Carbon-coated single-crystalline LiFePO4 nanocomposites for high-power Li-ion batteries: the impact of minimization of the precursor particle size

RSC Advances ◽  
2014 ◽  
Vol 4 (20) ◽  
pp. 10067 ◽  
Author(s):  
Tiefeng Liu ◽  
Li Zhao ◽  
Dianlong Wang ◽  
Junsheng Zhu ◽  
Bo Wang ◽  
...  
Keyword(s):  
Particle Size ◽  
High Power ◽  
Li Ion Batteries ◽  
Single Crystalline ◽  
Precursor Particle ◽  
Carbon Coated ◽  
Li Ion ◽  
The Impact

Carbon-Coated Li3Nd3W2O12: A High Power and Low-Voltage Insertion Anode with Exceptional Cycleability for Li-Ion Batteries

2014 ◽  
Vol 4 (9) ◽  
pp. 1301715 ◽  
Author(s):  
Rohit Satish ◽  
Vanchiappan Aravindan ◽  
Wong Chui Ling ◽  
John B. Goodenough ◽  
Srinivasan Madhavi
Keyword(s):  
High Power ◽  
Low Voltage ◽  
Li Ion Batteries ◽  
Carbon Coated ◽  
Li Ion

High Performance of Lithium Iron Phosphates for HEV with Quality Control Made by Magnetometry

2006 ◽  
Vol 973 ◽  
Author(s):  
Christian M Julien ◽  
Alain Mauger ◽  
Karim Zaghib ◽  
François Gendron
Keyword(s):  
High Performance ◽  
Magnetic Measurements ◽  
Li Ion Batteries ◽  
Squid Magnetometry ◽  
Iron Dissolution ◽  
Fundamental Properties ◽  
Nanoscopic Structure ◽  
Carbon Coated ◽  
Li Ion ◽  
The Impact

ABSTRACTOptimized LiFePO4 positive electrode for Li-ion batteries was obtained after severe control of the fundamental properties of material. The nanoscopic structure and magnetic properties of a series of carbon-coated LiFePO4 particles prepared under various conditions were analyzed with XRD, FTIR, Raman and SQUID magnetometry. We evaluate intrinsic and extrinsic properties. The existence of low content of nano-sized ferromagnetic particles was evidenced by magnetic measurements in samples grown from iron(II) oxalate; such ferromagnetic clusters do not exist in the optimised samples grown from FePO4(H2O)2. Other impurity phases such as Fe2P, Li3Fe2(PO4)3, FeP2O7 were also detected for particular conditions of preparation. The impact of the carbon coating on the electrochemical properties is reported. Li-ion cells show excellent cyclability after 200 cycles at 60 °C without iron dissolution.

Enhanced thermal safety and high power performance of carbon-coated LiFePO4 olivine cathode for Li-ion batteries

2012 ◽  
Vol 219 ◽  
pp. 36-44 ◽  
Author(s):  
K. Zaghib ◽  
J. Dubé ◽  
A. Dallaire ◽  
K. Galoustov ◽  
A. Guerfi ◽  
...  
Keyword(s):  
High Power ◽  
Li Ion Batteries ◽  
Thermal Safety ◽  
Power Performance ◽  
Carbon Coated ◽  
Li Ion

Construction of Carbon-Coated [email protected] Nanorod Composites for High-Performance Li-Ion Batteries

2021 ◽  
Author(s):  
Hui Chang ◽  
Ying Li ◽  
Zi-Kui Fang ◽  
Jin-Peng Qu ◽  
Yan-Rong Zhu ◽  
...  
Keyword(s):  
High Performance ◽  
Li Ion Batteries ◽  
Carbon Coated ◽  
Li Ion

scholarly journals High power nano-structured V2O5 thin film cathodes by atomic layer deposition

2014 ◽  
Vol 2 (36) ◽  
pp. 15044-15051 ◽  
Author(s):  
Erik Østreng ◽  
Knut Bjarne Gandrud ◽  
Yang Hu ◽  
Ola Nilsen ◽  
Helmer Fjellvåg
Keyword(s):  
Thin Film ◽  
Atomic Layer Deposition ◽  
High Power ◽  
Atomic Layer ◽  
Li Ion Batteries ◽  
Layer Deposition ◽  
Li Ion

Atomic layer deposition (ALD) has been used to prepare nano-structured cathode films for Li-ion batteries of V2O5 from VO(thd)2 and ozone at 215 °C.

Probing the Effect of High Energy Ball Milling on the Structure and Properties of LiNi1/3Mn1/3Co1/3O2 Cathodes for Li-Ion Batteries

2016 ◽  
Vol 13 (3) ◽  
Author(s):  
Malcolm Stein ◽  
Chien-Fan Chen ◽  
Matthew Mullings ◽  
David Jaime ◽  
Audrey Zaleski ◽  
...  
Keyword(s):  
Particle Size ◽  
Electrochemical Performance ◽  
Crystallite Size ◽  
Ball Milling ◽  
Lithium Ion ◽  
High Energy ◽  
Li Ion Batteries ◽  
Structure And Properties ◽  
Transfer Resistance ◽  
Li Ion

Particle size plays an important role in the electrochemical performance of cathodes for lithium-ion (Li-ion) batteries. High energy planetary ball milling of LiNi1/3Mn1/3Co1/3O2 (NMC) cathode materials was investigated as a route to reduce the particle size and improve the electrochemical performance. The effect of ball milling times, milling speeds, and composition on the structure and properties of NMC cathodes was determined. X-ray diffraction analysis showed that ball milling decreased primary particle (crystallite) size by up to 29%, and the crystallite size was correlated with the milling time and milling speed. Using relatively mild milling conditions that provided an intermediate crystallite size, cathodes with higher capacities, improved rate capabilities, and improved capacity retention were obtained within 14 μm-thick electrode configurations. High milling speeds and long milling times not only resulted in smaller crystallite sizes but also lowered electrochemical performance. Beyond reduction in crystallite size, ball milling was found to increase the interfacial charge transfer resistance, lower the electrical conductivity, and produce aggregates that influenced performance. Computations support that electrolyte diffusivity within the cathode and film thickness play a significant role in the electrode performance. This study shows that cathodes with improved performance are obtained through use of mild ball milling conditions and appropriately designed electrodes that optimize the multiple transport phenomena involved in electrochemical charge storage materials.

scholarly journals Carbon-Coated SiO2 Composites as Promising Anode Material for Li-Ion Batteries

Molecules ◽  
2021 ◽  
Vol 26 (15) ◽  
pp. 4531
Author(s):  
Mihaela-Ramona Buga ◽  
Adnana Alina Spinu-Zaulet ◽  
Cosmin Giorgian Ungureanu ◽  
Raul-Augustin Mitran ◽  
Eugeniu Vasile ◽  
...  
Keyword(s):  
Anode Material ◽  
Photoelectron Spectroscopy ◽  
Coulombic Efficiency ◽  
Cycling Stability ◽  
Li Ion Batteries ◽  
Transfer Resistance ◽  
Promising Alternative ◽  
X Ray ◽  
Carbon Coated ◽  
Li Ion

Porous silica-based materials are a promising alternative to graphite anodes for Li-ion batteries due to their high theoretical capacity, low discharge potential similar to pure silicon, superior cycling stability compared to silicon, abundance, and environmental friendliness. However, several challenges prevent the practical application of silica anodes, such as low coulombic efficiency and irreversible capacity losses during cycling. The main strategy to tackle the challenges of silica as an anode material has been developed to prepare carbon-coated SiO2 composites by carbonization in argon atmosphere. A facile and eco-friendly method of preparing carbon-coated SiO2 composites using sucrose is reported herein. The carbon-coated SiO2 composites were characterized using X-ray diffraction, X-ray photoelectron spectroscopy, thermogravimetry, transmission and scanning electron microscopy coupled with energy-dispersive X-ray spectroscopy, cyclic voltammetry, and charge–discharge cycling. A C/SiO2-0.085 M calendered electrode displays the best cycling stability, capacity of 714.3 mAh·g−1, and coulombic efficiency as well as the lowest charge transfer resistance over 200 cycles without electrode degradation. The electrochemical performance improvement could be attributed to the positive effect of the carbon thin layer that can effectively diminish interfacial impedance.

Carbon-coated graphene–Cr2O3 composites with enhanced electrochemical performances for Li-ion batteries

Carbon ◽  
2013 ◽  
Vol 65 ◽  
pp. 97-104 ◽  
Author(s):  
Wenbo Yue ◽  
Shanshan Tao ◽  
Jianmei Fu ◽  
Ziqi Gao ◽  
Yu Ren
Keyword(s):  
Electrochemical Performances ◽  
Li Ion Batteries ◽  
Carbon Coated ◽  
Li Ion
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