Print Email Facebook Twitter Reviving the rock-salt phases in Ni-rich layered cathodes by mechano-electrochemistry in all-solid-state batteries Title Reviving the rock-salt phases in Ni-rich layered cathodes by mechano-electrochemistry in all-solid-state batteries Author Wang, Zaifa (Yanshan University) Wang, Zhenyu (Guilin Electrical Equipment Scientific Research Institut, Gulin) Xue, Dingchuan (The Pennsylvania State University) Zhao, Jun (Yanshan University) Zhang, Xuedong (Xiangtan University, Xiangtan) Geng, Lin (Yanshan University) Li, Yanshuai (Yanshan University) Du, Congcong (Yanshan University) Wagemaker, M. (TU Delft RST/Storage of Electrochemical Energy) Date 2023 Abstract The rock-salt phase (RSP) formed on the surface of Ni-rich layered cathodes in liquid-electrolyte lithium-ion batteries is conceived to be electrochemically "dead". Here we show massive RSP forms in the interior of LiNixMnyCo(1−x-y)O2 (NMC) crystals in sulfide based all solid state batteries (ASSBs), but the RSP remains electrochemically active even after long cycles. The RSP and the layered structure constitute a two-phase mixture, a material architecture that is distinctly different from the RSP in liquid electrolytes. The tensioned layered phase affords an effective percolation channel into which lithium is squeezed out of the RSPs by compressive stress, rendering the RSPs electrochemically active. Consequently, the ASSBs with predominant RSP in the NMC cathode deliver remarkable long cycle life of 4000 cycles at high areal capacity of 4.3 mAh/cm2. Our study unveils distinct mechano-electrochemistry of RSPs in ASSBs that can be harnessed to enable high energy density and durable ASSBs. Subject All-solid-state batteriesMechano-electrochemistryNi-rich cathodesRock-salt phases To reference this document use: http://resolver.tudelft.nl/uuid:8bc48e89-d9a9-4024-b4cb-01c0982e70e7 DOI https://doi.org/10.1016/j.nanoen.2022.108016 Embargo date 2023-07-01 ISSN 2211-2855 Source Nano Energy, 105 Bibliographical note Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public. Part of collection Institutional Repository Document type journal article Rights © 2023 Zaifa Wang, Zhenyu Wang, Dingchuan Xue, Jun Zhao, Xuedong Zhang, Lin Geng, Yanshuai Li, Congcong Du, M. Wagemaker, More Authors Files PDF 1_s2.0_S2211285522010941_main.pdf 9.56 MB Close viewer /islandora/object/uuid:8bc48e89-d9a9-4024-b4cb-01c0982e70e7/datastream/OBJ/view