TY - JOUR
T1 - Design of Li1+2:XZn1-xPS4, a new lithium ion conductor
AU - Richards, William D.
AU - Wang, Yan
AU - Miara, Lincoln J.
AU - Kim, Jae Chul
AU - Ceder, Gerbrand
N1 - Publisher Copyright:
© 2016 The Royal Society of Chemistry.
PY - 2016/10
Y1 - 2016/10
N2 - Recent theoretical work has uncovered that a body-centered-cubic (bcc) anion arrangement leads to high ionic conductivity in a number of fast lithium-ion conducting materials. Using this structural feature as a screening criterion, we find that the I4 material LiZnPS4 contains such a framework and has the potential for very high ionic conductivity. In this work, we apply ab initio computational techniques to investigate in detail the ionic conductivity and defect properties of this material. We find that while the stoichiometric structure has poor ionic conductivity, engineering of its composition to introduce interstitial lithium defects is able to exploit the low migration barrier of the bcc anion framework. Our calculations predict a solid-solution regime extending to x = 0.5 in Li1+2xZn1-xPS4, and yield a new ionic conductor with exceptionally high lithium-ion conductivity, potentially exceeding 50 mS cm-1 at room temperature.
AB - Recent theoretical work has uncovered that a body-centered-cubic (bcc) anion arrangement leads to high ionic conductivity in a number of fast lithium-ion conducting materials. Using this structural feature as a screening criterion, we find that the I4 material LiZnPS4 contains such a framework and has the potential for very high ionic conductivity. In this work, we apply ab initio computational techniques to investigate in detail the ionic conductivity and defect properties of this material. We find that while the stoichiometric structure has poor ionic conductivity, engineering of its composition to introduce interstitial lithium defects is able to exploit the low migration barrier of the bcc anion framework. Our calculations predict a solid-solution regime extending to x = 0.5 in Li1+2xZn1-xPS4, and yield a new ionic conductor with exceptionally high lithium-ion conductivity, potentially exceeding 50 mS cm-1 at room temperature.
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U2 - 10.1039/c6ee02094a
DO - 10.1039/c6ee02094a
M3 - Article
AN - SCOPUS:84990935128
SN - 1754-5692
VL - 9
SP - 3272
EP - 3278
JO - Energy and Environmental Science
JF - Energy and Environmental Science
IS - 10
ER -