Y1-xDyxSn2-yMy
(M = Sb, Pb) electrode materials activated by CNT and Mg–T–Ga (T
= Co, Ni) phases for lithium- and sodium-ion batteries
Chem.
Met. Alloys 13 (2020)
70-77
https://doi.org/10.30970/cma13.0408
Volodymyr PAVLYUK, Wojciech CIESIELSKI, Nazar PAVLYUK,
Hryhoriy DMYTRIV, Damian KULAWIK, Agnieszka BALIŃSKA, Karolina KLUZIAK
The new quaternary Y1-xDyxSn2-yMy
(M = Sb, Pb) phases crystallize as maximally
disordered (MD) representatives with the orthorhombic structure type ZrSi2.
During electrochemical lithiation and sodiation,
the formation of Y1-xDyxSn2-yMyLiz
and Y1-xDyxSn2-yMyNaz
maximally disordered – high-entropy intermetallic phases (MD-HEIP), as the
result of insertion of Li/Na into structural voids, was observed. Carbon
nanotubes (CNT) and Mg–T–Ga (T = Co, Ni) phases are efficient
catalytic additives to improve the cycling stability of the anodes for lithium-ion
(LIBs) and sodium-ion batteries (SIBs). The results show that the catalysts can
increase the electrode capacities up to 15 % for LIBs and up to 10 %
for SIBs.
Electrochemical impedance spectra (EIS) of the electrodes
for Li-ion cells (a) and Na-ion cells (b).
Keywords
Intermetallic compound / Crystal structure /
Lithium-ion battery/ Sodium-ion battery