Encapsulation of NiCo2O4 in nitrogen-doped reduced graphene oxide for sodium ion capacitors

2018 ◽  
Vol 6 (29) ◽  
pp. 14146-14154 ◽  
Author(s):  
Dongfang Yang ◽  
Qinglan Zhao ◽  
Liqing Huang ◽  
Binghui Xu ◽  
Nanjundan Ashok Kumar ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Electronic Conductivity ◽  
Sodium Ion ◽  
Volume Changes ◽  
Nitrogen Doped ◽  
Reduced Graphene ◽  
Charge Discharge

The graphene framework guarantees good electronic conductivity and provides space for accommodating the volume changes of NiCo2O4 particles during charge/discharge.

scholarly journals Facile Synthesis of Sn/Nitrogen-Doped Reduced Graphene Oxide Nanocomposites with Superb Lithium Storage Properties

Nanomaterials ◽  
2019 ◽  
Vol 9 (8) ◽  
pp. 1084 ◽  
Author(s):  
Quan Sun ◽  
Ying Huang ◽  
Shi Wu ◽  
Zhonghui Gao ◽  
Hang Liu ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Active Sites ◽  
Electronic Conductivity ◽  
Rate Capability ◽  
Lithium Ion ◽  
Discharge Process ◽  
Lithium Storage ◽  
Nitrogen Doped ◽  
Reduced Graphene

Sn/Nitrogen-doped reduced graphene oxide (Sn@N-G) composites have been successfully synthesized via a facile method for lithium-ion batteries. Compared with the Sn or Sn/graphene anodes, the Sn@N-G anode exhibits a superb rate capability of 535 mAh g−1 at 2C and cycling stability up to 300 cycles at 0.5C. The improved lithium-storage performance of Sn@N-G anode could be ascribed to the effective graphene wrapping, which accommodates the large volume change of Sn during the charge–discharge process, while the nitrogen doping increases the electronic conductivity of graphene, as well as provides a large number of active sites as reservoirs for Li+ storage.

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