TY - JOUR
T1 - Clean Solid-Electrolyte/Electrode Interfaces Double the Capacity of Solid-State Lithium Batteries
AU - Kawasoko, Hideyuki
AU - Shirasawa, Tetsuroh
AU - Nishio, Kazunori
AU - Shimizu, Ryota
AU - Shiraki, Susumu
AU - Hitosugi, Taro
N1 - Funding Information:
This research was supported by the World Premier International Research Center Initiative (WPI Initiative), the Toyota Corporation, and the “Applied and Practical LiB Development for Automobile and Multiple Application” project of the New Energy and Industrial Technology Development Organization (NEDO). We also acknowledge the support of Grants-in-Aid for Scientific Research (no. 18H03876), JST-ALCA, and JST-CREST. The synchrotron XRD experiments were performed at the Photon Factory, KEK, Japan (PF-PACS no. 2015S2-009). The authors thank Toru Suzuki and Kuniko Yamamoto for their experimental support. We thank Alan Burns, Ph.D., from the Edanz Group ( www.edanzediting.com/ac ) for editing the draft of this manuscript.
Publisher Copyright:
© 2021 American Chemical Society.
PY - 2021/2/3
Y1 - 2021/2/3
N2 - Solid-state lithium (Li) batteries using spinel-oxide electrode materials such as LiNi0.5Mn1.5O4 are promising power supplies for mobile devices and electric vehicles. Here, we demonstrate stable battery cycling between the Li0Ni0.5Mn1.5O4 and Li2Ni0.5Mn1.5O4 phases with working voltages of approximately 2.9 and 4.7 V versus Li/Li+ in solid-state Li batteries with contamination-free clean Li3PO4/LiNi0.5Mn1.5O4 interfaces. This clean interface has the effect of doubling the capacity of conventional battery cycling between the Li0Ni0.5Mn1.5O4 and Li1Ni0.5Mn1.5O4 phases. We also investigated the structural changes between the Li0Ni0.5Mn1.5O4 and Li2Ni0.5Mn1.5O4 phases during battery cycling. Furthermore, we found an inhomogeneous distribution of the Li2Ni0.5Mn1.5O4 phase in the LiNi0.5Mn1.5O4 electrode, induced by spontaneous Li migration after the formation of the Li3PO4/LiNi0.5Mn1.5O4 interface. These results indicate that the formation of a contamination-free clean Li3PO4/LiNi0.5Mn1.5O4 interface is key to increase the battery capacity.
AB - Solid-state lithium (Li) batteries using spinel-oxide electrode materials such as LiNi0.5Mn1.5O4 are promising power supplies for mobile devices and electric vehicles. Here, we demonstrate stable battery cycling between the Li0Ni0.5Mn1.5O4 and Li2Ni0.5Mn1.5O4 phases with working voltages of approximately 2.9 and 4.7 V versus Li/Li+ in solid-state Li batteries with contamination-free clean Li3PO4/LiNi0.5Mn1.5O4 interfaces. This clean interface has the effect of doubling the capacity of conventional battery cycling between the Li0Ni0.5Mn1.5O4 and Li1Ni0.5Mn1.5O4 phases. We also investigated the structural changes between the Li0Ni0.5Mn1.5O4 and Li2Ni0.5Mn1.5O4 phases during battery cycling. Furthermore, we found an inhomogeneous distribution of the Li2Ni0.5Mn1.5O4 phase in the LiNi0.5Mn1.5O4 electrode, induced by spontaneous Li migration after the formation of the Li3PO4/LiNi0.5Mn1.5O4 interface. These results indicate that the formation of a contamination-free clean Li3PO4/LiNi0.5Mn1.5O4 interface is key to increase the battery capacity.
KW - LiNiMnO
KW - electrolyte/electrode interface
KW - epitaxial thin film
KW - large battery capacity
KW - solid-state Li batteries
KW - spontaneous Li migration
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U2 - 10.1021/acsami.0c21586
DO - 10.1021/acsami.0c21586
M3 - Article
C2 - 33494591
AN - SCOPUS:85100622692
VL - 13
SP - 5861
EP - 5865
JO - ACS applied materials & interfaces
JF - ACS applied materials & interfaces
SN - 1944-8244
IS - 4
ER -