Synthesis, Optical and Electrochemical Properties of Y2O3 Nanoparticles Prepared by Co-Precipitation Method

2015 ◽  
Vol 15 (6) ◽  
pp. 4353-4357 ◽  
Author(s):  
Thulasingam Saravanan ◽  
Srinivasan Gokul Raj ◽  
Nagamuthu Raja Krishna Chandar ◽  
Ramasamy Jayavel
Keyword(s):  
Electrochemical Properties ◽  
Precipitation Method ◽  
Co Precipitation

Synthesis and Electrochemical Properties of 0.5Li2MnO3•0.5LiMn0.5Ni0.5O2

2010 ◽  
Vol 105-106 ◽  
pp. 664-667
Author(s):  
Sheng Wen Zhong ◽  
Wei Hu ◽  
Qian Zhang
Keyword(s):  
Cathode Material ◽  
Electrochemical Properties ◽  
Specific Capacity ◽  
Precipitation Method ◽  
Electrochemical Performances ◽  
Discharge Specific Capacity ◽  
Xrd Patterns ◽  
Co Precipitation ◽  
Two Stages ◽  
Calcined Temperature

The precursor of Mn0.75Ni0.25CO3 is prepared by carbonate co-precipitation method. And the cathode material 0.5Li2MnO3•0.5LiMn0.5Ni0.5O2 is synthesized with two stages calcining temperatures T1 and T2. T1 represents 400°C, 500°C, 600°C and T2 is selected at 750°C, 850°C, 950°C respectively. XRD Patterns shows that the cathode material has the integrated structures of Li2MnO3 and LiMO2, and it has better crystallization during the rise of calcined temperature at 950°C. The electrochemical performances tests indicates that the initial discharge specific capacity are greater than 220mAh/g at the current density 0.2 mA/cm2 in 2.5-4.6V at room temperature. When cathode material is calcined at 750°C, its discharge specific capacity even reach to 248mAh/g, but the cathode material has more perfect general electrochemical properties during calcined temperature at 950°C.

The fine control of porous pompon-like Mg-incorporated α-Ni(OH)2 for enhanced supercapacities

2016 ◽  
Vol 09 (05) ◽  
pp. 1650057 ◽  
Author(s):  
Shuxia Yuan ◽  
Xiaomin Wang ◽  
Chunxiang Lu ◽  
Cheng-Meng Chen
Keyword(s):  
Electrochemical Properties ◽  
Chemical Stability ◽  
Rate Capability ◽  
High Specific Capacitance ◽  
Precipitation Method ◽  
Long Cycle Life ◽  
Fine Control ◽  
Desorption Isotherms ◽  
Co Precipitation ◽  
Adsorption Desorption

Uniform porous pompon-like Mg-incorporated [Formula: see text]-Ni(OH)2 were designed and synthesized by a facile co-precipitation method. The results of ICP, XRD, FESEM, EDS and N2 adsorption/desorption isotherms revealed that Mg[Formula: see text] in the Ni(OH)2 lattice had a significant effect on the physicochemical and electrochemical properties. The enhanced chemical stability, high specific capacitance of 1647 F g[Formula: see text], excellent rate capability and long cycle life with capacitance retention of 82.0% after 1000 cycles were obtained for Mg-incorporated samples.

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