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.

Carbon-based materials for lithium-ion capacitors

2019 ◽  
Vol 3 (7) ◽  
pp. 1265-1279 ◽  
Author(s):  
Xiaojun Wang ◽  
Lili Liu ◽  
Zhiqiang Niu
Keyword(s):  
Energy Density ◽  
Power Density ◽  
High Capacity ◽  
Lithium Ion ◽  
High Energy ◽  
High Rate ◽  
High Energy Density ◽  
Large Power ◽  
Excellent Stability ◽  
Carbon Based

Lithium-ion capacitors (LICs) can deliver high energy density, large power density and excellent stability since they possess a high-capacity battery-type electrode and a high rate capacitor-type electrode.

scholarly journals A New Model on Cation Distribution in Cation-Disordered Li1+xTM1-xO2 Cathodes

2019 ◽  
Author(s):  
Yang Huang ◽  
Long Liu ◽  
Min Gao
Keyword(s):  
Energy Density ◽  
Short Range ◽  
Structural Model ◽  
Electrode Materials ◽  
High Capacity ◽  
High Energy ◽  
High Energy Density ◽  
New Class ◽  
Short Range Ordering ◽  
Supercell Model

The search for new materials that could improve the energy density of Li-ion batteries (LIB) is one of today’s most challenging issues. Recently, cation-disordered lithium-excess metal oxides have emerged as a promising new class of cathode materials for LIB, due to their high reversible capacities and nice structural stability. However, a full structural model of the Li-transition metal (TM) sharing sublattice and the origin of short range ordering (SRO) of cation ions requires further investigation. In this work, we put forward a Monte Carlo strategy of building a cation-disordered rocksalt material supercell model. The cation ions of Li1.0Ti0.5Ni0.5O2 (LTNO) are placed at the FCC sublattice sites with the constraint of Pauling’s electroneutrality rule, instead of a random way. This constraint causes the Li-Ti and Ni-Ni clustering (the cation short range ordering). Based on this model, we discussed the relationship between the short range ordering, the local distorting, the theoretic capacity and the order-disorder strengths. A unified understanding of these factors in cation-disordered materials may enable a better design of disordered-electrode materials with high capacity and high energy density.

scholarly journals High Energy Density Single Crystal NMC/Li6PS5Cl Cathodes for All-Solid-State Lithium Metal Batteries

2021 ◽  
Author(s):  
Christopher Doerrer ◽  
Isaac Capone ◽  
Sudarshan Narayanan ◽  
Junliang Liu ◽  
Christopher Grovenor ◽  
...  
Keyword(s):  
Solid State ◽  
Energy Density ◽  
Single Crystal ◽  
Discharge Capacity ◽  
Coulombic Efficiency ◽  
High Capacity ◽  
Composite Cathode ◽  
High Energy ◽  
High Energy Density ◽  
Composite Cathodes

<div><div><div><p>To match the high capacity of metallic anodes, all-solid-state batteries (ASSBs) re- quire high energy density, long-lasting composite cathodes such as Ni-Mn-Co (NMC)- based lithium oxides mixed with a solid-state electrolyte (SSE). However in practice, cathode capacity typically fades due to NMC cracking and increasing NMC/SSE in- terface debonding because of NMC pulverization, which is only partially mitigated by the application of a high cell pressure during cycling. Using smart processing proto- cols we report a single crystal particulate LiNi0.83Mn0.06Co0.11O2 and Li6PS5Cl SSE composite cathode with outstanding discharge capacity of 210 mAh g−1 at 30 °C. A first cycle coulombic efficiency of >85%, and >99% thereafter, was achieved despite a 5.5% volume change during cycling. A near-practical discharge capacity at a high areal capacity of 8.7 mAh cm−2 was obtained using a novel asymmetric anode/cathode cycling pressure of only 2.5 MPa/0.2 MPa.</p></div></div></div>

Electrode materials based on α-NiCo(OH)2 and rGO for high performance energy storage devices

RSC Advances ◽  
2016 ◽  
Vol 6 (104) ◽  
pp. 102504-102512 ◽  
Author(s):  
J. M. Gonçalves ◽  
R. R. Guimarães ◽  
C. V. Nunes ◽  
A. Duarte ◽  
B. B. N. S. Brandão ◽  
...  
Keyword(s):  
Composite Material ◽  
Energy Storage ◽  
Energy Density ◽  
High Performance ◽  
Electrode Materials ◽  
High Energy ◽  
High Energy Density ◽  
Energy Storage Devices ◽  
Storage Devices ◽  
Charge Discharge

Described herein is a composite material based on rGO and α-NiCo(OH)2 nanoparticles combining very fast charge/discharge processes with the high energy density of batteries, suitable for application in high performance energy storage devices.

A quasi-solid-state Li-ion capacitor with high energy density based on Li3VO4/carbon nanofibers and electrochemically-exfoliated graphene sheets

2017 ◽  
Vol 5 (28) ◽  
pp. 14922-14929 ◽  
Author(s):  
Faxing Wang ◽  
Zaichun Liu ◽  
Xinhai Yuan ◽  
Jun Mo ◽  
Chunyang Li ◽  
...  
Keyword(s):  
Solid State ◽  
Energy Density ◽  
Carbon Nanofibers ◽  
High Energy ◽  
High Energy Density ◽  
Graphene Sheets ◽  
Ultrahigh Energy ◽  
Exfoliated Graphene ◽  
Li Ion ◽  
Charge Discharge

The quasi-solid-state Li-ion capacitor demonstrates an ultrahigh energy density of 110 W h kg−1and rapid charge/discharge capability within 2 min.

scholarly journals High Energy Density Single Crystal NMC/Li6PS5Cl Cathodes for All-Solid-State Lithium Metal Batteries

2021 ◽  
Author(s):  
Christopher Doerrer ◽  
Isaac Capone ◽  
Sudarshan Narayanan ◽  
Junliang Liu ◽  
Christopher Grovenor ◽  
...  
Keyword(s):  
Solid State ◽  
Energy Density ◽  
Single Crystal ◽  
Discharge Capacity ◽  
Coulombic Efficiency ◽  
High Capacity ◽  
Composite Cathode ◽  
High Energy ◽  
High Energy Density ◽  
Composite Cathodes

<div><div><div><p>To match the high capacity of metallic anodes, all-solid-state batteries (ASSBs) re- quire high energy density, long-lasting composite cathodes such as Ni-Mn-Co (NMC)- based lithium oxides mixed with a solid-state electrolyte (SSE). However in practice, cathode capacity typically fades due to NMC cracking and increasing NMC/SSE in- terface debonding because of NMC pulverization, which is only partially mitigated by the application of a high cell pressure during cycling. Using smart processing proto- cols we report a single crystal particulate LiNi0.83Mn0.06Co0.11O2 and Li6PS5Cl SSE composite cathode with outstanding discharge capacity of 210 mAh g−1 at 30 °C. A first cycle coulombic efficiency of >85%, and >99% thereafter, was achieved despite a 5.5% volume change during cycling. A near-practical discharge capacity at a high areal capacity of 8.7 mAh cm−2 was obtained using a novel asymmetric anode/cathode cycling pressure of only 2.5 MPa/0.2 MPa.</p></div></div></div>

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