Boosting the energy density of supercapacitors by designing both hollow NiO nanoparticles/nitrogen-doped carbon cathode and nitrogen-doped carbon anode from the same precursor

2021 ◽  
pp. 134083
Author(s):  
Chen Huang ◽  
Shengyao Lv ◽  
Aimei Gao ◽  
Jingzhou Ling ◽  
Fenyun Yi ◽  
...  
Keyword(s):  
Energy Density ◽  
Carbon Anode ◽  
Nio Nanoparticles ◽  
Carbon Cathode ◽  
Nitrogen Doped ◽  
Nitrogen Doped Carbon

scholarly journals Ultra-Stable Potassium Ion Storage of Nitrogen-Doped Carbon Nanofiber Derived from Bacterial Cellulose

Nanomaterials ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 1130
Author(s):  
Liang Ma ◽  
Jinliang Li ◽  
Zhibin Li ◽  
Yingying Ji ◽  
Wenjie Mai ◽  
...  
Keyword(s):  
Energy Density ◽  
Bacterial Cellulose ◽  
Density Functional ◽  
Carbon Nanofiber ◽  
Specific Capacity ◽  
Relative Energy ◽  
Large Radius ◽  
Nitrogen Doped ◽  
Ion Storage ◽  
Nitrogen Doped Carbon

As a promising energy storage system, potassium (K) ion batteries (KIBs) have received extensive attention due to the abundance of potassium resource in the Earth’s crust and the similar properties of K to Li. However, the electrode always presents poor stability for K-ion storage due to the large radius of K-ions. In our work, we develop a nitrogen-doped carbon nanofiber (N-CNF) derived from bacterial cellulose by a simple pyrolysis process, which allows ultra-stable K-ion storage. Even at a large current density of 1 A g−1, our electrode exhibits a reversible specific capacity of 81 mAh g−1 after 3000 cycles for KIBs, with a capacity retention ratio of 71%. To investigate the electrochemical enhancement performance of our N-CNF, we provide the calculation results according to density functional theory, demonstrating that nitrogen doping in carbon is in favor of the K-ion adsorption during the potassiation process. This behavior will contribute to the enhancement of electrochemical performance for KIBs. In addition, our electrode exhibits a low voltage plateau during the potassiation–depotassiation process. To further evaluate this performance, we calculate the “relative energy density” for comparison. The results illustrate that our electrode presents a high “relative energy density”, indicating that our N-CNF is a promising anode material for KIBs.

A modified molecular framework derived highly efficient Mn–Co–carbon cathode for a flexible Zn–air battery

2017 ◽  
Vol 53 (84) ◽  
pp. 11596-11599 ◽  
Author(s):  
Hui Cheng ◽  
Jun-Min Chen ◽  
Qi-Jia Li ◽  
Chang-Yuan Su ◽  
An-Na Chen ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Bimetallic Nanoparticles ◽  
High Conductivity ◽  
Carbon Cathode ◽  
Nitrogen Doped ◽  
Highly Efficient ◽  
Air Battery ◽  
Nitrogen Doped Carbon ◽  
Molecular Framework

Advanced Co–Mn bimetallic nanoparticles are decorated on high conductivity nitrogen doped carbon nanotubes to serve as the efficient oxygen-catalyst.

Hybridizing germanium anodes with polysaccharide-derived nitrogen-doped carbon for high volumetric capacity of Li-ion batteries

2017 ◽  
Vol 5 (30) ◽  
pp. 15828-15837 ◽  
Author(s):  
Jaegeon Ryu ◽  
Dongki Hong ◽  
Sunghee Shin ◽  
Wooyoung Choi ◽  
Ahyoung Kim ◽  
...  
Keyword(s):  
Energy Density ◽  
Lithium Ion Batteries ◽  
Lithium Ion ◽  
Li Ion Batteries ◽  
Nitrogen Doped ◽  
Volumetric Capacity ◽  
Li Ion ◽  
Nitrogen Doped Carbon

Hybridized Ge nanostructures with nitrogen-doped carbon have been demonstrated for high volumetric energy density of lithium ion batteries.

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