scholarly journals Stable aqueous aluminum-manganese photoelectrochemical cells with high-rate and high-efficiency abilities

2021 ◽  
Author(s):  
Shuqiang Jiao ◽  
Xuefeng Zhang ◽  
Wei-li Song ◽  
Mingyong Wang ◽  
Jiguo Tu ◽  
...  
Keyword(s):  
Energy Density ◽  
Large Scale ◽  
High Efficiency ◽  
Rate Capability ◽  
High Energy ◽  
High Rate ◽  
High Energy Density ◽  
Energy Storage Devices ◽  
Slow Kinetics ◽  
Aqueous Aluminum

Abstract Aqueous aluminum-ion batteries (AAIBs) are potential candidates for large-scale energy storage devices for their advantages of high energy density, resource abundance, low cost, safety, and environmental friendliness. Due to various redox procedures, good reversibility, and high discharge potential, the aqueous aluminum-manganese oxide battery has drawn wide attention, while the critical issues induced from slow kinetics and undesired soluble Mn2+ lead to slow charging, poor rate capability, and low energy density. However, there is very limited progress for performance improvement via conventional chemical or physical modification approaches. To overcome these challenges, an efficient photo-regulation strategy has been proposed in terms of direct radiating visible light on the cell during the galvanostatic charging and discharging. The efficient separation and transmission of photoelectrons in the photo positive electrode dramatically improves the dynamics, and fast charging and enhanced rate performance could be achieved. Photo-oxidation behavior can effectively promote the conversion of soluble Mn2+, thus further enhancing the energy density of the as-assembled aluminum-manganese battery. Furthermore, a photo-conversion efficiency of up to 1.2% has been acquired. Based on the photo-regulation strategy, the mechanism of the photoelectrochemical coupling system has been understood, which opens a promising route for achieving photoelectrochemical batteries with high energy density and fast charge.

Interfacial electron modulation of MoS2/black phosphorus heterostructure toward high-rate and high-energy density half/full sodium-ion batteries

2021 ◽  
Author(s):  
Chenrui Zhang ◽  
Tingting Liang ◽  
Huilong Dong ◽  
Junjun Li ◽  
Junyu Shen ◽  
...  
Keyword(s):  
Energy Density ◽  
Volume Expansion ◽  
Anode Materials ◽  
Large Scale ◽  
Electrochemical Reaction ◽  
High Energy ◽  
Sodium Ion ◽  
High Rate ◽  
High Energy Density ◽  
Sodium Ion Batteries

Sodium-ion batteries (SIBs) have been considered as promising candidates for large-scale energy storage. However, viable anode materials still suffer from sluggish electrochemical reaction kinetics and huge volume expansion during cycling,...

Perforated mesoporous NiO nanostructures for an enhanced pseudocapacitive performance with ultra-high rate capability and high energy density

CrystEngComm ◽  
2019 ◽  
Vol 21 (46) ◽  
pp. 7130-7140 ◽  
Author(s):  
Narasimharao Kitchamsetti ◽  
Parameshwar R. Chikate ◽  
Ranjit A. Patil ◽  
Yuan-Ron Ma ◽  
Parasharam M. Shirage ◽  
...  
Keyword(s):  
Energy Density ◽  
Rate Capability ◽  
Mesoporous Structure ◽  
High Energy ◽  
High Rate ◽  
High Energy Density ◽  
High Rate Capability ◽  
Higher Power ◽  
Power And Energy ◽  
2D Nanosheets

The morphology of NiO (1D nanobelts and 2D nanosheets) has a significant effect on the pseudocapacitive performance. The perforated and interlinked mesoporous structure of NiO nanobelts delivered higher power and energy density than nanosheets.

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.

High voltage spinel cathode materials for high energy density and high rate capability Li ion rechargeable batteries

2009 ◽  
Vol 194 (1) ◽  
pp. 526-530 ◽  
Author(s):  
Rajesh K. Katiyar ◽  
Rahul Singhal ◽  
Karina Asmar ◽  
Ricky Valentin ◽  
Ram S. Katiyar
Keyword(s):  
Energy Density ◽  
High Voltage ◽  
Rate Capability ◽  
High Energy ◽  
Rechargeable Batteries ◽  
High Rate ◽  
High Energy Density ◽  
High Rate Capability ◽  
Li Ion ◽  
Spinel Cathode

A high energy density and high rate capability flexible supercapacitor based on electro-spun highly porous SnO2@carbon nanofibers

2020 ◽  
Vol 8 (30) ◽  
pp. 15110-15121 ◽  
Author(s):  
Rasmita Barik ◽  
Vaishali Tanwar ◽  
Rajat Kumar ◽  
Pravin P. Ingole
Keyword(s):  
Energy Density ◽  
State Of The Art ◽  
Rate Capability ◽  
High Energy ◽  
High Rate ◽  
High Energy Density ◽  
High Rate Capability ◽  
Flexible Supercapacitor ◽  
Main Challenge ◽  
Highly Porous

The energy density of the present state-of-the-art materials remains the main challenge for commercial utilization of supercapacitor devices.

Stitchable supercapacitors with high energy density and high rate capability using metal nanoparticle-assembled cotton threads

2018 ◽  
Vol 6 (41) ◽  
pp. 20421-20432 ◽  
Author(s):  
Dongyeeb Shin ◽  
Cheong Hoon Kwon ◽  
Yongmin Ko ◽  
Byeongyong Lee ◽  
Seung Woo Lee ◽  
...  
Keyword(s):  
Energy Density ◽  
Rate Capability ◽  
High Energy ◽  
Metal Nanoparticle ◽  
High Rate ◽  
High Energy Density ◽  
High Rate Capability ◽  
Cotton Threads ◽  
Energy And Power Density ◽  
Highly Porous

Highly porous metallic cotton-based supercapacitors exhibited remarkable areal energy and power density, exceeding the performance of conventional 1D supercapacitors.

scholarly journals Intercalating Ultrathin MoO3 Nanobelts into MXene Film with Ultrahigh Volumetric Capacitance and Excellent Deformation for High-Energy-Density Devices

2020 ◽  
Vol 12 (1) ◽  
Author(s):  
Yuanming Wang ◽  
Xue Wang ◽  
Xiaolong Li ◽  
Rong Liu ◽  
Yang Bai ◽  
...  
Keyword(s):  
Energy Density ◽  
Rate Capability ◽  
High Energy ◽  
High Energy Density ◽  
Energy Storage Devices ◽  
Storage Devices ◽  
Symmetric Supercapacitor ◽  
Volumetric Capacitance ◽  
Valid Solution ◽  
First Time

AbstractThe restacking hindrance of MXene films restricts their development for high volumetric energy density of flexible supercapacitors toward applications in miniature, portable, wearable or implantable electronic devices. A valid solution is construction of rational heterojunction to achieve a synergistic property enhancement. The introduction of spacers such as graphene, CNTs, cellulose and the like demonstrates limited enhancement in rate capability. The combination of currently reported pseudocapacitive materials and MXene tends to express the potential capacitance of pseudocapacitive materials rather than MXene, leading to low volumetric capacitance. Therefore, it is necessary to exploit more ideal candidate materials to couple with MXene for fully expressing both potentials. Herein, for the first time, high electrochemically active materials of ultrathin MoO3 nanobelts are intercalated into MXene films. In the composites, MoO3 nanobelts not only act as pillaring components to prevent restacking of MXene nanosheets for fully expressing the MXene pseudocapacitance in acidic environment but also provide considerable pseudocapacitive contribution. As a result, the optimal M/MoO3 electrode not only achieves a breakthrough in volumetric capacitance (1817 F cm−3 and 545 F g−1), but also maintains good rate capability and excellent flexibility. Moreover, the corresponding symmetric supercapacitor likewise shows a remarkable energy density of 44.6 Wh L−1 (13.4 Wh kg−1), rendering the flexible electrode a promising candidate for application in high-energy-density energy storage devices.

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