Title of article :
Searching for new anode materials for the Li-ion technology: time to deviate from the usual path
Author/Authors :
P. Poizot، نويسنده , , S. Laruelle، نويسنده , , S. Grugeon، نويسنده , , L. Dupont، نويسنده , , J-M. Tarascon، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2001
Pages :
5
From page :
235
To page :
239
Abstract :
A brief review of our fundamental studies of the reversible reactivity mechanism of vanadates towards lithium is presented. This mechanism totally differs from the classical one based either on reversible insertion/deinsertion of lithium into host structures or on Li alloying reactions, and has led to the thought of using nanosized transition metal oxides as possible negative electrode materials for rechargeable Li-ion batteries. Electrochemical capacities, as high as 700 mAh/g with a 100% capacity retention up to 100 cycles and high rates, can be achieved with optimized metal oxides (MO, M=Co, Cu, Ni, Fe, etc.) powders. By combining transmission electron microscope (TEM), infrared (IR) and magnetic measurements we directly proved the formation of 10–50 Å metal nanoparticles dispersed into a lithia (Li2O) matrix during the reduction step of MO with Li. Upon oxidation, the metal nanoparticles were shown to convert back to MO while Li2O was decomposed. The new opportunities provided by these metal oxides systems based on the reversible formation/decomposition of Li2O are discussed together with the positive attributes that nanoparticles could have to the field of energy storage.
Keywords :
Li-ion technology , Li2O , Nanometric 3d oxides
Journal title :
Journal of Power Sources
Serial Year :
2001
Journal title :
Journal of Power Sources
Record number :
440575
Link To Document :
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