Organic-based active electrode materials for potassium batteries: status and perspectives

2020 ◽  
Vol 8 (34) ◽  
pp. 17296-17325
Author(s):  
Roman R. Kapaev ◽  
Pavel A. Troshin
Keyword(s):  
Energy Density ◽  
Electrode Materials ◽  
Rate Capability ◽  
Cycling Stability ◽  
Active Materials ◽  
Active Electrode ◽  
Density Rate

Performance of organic-based active materials for K-based batteries is reviewed and compared with the best inorganic analogs. Key strategies for improving energy density, rate capability and cycling stability are discussed.

scholarly journals Nanostructure selenium compounds as pseudocapacitive electrodes for high-performance asymmetric supercapacitor

2018 ◽  
Vol 5 (1) ◽  
pp. 171186 ◽  
Author(s):  
Guofu Ma ◽  
Fengting Hua ◽  
Kanjun Sun ◽  
Enke Fenga ◽  
Hui Peng ◽  
...  
Keyword(s):  
Electrode Materials ◽  
Rate Capability ◽  
Negative Electrode ◽  
High Specific Capacitance ◽  
High Energy ◽  
Cycling Stability ◽  
High Energy Density ◽  
Storage Device ◽  
Asymmetric Supercapacitor ◽  
Capacitance Performance

The electrochemical performance of an energy conversion and storage device like the supercapacitor mainly depends on the microstructure and morphology of the electrodes. In this paper, to improve the capacitance performance of the supercapacitor, the all-pseudocapacitive electrodes of lamella-like Bi 18 SeO 29 /BiSe as the negative electrode and flower-like Co 0.85 Se nanosheets as the positive electrode are synthesized by using a facile low-temperature one-step hydrothermal method. The microstructures and morphology of the electrode materials are carefully characterized, and the capacitance performances are also tested. The Bi 18 SeO 29 /BiSe and Co 0.85 Se have high specific capacitance (471.3 F g –1 and 255 F g –1 at 0.5 A g –1 ), high conductivity, outstanding cycling stability, as well as good rate capability. The assembled asymmetric supercapacitor completely based on the pseudocapacitive electrodes exhibits outstanding cycling stability (about 93% capacitance retention after 5000 cycles). Moreover, the devices exhibit high energy density of 24.2 Wh kg –1 at a power density of 871.2 W kg –1 in the voltage window of 0–1.6 V with 2 M KOH solution.

Design and synthesis of hierarchical mesoporous WO3-MnO2 composite nanostructures on carbon cloth for high-performance supercapacitors

2017 ◽  
Vol 3 (1) ◽  
Author(s):  
Pragati A. Shinde ◽  
Vaibhav C. Lokhande ◽  
Amar M. Patil ◽  
Taeksoo Ji ◽  
Chandrakant D. Lokhande
Keyword(s):  
Energy Density ◽  
High Performance ◽  
Rational Design ◽  
Electrode Materials ◽  
Mesoporous Structure ◽  
Carbon Cloth ◽  
Power Performance ◽  
Active Electrode ◽  
Composite Nanostructures ◽  
Design And Synthesis

AbstractTo enhance the energy density and power performance of supercapacitors, the rational design and synthesis of active electrode materials with hierarchical mesoporous structure is highly desired. In the present work, fabrication of high-performance hierarchical mesoporous WO

Co-Electrodeposited porous PEDOT–CNT microelectrodes for integrated micro-supercapacitors with high energy density, high rate capability, and long cycling life

Nanoscale ◽  
2019 ◽  
Vol 11 (16) ◽  
pp. 7761-7770 ◽  
Author(s):  
Muhammad Tahir ◽  
Liang He ◽  
Waqas Ali Haider ◽  
Wei Yang ◽  
Xufeng Hong ◽  
...  
Keyword(s):  
Energy Density ◽  
Rate Capability ◽  
High Energy ◽  
Cycling Stability ◽  
High Rate ◽  
High Energy Density ◽  
High Rate Capability ◽  
Excellent Cycling Stability ◽  
Cycling Life

Microstructuring of the PEDOT–CNT composite for microsupercapacitors with high rate capability and excellent cycling stability.

The hybrid nanostructure of MnCo2O4.5 nanoneedle/carbon aerogel for symmetric supercapacitors with high energy density

Nanoscale ◽  
2015 ◽  
Vol 7 (34) ◽  
pp. 14401-14412 ◽  
Author(s):  
Pin Hao ◽  
Zhenhuan Zhao ◽  
Liyi Li ◽  
Chia-Chi Tuan ◽  
Haidong Li ◽  
...  
Keyword(s):  
Energy Density ◽  
Specific Capacitance ◽  
Rate Capability ◽  
Carbon Aerogel ◽  
High Energy ◽  
Cycling Stability ◽  
High Energy Density ◽  
Hybrid Nanostructure

A porous MnCo2O4.5 nanoneedle/carbon aerogel hybrid nanostructure was synthesized. The synergy of merits of the two kinds of supercapacitors endows the hybrid nanostructure with enhanced specific capacitance, rate capability, energy density and cycling stability.

scholarly journals Electroactive Ultra-Thin rGO-Enriched FeMoO4 Nanotubes and MnO2 Nanorods as Electrodes for High-Performance All-Solid-State Asymmetric Supercapacitors

Nanomaterials ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 289 ◽  
Author(s):  
Kugalur Shanmugam Ranjith ◽  
Ganji Seeta Rama Raju ◽  
Nilesh R. Chodankar ◽  
Seyed Majid Ghoreishian ◽  
Cheol Hwan Kwak ◽  
...  
Keyword(s):  
Active Sites ◽  
Electrode Materials ◽  
High Current Density ◽  
Rate Capability ◽  
Negative Electrode ◽  
High Energy ◽  
Cycling Stability ◽  
Operating Voltage ◽  
Carbon Cloth ◽  
Wide Operating

A flexible asymmetric supercapacitor (ASC) with high electrochemical performance was constructed using reduced graphene oxide (rGO)-wrapped redox-active metal oxide-based negative and positive electrodes. Thin layered rGO functionality on the positive and the negative electrode surfaces has promoted the feasible surface-active sites and enhances the electrochemical response with a wide operating voltage window. Herein we report the controlled growth of rGO-wrapped tubular FeMoO4 nanofibers (NFs) via electrospinning followed by surface functionalization as a negative electrode. The tubular structure offers the ultrathin-layer decoration of rGO inside and outside of the tubular walls with uniform wrapping. The rGO-wrapped tubular FeMoO4 NF electrode exhibited a high specific capacitance of 135.2 F g−1 in Na2SO4 neutral electrolyte with an excellent rate capability and cycling stability (96.45% in 5000 cycles) at high current density. Meanwhile, the hydrothermally synthesized binder-free rGO/MnO2 nanorods on carbon cloth (rGO-MnO2@CC) were selected as cathode materials due to their high capacitance and high conductivity. Moreover, the ASC device was fabricated using rGO-wrapped FeMoO4 on carbon cloth (rGO-FeMoO4@CC) as the negative electrode and rGO-MnO2@CC as the positive electrode (rGO-FeMoO4@CC/rGO-MnO2@CC). The rationally designed ASC device delivered an excellent energy density of 38.8 W h kg−1 with a wide operating voltage window of 0.0–1.8 V. The hybrid ASC showed excellent cycling stability of 93.37% capacitance retention for 5000 cycles. Thus, the developed rGO-wrapped FeMoO4 nanotubes and MnO2 nanorods are promising hybrid electrode materials for the development of wide-potential ASCs with high energy and power density.

A flexible hybrid capacitor based NiCo2S4 nanowire electrode with an ultrahigh capacitance

2021 ◽  
Author(s):  
Tong Xia ◽  
Ying Liu ◽  
Meizhen Dai ◽  
Qing Xia ◽  
Xiang Wu
Keyword(s):  
Energy Density ◽  
Electrode Materials ◽  
High Energy ◽  
Cycling Stability ◽  
High Energy Density ◽  
Actual Performance ◽  
Excellent Cycling Stability

It is well known that the excellent cycling stability and high energy density of electrode materials is very important for supercapacitor. However, their actual performance far falls behind and does...

Sn-Based Nanocomposite for Li-Ion Battery Anode with High Energy Density, Rate Capability, and Reversibility

ACS Nano ◽  
2018 ◽  
Vol 12 (3) ◽  
pp. 2955-2967 ◽  
Author(s):  
Min-Gu Park ◽  
Dong-Hun Lee ◽  
Heechul Jung ◽  
Jeong-Hee Choi ◽  
Cheol-Min Park
Keyword(s):  
Energy Density ◽  
Rate Capability ◽  
High Energy ◽  
High Energy Density ◽  
Li Ion Battery ◽  
Li Ion ◽  
Battery Anode ◽  
Density Rate

Highly rate and cycling stable electrode materials constructed from polyaniline/cellulose nanoporous microspheres

2015 ◽  
Vol 3 (32) ◽  
pp. 16424-16429 ◽  
Author(s):  
Dingfeng Xu ◽  
Xu Xiao ◽  
Jie Cai ◽  
Jun Zhou ◽  
Lina Zhang
Keyword(s):  
Hydrogen Bonding ◽  
Ion Channels ◽  
Phytic Acid ◽  
Electrode Materials ◽  
Rate Capability ◽  
Cycling Stability ◽  
High Rate ◽  
High Rate Capability ◽  
Highly Efficient ◽  
Excellent Cycling Stability

Highly efficient electrode materials were constructed from polyaniline/cellulose microspheres (PANI/PA/CM)viaphytic acid (PA) as “bridge” through hydrogen bonding. The electrodes exhibited excellent cycling stability and high rate capability as a result of the superior affinity of cellulose with the electrolyte and the homogeneous nanoporous architecture, leading to good ion channels.

scholarly journals New Limits for Stability of Supercapacitor Electrode Material Based on Graphene Derivative

Nanomaterials ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 1731
Author(s):  
Veronika Šedajová ◽  
Petr Jakubec ◽  
Aristides Bakandritsos ◽  
Václav Ranc ◽  
Michal Otyepka
Keyword(s):  
Large Scale ◽  
Electrode Materials ◽  
High Current Density ◽  
Rate Capability ◽  
Cycling Stability ◽  
Supercapacitor Electrode ◽  
Promising Alternative ◽  
Practical Applications ◽  
High Durability ◽  
Graphene Derivatives

Supercapacitors offer a promising alternative to batteries, especially due to their excellent power density and fast charging rate capability. However, the cycling stability and material synthesis reproducibility need to be significantly improved to enhance the reliability and durability of supercapacitors in practical applications. Graphene acid (GA) is a conductive graphene derivative dispersible in water that can be prepared on a large scale from fluorographene. Here, we report a synthesis protocol with high reproducibility for preparing GA. The charging/discharging rate stability and cycling stability of GA were tested in a two-electrode cell with a sulfuric acid electrolyte. The rate stability test revealed that GA could be repeatedly measured at current densities ranging from 1 to 20 A g−1 without any capacitance loss. The cycling stability experiment showed that even after 60,000 cycles, the material kept 95.3% of its specific capacitance at a high current density of 3 A g−1. The findings suggested that covalent graphene derivatives are lightweight electrode materials suitable for developing supercapacitors with extremely high durability.

An adaptive and stable bio-electrolyte for rechargeable Zn-ion batteries

2018 ◽  
Vol 6 (26) ◽  
pp. 12237-12243 ◽  
Author(s):  
Silan Zhang ◽  
Nengsheng Yu ◽  
Sha Zeng ◽  
Susheng Zhou ◽  
Minghai Chen ◽  
...  
Keyword(s):  
Energy Density ◽  
Power Density ◽  
Rate Capability ◽  
Density Rate

An adaptive and stable gum bio-electrolyte was developed, which enabled Zn-ion batteries that have very competitive performances in terms of capacity, energy density, power density, rate capability and cyclability.

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