
...  
Keyword(s):  
Energy Efficiency ◽  
Energy Density ◽  
Power Density ◽  
High Energy ◽  
Lead Free ◽  
High Energy Efficiency

scholarly journals Na0.76V6O15/Activated Carbon Hybrid Cathode for High-Performance Lithium-Ion Capacitors

Materials ◽  
2020 ◽  
Vol 14 (1) ◽  
pp. 122
Author(s):  
Renwei Lu ◽  
Xiaolong Ren ◽  
Chong Wang ◽  
Changzhen Zhan ◽  
Ding Nan ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Energy Density ◽  
Power Density ◽  
Cathode Materials ◽  
Low Cost ◽  
Lithium Ion ◽  
High Energy ◽  
Cycling Stability ◽  
High Energy Density ◽  
Artificial Graphite

Lithium-ion hybrid capacitors (LICs) are regarded as one of the most promising next generation energy storage devices. Commercial activated carbon materials with low cost and excellent cycling stability are widely used as cathode materials for LICs, however, their low energy density remains a significant challenge for the practical applications of LICs. Herein, Na0.76V6O15 nanobelts (NaVO) were prepared and combined with commercial activated carbon YP50D to form hybrid cathode materials. Credit to the synergism of its capacitive effect and diffusion-controlled faradaic effect, NaVO/C hybrid cathode displays both superior cyclability and enhanced capacity. LICs were assembled with the as-prepared NaVO/C hybrid cathode and artificial graphite anode which was pre-lithiated. Furthermore, 10-NaVO/C//AG LIC delivers a high energy density of 118.9 Wh kg−1 at a power density of 220.6 W kg−1 and retains 43.7 Wh kg−1 even at a high power density of 21,793.0 W kg−1. The LIC can also maintain long-term cycling stability with capacitance retention of approximately 70% after 5000 cycles at 1 A g−1. Accordingly, hybrid cathodes composed of commercial activated carbon and a small amount of high energy battery-type materials are expected to be a candidate for low-cost advanced LICs with both high energy density and power density.

scholarly journals In Situ Fabrication of Activated Carbon from a Bio-Waste Desmostachya bipinnata for the Improved Supercapacitor Performance

2021 ◽  
Vol 16 (1) ◽  
Author(s):  
Gopal Krishna Gupta ◽  
Pinky Sagar ◽  
Sumit Kumar Pandey ◽  
Monika Srivastava ◽  
A. K. Singh ◽  
...  
Keyword(s):  
Activated Carbon ◽  
Energy Density ◽  
Power Density ◽  
Supercapacitor Electrode ◽  
In Situ Fabrication ◽  
Transmission Electron ◽  
Good Energy ◽  
Supercapacitor Performance ◽  
Operating Potential

AbstractHerein, we demonstrate the fabrication of highly capacitive activated carbon (AC) using a bio-waste Kusha grass (Desmostachya bipinnata), by employing a chemical process followed by activation through KOH. The as-synthesized few-layered activated carbon has been confirmed through X-ray powder diffraction, transmission electron microscopy, and Raman spectroscopy techniques. The chemical environment of the as-prepared sample has been accessed through FTIR and UV–visible spectroscopy. The surface area and porosity of the as-synthesized material have been accessed through the Brunauer–Emmett–Teller method. All the electrochemical measurements have been performed through cyclic voltammetry and galvanometric charging/discharging (GCD) method, but primarily, we focus on GCD due to the accuracy of the technique. Moreover, the as-synthesized AC material shows a maximum specific capacitance as 218 F g−1 in the potential window ranging from − 0.35 to + 0.45 V. Also, the AC exhibits an excellent energy density of ~ 19.3 Wh kg−1 and power density of ~ 277.92 W kg−1, respectively, in the same operating potential window. It has also shown very good capacitance retention capability even after 5000th cycles. The fabricated supercapacitor shows a good energy density and power density, respectively, and good retention in capacitance at remarkably higher charging/discharging rates with excellent cycling stability. Henceforth, bio-waste Kusha grass-derived activated carbon (DP-AC) shows good promise and can be applied in supercapacitor applications due to its outstanding electrochemical properties. Herein, we envision that our results illustrate a simple and innovative approach to synthesize a bio-waste Kusha grass-derived activated carbon (DP-AC) as an emerging supercapacitor electrode material and widen its practical application in electrochemical energy storage fields.

Ionophobic nanopore enhancing capacitance and charging dynamics in supercapacitor with ionic liquids

2021 ◽  
Author(s):  
Zhongdong Gan ◽  
Yanlei Wang ◽  
Mi Wang ◽  
Enlai Gao ◽  
Feng Huo ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Energy Density ◽  
Power Density ◽  
Porous Electrodes ◽  
Charging Dynamics

Nano-porous electrodes combined with ionic liquids (ILs) are widely favored to promote the energy density of supercapacitors. However, this is always accompanied by the reduced power density, especially considering the...

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.

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