TY - JOUR
T1 - Electrochemical intercalation of lithium in layered niobates AB2Nb3O10 (A = K, Rb, Cs; B = Ca, Sr) and their superconductivity
AU - Nagai, I.
AU - Abe, Y.
AU - Kato, M.
AU - Koike, Y.
AU - Kakihana, M.
N1 - Funding Information:
Financial support by the “Research for the Future” Program, no. JSPS-RFTF96-R06901, from the Japan Society for the Promotion of Science is gratefully acknowledged (Research Coordinator: Professor M. Yoshimura of the Tokyo Institute of Technology).
PY - 2001/8
Y1 - 2001/8
N2 - We have succeeded in preparing Li-intercalated layered niobium oxide LixAB2Nb3O10 (A = K, Rb, Cs; B = Ca, Sr) by an electrochemical technique. The host compounds AB2Nb3O10 were synthesized by a solid state reaction method at 850-1150°C for 10-12 h. All of the intercalated compounds showed superconductivity at 4-6 K. In the cases of A = Rb, B = Ca, and A = Cs, B = Ca, no superconductivity appeared up to x = 0.17; for x = 0.34 and 0.46 Tc was constant with maximum value, and for x = 0.62 Tc decreased slightly. On the other hand, the correlation between Tc (onset) and a-axis length demonstrates that Tc tends to increase with a-axis length increasing, which was found in Li0.34 AB2Nb3O10 with optimum Li content.
AB - We have succeeded in preparing Li-intercalated layered niobium oxide LixAB2Nb3O10 (A = K, Rb, Cs; B = Ca, Sr) by an electrochemical technique. The host compounds AB2Nb3O10 were synthesized by a solid state reaction method at 850-1150°C for 10-12 h. All of the intercalated compounds showed superconductivity at 4-6 K. In the cases of A = Rb, B = Ca, and A = Cs, B = Ca, no superconductivity appeared up to x = 0.17; for x = 0.34 and 0.46 Tc was constant with maximum value, and for x = 0.62 Tc decreased slightly. On the other hand, the correlation between Tc (onset) and a-axis length demonstrates that Tc tends to increase with a-axis length increasing, which was found in Li0.34 AB2Nb3O10 with optimum Li content.
KW - Electrochemical intercalation
KW - Layered niobate
KW - Li content
KW - a-axis length
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U2 - 10.1016/S0921-4534(01)00260-X
DO - 10.1016/S0921-4534(01)00260-X
M3 - Article
AN - SCOPUS:0035421792
VL - 357-360
SP - 393
EP - 396
JO - Physica C: Superconductivity and its Applications
JF - Physica C: Superconductivity and its Applications
SN - 0921-4534
ER -