SYNTHESIS AND PROPERTIES OF Li2MnSiO4 COMPOSITE CATHODE MATERIAL FOR SAFE Li-ION BATTERIES

2011 ◽  
Vol 04 (02) ◽  
pp. 135-138 ◽  
Author(s):  
MARCIN MOLENDA ◽  
MICHAŁ ŚWIȨTOSŁAWSKI ◽  
ALICJA RAFALSKA-ŁASOCHA ◽  
ROMAN DZIEMBAJ
Keyword(s):  
Cathode Material ◽  
Pechini Method ◽  
Sol Gel ◽  
Composite Cathode ◽  
Carbon Layer ◽  
Li Ion Batteries ◽  
Covalent Bonds ◽  
Organic Precursor ◽  
Synthesis Conditions ◽  
Li Ion

Lithium silicates Li 2 MnSiO 4 (where M is a 3d metal) with their theoretical capacity up to 333 mAh⋅g-1 and high chemical stability, thanks to a presence of strong covalent bonds Si – O , seem to be a good potential cathode material for Li -ion batteries. The main drawback of those materials is their low electric conductivity which can be enhanced by coating the material with conductive carbon layer (CCL). This work concerns the synthesis of CCL / Li 2 MnSiO 4 composite material and investigation of its physicochemical properties. The material was successfully produced using sol-gel Pechini method. In order to find the best way of receiving Li 2 MnSiO 4 product various synthesis conditions were applied. CCL / Li 2 MnSiO 4 composite was produced in a one-step process using organic precursor matrix as a source of carbon. Both Li 2 MnSiO 4 material and CCL/ Li 2 MnSiO 4 composite were investigated using thermal analysis (EGA-TGA/DTG/SDTA), X-ray diffraction (XRD) and electrical conductivity measurements to find the relations between structure, morphology and electrochemical properties.

Novel synthesis of LiCoPO4–Li3V2(PO4)3 composite cathode material for Li-ion batteries

2015 ◽  
Vol 152 ◽  
pp. 228-231 ◽  
Author(s):  
Ling Wu ◽  
Shaonan Shi ◽  
Xiaoping Zhang ◽  
Jiequn Liu ◽  
Dong Chen ◽  
...  
Keyword(s):  
Cathode Material ◽  
Composite Cathode ◽  
Li Ion Batteries ◽  
Novel Synthesis ◽  
Composite Cathode Material ◽  
Li Ion

scholarly journals Reduced Sintering Temperatures of Li+ Conductive Li1.3Al0.3Ti1.7(PO4)3 Ceramics

Crystals ◽  
2020 ◽  
Vol 10 (5) ◽  
pp. 408
Author(s):  
Katja Waetzig ◽  
Christian Heubner ◽  
Mihails Kusnezoff
Keyword(s):  
Solid State ◽  
Ionic Conductivity ◽  
Cathode Material ◽  
Solid Electrolyte ◽  
Composite Cathode ◽  
Li Ion Batteries ◽  
Promising Candidate ◽  
Composite Cathodes ◽  
Solid State Batteries ◽  
Li Ion

All-solid-state batteries (ASSB) are considered promising candidates for future energy storage and advanced electric mobility. When compared to conventional Li-ion batteries, the substitution of Li-ion conductive, flammable liquids by a solid electrolyte and the application of Li-metal anodes substantially increase safety and energy density. The solid electrolyte Li1.3Al0.3Ti1.7(PO4)3 (LATP) provides high Li-ion conductivity of about 10−3 S/cm and is considered a highly promising candidate for both the solid electrolyte-separator and the ionically conductive part of the all-solid state composite cathode, consisting of the cathode material, the solid electrolyte, and an electron conductor. Co-sintering of the composite cathode is a sophisticated challenge, because temperatures above 1000 °C are typically required to achieve the maximum ionic conductivity of LATP but provoke reactions with the cathode material, inhibiting proper electrochemical functioning in the ASSB. In the present study, the application of sintering aids with different melting points and their impact on the sinterability and the conductivity of LATP were investigated by means of optical dilatometry and impedance spectroscopy. The microstructure of the samples was analyzed by SEM. The results indicate that the sintering temperature can be reduced below 800 °C while maintaining high ionic conductivity of up to 3.6 × 10−4 S/cm. These insights can be considered a crucial step forward towards enable LATP-based composite cathodes for future ASSB.

Stability of C/Li2MnSiO4 composite cathode material for Li-ion batteries towards LiPF6 based electrolyte

2014 ◽  
Vol 262 ◽  
pp. 98-101 ◽  
Author(s):  
M. Molenda ◽  
M. Świętosławski ◽  
A. Wach ◽  
D. Majda ◽  
P. Kuśtrowski ◽  
...  
Keyword(s):  
Cathode Material ◽  
Composite Cathode ◽  
Li Ion Batteries ◽  
Composite Cathode Material ◽  
Li Ion

Low-Temperature Performance of the Li[Li0.2Co0.4Mn0.4]O2 Cathode Material Studied for Li-Ion Batteries

2011 ◽  
Vol 347-353 ◽  
pp. 3662-3665 ◽  
Author(s):  
Yu Hui Wang ◽  
Zhe Li ◽  
Kai Zhu ◽  
Gang Li ◽  
Ying Jin Wei ◽  
...  
Keyword(s):  
Low Temperature ◽  
Cathode Material ◽  
Room Temperature ◽  
Sol Gel ◽  
Cycle Performance ◽  
Li Ion Batteries ◽  
X Ray Diffraction ◽  
Capacity Retention ◽  
X Ray ◽  
Li Ion

The Li[Li0.2Co0.4Mn0.4]O2 cathode material was prepared by a sol-gel method. Combinative X-ray diffraction (XRD) studies showed that the material was a solid solution of LiCoO2 and Li2MnO3. The material showed a reversible discharge capacity of 155.0 mAhg−1 at -20 °C, which is smaller than that at room temperature (245.5 mAhg−1). However, the sample exhibited capacity retention of 96.3 % at -20 °C, only 74.2 % at 25 °C. The good electrochemical cycle performance at low temperature was due to the inexistence of Mn3+ in the material.

scholarly journals An overview of bio-interface electrolyte and Li2FePO4F as cathode in Li-ion batteries

2019 ◽  
Vol 9 (2) ◽  
pp. 3866-3873
Keyword(s):  
Cathode Material ◽  
Lithium Ion Batteries ◽  
Cathode Materials ◽  
Sol Gel ◽  
Lithium Ion ◽  
Li Ion Batteries ◽  
View Point ◽  
Iron Nickel ◽  
Li Ion ◽  
Charge Discharge

Composites of {[(1-x-y) LiFe0.333Ni0.333 Co0.333] PO4}, xLi2FePO4F and yLiCoPO4system were synthesized using the sol-gel method. Stoichiometric weights of the mole-fraction of LiOH, FeCl2·4H2O and H3PO4, LiCl, Ni(NO3)2⋅6H2O, Co(Ac)2⋅4H2O, as starting materials of lithium, Iron, Nickel , and Cobalt, in 7 samples of the system, respectively. We exhibited Li1.167 Ni0.222 Co0.389 Fe0.388 PO4 is the best composition for cathode material in this study. Obviously, the used weight of cobalt in these samples is lower compared with LiCoO2 that is an advantage in view point of cost in this study. Charge-discharge haracteristics of the mentioned cathode materials were investigated by performing cycle tests in the range of 2.4–3.8 V (versus Li/Li+). Our results confirmed, although these kind systems can help for removing the disadvantage of cobalt which mainly is its cost and toxic, the performance of these kind systems are similar to the commercial cathode materials in Lithium Ion batteries (LIBs).

Sign in / Sign up

Export Citation Format

Share Document