Preparation of graphene hollow spheres from vacuum residue of ultra-heavy oil as an effective oxygen electrode for Li–O2 batteries

2018 ◽  
Vol 6 (9) ◽  
pp. 4040-4047 ◽  
Author(s):  
K. H. Lim ◽  
S. Kim ◽  
H. Kweon ◽  
S. Moon ◽  
C.-H. Lee ◽  
...  
Keyword(s):  
Energy Storage ◽  
Heavy Oil ◽  
Hollow Spheres ◽  
Oxygen Electrode ◽  
Vacuum Residue ◽  
Storage Material ◽  
Energy Storage Material

Low-valued vacuum residue was converted into 3D hollow graphene spheres as a promising energy storage material for Li–O2 batteries.

scholarly journals Solar Water Distillation Using Energy Storage Material

2015 ◽  
Vol 11 ◽  
pp. 368-375 ◽  
Author(s):  
M. Shashikanth ◽  
Binod Khadka ◽  
Yennam Lekhana ◽  
P. Mohan Sai Kiran ◽  
Nikhila Alaparthi ◽  
...  
Keyword(s):  
Energy Storage ◽  
Storage Material ◽  
Water Distillation ◽  
Solar Water ◽  
Energy Storage Material

scholarly journals Research of MnCO3/CB Composite on Properties Apply to Supercapacitors

2020 ◽  
Vol 185 ◽  
pp. 04023
Author(s):  
Liqiong Han ◽  
Yifan Liu ◽  
Rongyu Li
Keyword(s):  
Energy Storage ◽  
Electrode Material ◽  
Specific Capacity ◽  
Chemical Properties ◽  
Manganese Carbonate ◽  
Mixed Solution ◽  
Storage Material ◽  
New Energy ◽  
Energy Storage Material ◽  
Liquid Deposition

In order to improve the electro-conductibility of new energy storage material-manganese carbonate(MnCO3) and the properties apply to supercapacitors, we produce MnCO3/CB composite at room temperature by using a simple and mild liquid phase deposition method. Using dilute HNO3 to purify and activate the CB(carbon black), then put the handled CB into NH4HCO3/MnSO4 mixed solution for liquid deposition. Observed through infrared and XPS methods, we found that - after purified by dilute HNO3, the negatively charged groups(carboxyl & quinonyl) on CB surface increase, which makes CB uneasy to reunite in water and benefits the producing of a homogeneous compound. Observed the compound under SEM:40nm diameter CB granules wrap the Lotus-shaped MnCO3 granule, and form a porous structure between MnCO3 granules. The result of electro-chemical properties indicated by galvanostatic charge-discharge tests shows that the specific capacity of MnCO3/CB composite electrode material is twice of the pure MnCO3 electrode material, while the MnCO3/CB composite has a good cycle capacitive retention ratio. As a newly discovered energy storage material, MnCO3 provides a new direction to make composite material for supercapacitor electrodes.

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