Manipulation of an ionic and electronic conductive interface for highly-stable high-voltage cathodes

Deng, Sixu; Wang, Biqiong; Yuan, Yifei; Li, Xia; Sun, Qian; Doyle-Davis, Kieran; Banis, Mohammad Norouzi; Liang, Jianneng; Zhao, Yang; Li, Junjie; Li, Ruying; Sham, Tsun-Kong; Shahbazian-Yassar, Reza; Wang, Hao; Cai, Mei; Lu, Jun; Sun, Xueliang

doi:10.1016/j.nanoen.2019.103988

Title: Manipulation of an ionic and electronic conductive interface for highly-stable high-voltage cathodes

Journal Article · Tue Aug 06 00:00:00 EDT 2019 · Nano Energy

DOI:https://doi.org/10.1016/j.nanoen.2019.103988· OSTI ID:1581999

Deng, Sixu ^[1]; Wang, Biqiong ^[1]; Yuan, Yifei ^[2]; Li, Xia ^[1]; Sun, Qian ^[1]; Doyle-Davis, Kieran ^[1]; Banis, Mohammad Norouzi ^[1]; Liang, Jianneng ^[1]; Zhao, Yang ^[1]; Li, Junjie ^[1]; Li, Ruying ^[1]; Sham, Tsun-Kong ^[1]; Shahbazian-Yassar, Reza ^[3]; Wang, Hao ^[4]; Cai, Mei ^[5]; Lu, Jun ^[6]; Sun, Xueliang ^[1]

Univ. of Western Ontario, London, ON (Canada)
Argonne National Lab. (ANL), Argonne, IL (United States); Univ. of Illinois, Chicago, IL (United States)
Univ. of Illinois, Chicago, IL (United States)
Beijing Univ. of Technology, Beijing (China)
General Motors Research and Development Center, Warren, MI (United States)
Argonne National Lab. (ANL), Argonne, IL (United States)

A stable and conductive interface is one of the decisive factors in manipulating the performance of high voltage LiNi_0.5Mn_1.5O₄ (LNMO) cathode for Li-ion batteries. Herein, a hybrid Li₃PO₄-TiO₂ coating layer is designed as an interfacial material via controllable atomic layer deposition (ALD) on LNMO. The coating acts not just as a physical barrier to prevent the side-reactions between cathode and electrolyte at high voltage, more importantly, the hybrid coating material improves both interfacial ionic and electronic conductivities to build facile Li-ion and electron diffusion pathways for LNMO. The optimized LNMO demonstrates improved rate capability and long-life stability. The capacity retention is 81.2% comparing with 47.4% of bare LNMO at 0.5C after 300 cycles. Detailed surface structural evolution is studied via X-ray absorption near edge spectroscopy and transmission electron microscopy. Furthermore, this work provides new insights of hybrid interfacial design via ALD and promotes novel electrode architectures for batteries.

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Research Organization:: Argonne National Lab. (ANL), Argonne, IL (United States)

Sponsoring Organization:: Natural Science and Engineering Research Council of Canada; Canada Foundation for Innovation (CFI); General Motors Research and Development; Canadian Light Source, Inc.; USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V)