scholarly journals Synthesis, Characterization and Electrochemical Properties of α-MnO2 Nanowires as Electrode Material for Supercapacitors

2018 ◽  
pp. 6426-6435 ◽  
Author(s):  
Hidayat Ullah Shah ◽  
Keyword(s):  
Electrochemical Properties ◽  
Electrode Material ◽  
Mno2 Nanowires

Preparation and Electrochemical Properties of LaMnO3 Powder as a Supercapacitor Electrode Material

2017 ◽  
Vol 727 ◽  
pp. 698-704 ◽  
Author(s):  
Xian Wei Wang ◽  
Xiao Er Wang ◽  
Hui Chao Zhang ◽  
Qian Qian Zhu ◽  
Dong Li Zheng ◽  
...  
Keyword(s):  
Cyclic Voltammetry ◽  
Electrochemical Properties ◽  
Electrode Material ◽  
Raw Materials ◽  
Sol Gel ◽  
Galvanostatic Charge ◽  
Supercapacitor Electrode ◽  
Lanthanum Manganate ◽  
Pure Phase ◽  
Charge Discharge

The structural and electrochemical properties of lanthanum manganate (LaMnO3) powder prepared by the sol-gel method are researched in this article. The powder calcined at 600 °C showed amorphous, and the powder calcined at 700-800 °C showed the pure phase of the LaMnO3. The grains with the size of about 80-120 nm were agglomerating together. Cyclic voltammetry and galvanostatic charge-discharge were used to characterize the electrochemical properties in alkaline environment. The electrochemical properties calcined at 700 °C showed a specific capacitance of 73 F/g at the current density of 0.5 A/g. The raw materials for preparing the LaMnO3 powder are cheap, and the operation method is simple.

scholarly journals Diatoms Biomass as a Joint Source of Biosilica and Carbon for Lithium-Ion Battery Anodes

Materials ◽  
2020 ◽  
Vol 13 (7) ◽  
pp. 1673 ◽  
Author(s):  
Andrzej P. Nowak ◽  
Myroslav Sprynskyy ◽  
Izabela Wojtczak ◽  
Konrad Trzciński ◽  
Joanna Wysocka ◽  
...  
Keyword(s):  
Electrochemical Properties ◽  
Electrode Material ◽  
Pyrolysis Temperature ◽  
Lithium Ion ◽  
Potential Range ◽  
Solid State Physics ◽  
Electroactive Material ◽  
A Value ◽  
Thermally Processed ◽  
Specific Discharge

The biomass of one type cultivated diatoms (Pseudostaurosira trainorii), being a source of 3D-stuctured biosilica and organic matter—the source of carbon, was thermally processed to become an electroactive material in a potential range adequate to become an anode in lithium ion batteries. Carbonized material was characterized by means of selected solid-state physics techniques (XRD, Raman, TGA). It was shown that the pyrolysis temperature (600 °C, 800 °C, 1000 °C) affected structural and electrochemical properties of the electrode material. Biomass carbonized at 600 °C exhibited the best electrochemical properties reaching a specific discharge capacity of 460 mAh g−1 for the 70th cycle. Such a value indicates the possibility of usage of biosilica as an electrode material in energy storage applications.

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