Interlayer engineering of MoS2 nanosheets for high-rate potassium-ion storage

2020 ◽  
Vol 44 (47) ◽  
pp. 20659-20664
Author(s):  
Wei Kang ◽  
Yuchen Wang ◽  
Cuihua An
Keyword(s):  
Active Sites ◽  
Interlayer Spacing ◽  
Potassium Ion ◽  
High Rate ◽  
Rate Performance ◽  
Mos2 Nanosheets ◽  
Capacity Retention ◽  
Ion Storage

Se–MoS2 with expanded the interlayer spacing and more active sites, exhibits better rate performance (75% capacity retention) as potassium ion batteries anode.

scholarly journals High Capacity and Fast Kinetics of Potassium-Ion Batteries Boosted by Nitrogen-Doped Mesoporous Carbon Spheres

2021 ◽  
Vol 13 (1) ◽  
Author(s):  
Jiefeng Zheng ◽  
Yuanji Wu ◽  
Yong Tong ◽  
Xi Liu ◽  
Yingjuan Sun ◽  
...  
Keyword(s):  
Mesoporous Carbon ◽  
Active Sites ◽  
Carbon Materials ◽  
Potassium Ion ◽  
High Rate ◽  
Electrochemical Performances ◽  
Carbon Spheres ◽  
Fast Kinetics ◽  
Nitrogen Doped ◽  
Economic Price

AbstractIn view of rich potassium resources and their working potential, potassium-ion batteries (PIBs) are deemed as next generation rechargeable batteries. Owing to carbon materials with the preponderance of durability and economic price, they are widely employed in PIBs anode materials. Currently, porosity design and heteroatom doping as efficacious improvement strategies have been applied to the structural design of carbon materials to improve their electrochemical performances. Herein, nitrogen-doped mesoporous carbon spheres (MCS) are synthesized by a facile hard template method. The MCS demonstrate larger interlayer spacing in a short range, high specific surface area, abundant mesoporous structures and active sites, enhancing K-ion migration and diffusion. Furthermore, we screen out the pyrolysis temperature of 900 °C and the pore diameter of 7 nm as optimized conditions for MCS to improve performances. In detail, the optimized MCS-7-900 electrode achieves high rate capacity (107.9 mAh g−1 at 5000 mA g−1) and stably brings about 3600 cycles at 1000 mA g−1. According to electrochemical kinetic analysis, the capacitive-controlled effects play dominant roles in total storage mechanism. Additionally, the full-cell equipped MCS-7-900 as anode is successfully constructed to evaluate the practicality of MCS.

Bismuthene from sonoelectrochemistry as a superior anode for potassium-ion batteries

2020 ◽  
Vol 8 (1) ◽  
pp. 453-460 ◽  
Author(s):  
Chao Shen ◽  
Tianle Cheng ◽  
Chunyan Liu ◽  
Lu Huang ◽  
Mengyang Cao ◽  
...  
Keyword(s):  
Force Field ◽  
External Force ◽  
Potassium Ion ◽  
Cycle Life ◽  
High Rate ◽  
Rate Performance ◽  
Electrochemical Exfoliation ◽  
Long Cycle Life ◽  
External Force Field ◽  
High Rate Performance

An external force field-assisted electrochemical exfoliation method was adopted to produce few-layered bismuthene nanosheets (FBNs). These FBNs exhibited a high rate performance and ultra-long cycle life for KIBs anode.

scholarly journals Co9S8@carbon nanofiber as the high-performance anode for potassium-ion storage

RSC Advances ◽  
2021 ◽  
Vol 11 (25) ◽  
pp. 15416-15421
Author(s):  
Wen Xin ◽  
Zhixuan Wei ◽  
Shiyu Yao ◽  
Nan Chen ◽  
Chunzhong Wang ◽  
...  
Keyword(s):  
Carbon Nanofibers ◽  
Volume Expansion ◽  
High Performance ◽  
Carbon Nanofiber ◽  
Potassium Ion ◽  
Rate Performance ◽  
Active Electrode ◽  
Fast Kinetics ◽  
Highly Active ◽  
Ion Storage

Co9S8@carbon nanofibers with boosted highly active electrode–electrolyte area, fast kinetics and controlled volume expansion show an excellent cycling and rate performance in potassium ion batteries.

Introducing a conductive pillar: a polyaniline intercalated layered titanate for high-rate and ultra-stable sodium and potassium ion storage

2020 ◽  
Vol 56 (60) ◽  
pp. 8392-8395 ◽  
Author(s):  
Jiaying Liao ◽  
Qiao Hu ◽  
Jinxiao Mu ◽  
Fei Chen ◽  
Xiaodong He ◽  
...  
Keyword(s):  
Potassium Ion ◽  
High Rate ◽  
Layered Titanate ◽  
Ion Storage ◽  
Sodium And Potassium

An in situ formed polyaniline pillared layered titanate with uniform TiO2 coating for sodium and potassium ion storage is proposed.

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