scholarly journals Ultra-small Fe3O4 nanodots encapsulated in layered carbon nanosheets with fast kinetics for lithium/potassium-ion battery anodes

RSC Advances ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 1261-1270
Author(s):  
Qianqian Peng ◽  
Chuan Guo ◽  
Shuo Qi ◽  
Weiwei Sun ◽  
Li-Ping Lv ◽  
...  
Keyword(s):  
Reaction Kinetics ◽  
Robust Stability ◽  
Potassium Ion ◽  
High Conductivity ◽  
Fast Reaction ◽  
Fast Kinetics ◽  
Carbon Nanosheets

Ultra-small Fe3O4 nanodots encapsulated in layered carbon nanosheet nanocomposites were synthesized, showing fast reaction kinetics, high conductivity, and robust stability.

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.

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.

PET-RAFT single unit monomer insertion of β-methylstyrene derivatives: RAFT degradation and reaction selectivity

2021 ◽  
Author(s):  
Lei Zhang ◽  
Ruizhe Liu ◽  
Shiyang Lin ◽  
Jiangtao Xu
Keyword(s):  
Reaction Kinetics ◽  
Single Unit ◽  
Chain Transfer ◽  
Fast Reaction ◽  
Reaction Selectivity ◽  
Reversible Addition

Reversible addition-fragmentation chain transfer (RAFT) single unit monomer insertion (SUMI) of β-Methylstyrene derivatives into diverse RAFT agents presented fast reaction kinetics, but a significant degradation of the SUMI products occurred...

Phytic Acid Induced Nitrogen Configuration Adjustment of Active Nitrogen-Rich Carbon Nanosheets for High-Performance Potassium-Ion Storage

2021 ◽  
Author(s):  
Ma Liang ◽  
Zhibin Li ◽  
Jinliang Li ◽  
Yao Dai ◽  
Chen Qian ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
Phytic Acid ◽  
High Performance ◽  
Nitrogen Doping ◽  
Potassium Ion ◽  
Active Nitrogen ◽  
Carbon Nanosheets ◽  
Ion Storage

As a conventional modification approach, nitrogen doping in carbon can greatly improve the electrochemical performance for potassium (K)-ion storage. However, we realized that the improvement of electrochemical performance by simple...

Fast reaction kinetics of porphyrin dimerization in aqueous solution

1970 ◽  
Vol 92 (11) ◽  
pp. 3312-3316 ◽  
Author(s):  
Radha R. Das ◽  
Robert F. Pasternack ◽  
Robert A. Plane
Keyword(s):  
Aqueous Solution ◽  
Reaction Kinetics ◽  
Fast Reaction ◽  
Kinetics Of

Edge-nitrogen enriched carbon nanosheets for potassium-ion battery anodes with an ultrastable cycling stability

Carbon ◽  
2021 ◽  
Author(s):  
Kainian Chu ◽  
Xiaojuan Zhang ◽  
Yang Yang ◽  
Zhiqiang Li ◽  
Lingzhi Wei ◽  
...  
Keyword(s):  
Potassium Ion ◽  
Cycling Stability ◽  
Carbon Nanosheets
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