Li6La3SnMO12 (M = Sb, Nb, Ta), a Family of Lithium Garnets with High Li-Ion Conductivity

Journal Article · Sat Dec 31 19:00:00 EST 2011 · Journal of the Electrochemical Society

OSTI ID:1049930

Bridges, Craig A ^[1]; Goodenough, J. B. ^[2]; Gupta, Dr Asha ^[2]; Nakanishi, Masahiro ^[1]; Paranthaman, Mariappan Parans ^[1]; Sokolov, Alexei P ^[1]; Bi, Zhonghe ^[1]; Li, Yutao ^[2]; Han, Jiantao ^[2]; Dong, Youzhong ^[3]; Wang, Long ^[2]; Xu, Maowen ^[2]

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1. ORNL
2. University of Texas, Austin
3. South China University of Technology, Guangzhou, PR China

In order to investigate the influence of covalent bonding within the garnet framework on the conductivity of Li+ in the interstitial space, the Li+ conductivities in the family of Sn-based compounds Li6La3 SnMO12 (M = Sb, Nb, Ta) have been obtained and are compared with those of Li6La3ZrMO12. Refinement of the neutron diffraction pattern of Li6La3 SnNbO12shows that the interstitial tetrahedral sites (24d ) are about half-occupied and most of the Li in the interstitial bridging octahedral sites are displaced from the center position (48g ). The Sb-based compound has the largest lattice parameter while the Ta-based compound has the highest Li+-ion conductivity of 0.42 10 4 Scm 1.

• Research Organization: Oak Ridge National Laboratory (ORNL)
• Sponsoring Organization: SC USDOE - Office of Science (SC)
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 1049930
• Journal Information: Journal of the Electrochemical Society, Journal Name: Journal of the Electrochemical Society Journal Issue: 8 Vol. 159; ISSN JESOAN; ISSN 0013-4651
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
BONDING
GARNETS
INTERSTITIALS
LATTICE PARAMETERS
LITHIUM
NEUTRON DIFFRACTION
lithium ion
neutron diffraction
solid electrolyte