Role of carbon coating in improving electrochemical performance of Li-rich Li(Li0.2Mn0.54Ni0.13Co0.13)O2 cathode

RSC Advances ◽  
2014 ◽  
Vol 4 (83) ◽  
pp. 44244-44252 ◽  
Author(s):  
Bohang Song ◽  
Cuifeng Zhou ◽  
Yu Chen ◽  
Zongwen Liu ◽  
Man On Lai ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
Carbon Coating ◽  
Carbon Layer ◽  
Hydrothermal Approach

Li-rich Li(Li0.2Mn0.54Ni0.13Co0.13)O2 cathode coated with carbon layer has been prepared by a hydrothermal approach. The enhanced performance is attributed to the carbon layer and surface spinels on particles.

Role of the Mn substituent in Na3V2(PO4)3 for high-rate sodium storage

2018 ◽  
Vol 6 (34) ◽  
pp. 16627-16637 ◽  
Author(s):  
Jae-Sang Park ◽  
Jongsoon Kim ◽  
Jae Hyeon Jo ◽  
Seung-Taek Myung
Keyword(s):  
Electron Transfer ◽  
Electrochemical Performance ◽  
Band Gap ◽  
Electric Conductivity ◽  
Carbon Coating ◽  
Band Gap Energy ◽  
High Rate ◽  
Gap Energy ◽  
Sodium Storage

C/NVMP allowed high electrochemical performance supported by the replace V by the Mn promoted the easier electron transfer through lower band gap energy than Mn-free NVP and carbon coating increase the electric conductivity up to 2 × 10−3 s cm−1, which led to superior electrode performance.

scholarly journals Optimizing carbon coating parameters for obtaining SiO2/C anodes with improved electrochemical performance

2021 ◽  
Author(s):  
Maria Valeria Blanco ◽  
Viktor Renman ◽  
Jiefang Zhu ◽  
Fride Vullum-Bruer ◽  
Ann Mari Svensson
Keyword(s):  
Electrochemical Performance ◽  
Carbon Coating ◽  
Annealing Temperature ◽  
Low Cost ◽  
Specific Capacity ◽  
Reversible Capacity ◽  
Carbon Layer ◽  
Complete Coverage ◽  
Positive Effects ◽  
Heat Treated

AbstractIn this work, we present a comprehensive and systematic study on the use of low-cost and highly abundant carbon precursors to obtain SiO2/C anodes with superior electrochemical performance towards Li-ions. Different SiO2/C composites are prepared by soaking silica nanoparticles in solutions containing 20 wt%, 40 wt%, or 60 wt% of glucose, sucrose, or cornstarch, followed by thermal decomposition of the carbohydrates at 850 °C or 1200 °C. Structural, microstructural, and textural differences on the composites derived from the different carbon coating treatments are related to the electrochemical performance of the anodes. Composites containing final carbon contents close to 15 wt% show a complete coverage of the SiO2 particles with a nanometric carbon layer and exhibit the best electrochemical results. The increase in the annealing temperature from 850 to 1200 °C reduces the porosity of the carbon layer and increases its level of ordering, both having positive effects on the overall electrochemical performance of the electrodes. SiO2/C composites coated with 40 wt% sucrose and heat treated at 1200 °C display the best electrochemical performance, delivering a reversible specific capacity of 723 mAhg−1 at 50 mAg−1 after 100 cycles, which is considerably higher than the reversible capacity of 233 mAhg−1 obtained with the uncoated material cycled under the same conditions.

Crucial role of water content on the electrochemical performance of α-Ni(OH)2 as an anode material for lithium-ion batteries

Ionics ◽  
2020 ◽  
Vol 27 (1) ◽  
pp. 65-74
Author(s):  
Jinhuan Yao ◽  
Yanwei Li ◽  
Renshu Huang ◽  
Jiqiong Jiang ◽  
Shunhua Xiao ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
Lithium Ion Batteries ◽  
Water Content ◽  
Anode Material ◽  
Crucial Role ◽  
Lithium Ion

Morphology and Structure Induced Co3O4 Nanowires High-Performance Supercapacitor Electrode Material

2021 ◽  
Vol 16 (6) ◽  
pp. 1005-1010
Author(s):  
Jian Wang ◽  
Yan Zhao ◽  
Yucai Li ◽  
Shiwei Song
Keyword(s):  
Electrochemical Performance ◽  
High Performance ◽  
Structural Characteristics ◽  
High Porosity ◽  
Ni Foam ◽  
Supercapacitor Electrode ◽  
Morphology And Structure ◽  
Hydrothermal Approach ◽  
Large Capacitance ◽  
Superior Cycling Stability

The electrochemical performance of the material depends heavily on the morphologies and structural characteristics of the material. Co3O4 samples show the remarkable electrochemical performance owing to the high porosity, appropriate pore size distribution and novel architecture and the effect of NH4F for morphology. Co3O4 nanowires grown on Ni foam have been synthesized through a facile hydrothermal approach, revealing large capacitance of 2178.4 mF cm−2 at the current density of 2 mA cm−2 and superior cycling stability.

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