Achieving high rate and high energy density in an all-solid-state flexible asymmetric pseudocapacitor through the synergistic design of binder-free 3D ZnCo2O4 nano polyhedra and 2D layered Ti3C2Tx-MXenes

2019 ◽  
Vol 7 (42) ◽  
pp. 24543-24556 ◽  
Author(s):  
Muhammad Sufyan Javed ◽  
Hang Lei ◽  
Hidayat Ullah Shah ◽  
Sumreen Asim ◽  
Rizwan Raza ◽  
...  
Keyword(s):  
Solid State ◽  
Energy Density ◽  
Electrochemical Performance ◽  
High Energy ◽  
High Rate ◽  
High Energy Density ◽  
Excellent Electrochemical Performance ◽  
Binder Free ◽  
High Flexibility ◽  
Pva Hydrogel

Flexible ZCO‖MXene-ASC exhibits excellent electrochemical performance in a KOH/PVA hydrogel electrolyte with outstanding cycling stability in an enlarged potential window of 0.0–1.6 V with high flexibility.

Significantly improved conductivity of spinel Co3O4 porous nanowires partially substituted by Sn in tetrahedral sites for high-performance quasi-solid-state supercapacitors

2021 ◽  
Vol 9 (11) ◽  
pp. 7005-7017
Author(s):  
Yunjian Chen ◽  
Jia Zhu ◽  
Ni Wang ◽  
Huanyu Cheng ◽  
Xianzhong Tang ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Solid State ◽  
Energy Density ◽  
Electrochemical Performance ◽  
High Performance ◽  
High Energy ◽  
High Energy Density ◽  
Partial Substitution ◽  
Tetrahedral Sites ◽  
Excellent Electrochemical Performance

The partial substitution of Sn in spinel-structured Co3O4 exhibits excellent electrochemical performance, including good electrical conductivity, high energy density, power density and cycling retention, as a positive electrode for supercapacitors.

Bifunctional iron disulfide nanoellipsoids for high energy density supercapacitor and electrocatalytic oxygen evolution applications

2019 ◽  
Vol 6 (3) ◽  
pp. 659-670 ◽  
Author(s):  
Zhiqin Sun ◽  
Xue Yang ◽  
Huiming Lin ◽  
Feng Zhang ◽  
Qian Wang ◽  
...  
Keyword(s):  
Energy Density ◽  
Electrochemical Performance ◽  
Oxygen Evolution ◽  
High Energy ◽  
High Energy Density ◽  
Microwave Assisted ◽  
Iron Disulfide ◽  
Excellent Electrochemical Performance ◽  
Microwave Assisted Method

FeS2, prepared using a rapid microwave assisted method, exhibits excellent electrochemical performance for supercapacitor and OER applications.

High-energy density nanofiber-based solid-state supercapacitors

2016 ◽  
Vol 4 (1) ◽  
pp. 160-166 ◽  
Author(s):  
Daniel W. Lawrence ◽  
Chau Tran ◽  
Arun T. Mallajoysula ◽  
Stephen K. Doorn ◽  
Aditya Mohite ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Solid State ◽  
Energy Density ◽  
Electric Double Layer ◽  
Carbon Nanofiber ◽  
High Energy ◽  
High Energy Density ◽  
Gel Electrolytes ◽  
Porous Carbon Nanofiber ◽  
Binder Free

We have developed binder-free solid-state electric double layer supercapacitors using freestanding porous carbon nanofiber electrodes fabricated using electrospinning and silica-based ionic liquid gel electrolytes.

scholarly journals Self-Supported Sheets-on-Wire CuO@Ni(OH)2/Zn(OH)2 Nanoarrays for High-Performance Flexible Quasi-Solid-State Supercapacitor

Processes ◽  
2021 ◽  
Vol 9 (4) ◽  
pp. 680
Author(s):  
Jianyang Jiang ◽  
Xiong Xiong Liu ◽  
Jiayu Han ◽  
Ke Hu ◽  
Jun Song Chen
Keyword(s):  
Solid State ◽  
Energy Density ◽  
Electrode Materials ◽  
Red Light ◽  
High Capacity ◽  
High Energy ◽  
High Rate ◽  
High Energy Density ◽  
Supercapacitor Application ◽  
Charge Discharge

Transition metal hydroxides have attracted a lot of attention as the electrode materials for supercapacitors owing to their relatively high theoretical capacity, low cost, and facile preparation methods. However, their low intrinsic conductivity deteriorates their high-rate performance and cycling stability. Here, self-supported sheets-on-wire CuO@Ni(OH)2/Zn(OH)2 (CuO@NiZn) composite nanowire arrays were successfully grown on copper foam. The CuO nanowire backbone provided enhanced structural stability and a highly efficient electron-conducting pathway from the active hydroxide nanosheets to the current collector. The resulting CuO@NiZn as the battery-type electrode for supercapacitor application delivered a high capacity of 306.2 mAh g−1 at a current density of 0.8 A g−1 and a very stable capacity of 195.1 mAh g−1 at 4 A g−1 for 10,000 charge–discharge cycles. Furthermore, a quasi-solid-state hybrid supercapacitor (qss HSC) was assembled with active carbon, exhibiting 125.3 mAh g−1 at 0.8 A g−1 and a capacity of 41.6 mAh g−1 at 4 A g−1 for 5000 charge–discharge cycles. Furthermore, the qss HSC was able to deliver a high energy density of about 116.0 Wh kg−1. Even at the highest power density of 7.8 kW kg−1, an energy density of 20.5 Wh kg−1 could still be obtained. Finally, 14 red light-emitting diodes were lit up by a single qss HSC at different bending states, showing good potential for flexible energy storage applications.

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