Jump to main content
Jump to site search


Enhanced electrochemical performance of bulk type oxide ceramic lithium batteries enabled by interface modification

Author affiliations

Abstract

The interface issue is one of the severe problems in all-solid-state (ASS) batteries, especially for oxide-type batteries with a full ceramic structure. Rigid interfacial contact between electrodes and electrolyte and poor mechanical properties of ceramics limit the choices of applicable materials and fabrication processes for ASS batteries. In this report, a bulk type ASS lithium battery with an initial discharge capacity of 112.7 mA h g−1 is successfully fabricated. A garnet-structured Li6.75La3Zr1.75Ta0.25O12 (LLZO-Ta) ceramic pellet is used as the solid electrolyte. A slurry of a composite cathode consisting of Li[Ni0.5Co0.2Mn0.3]O2, In2(1−x)Sn2xO3, Li3BO3, and polyvinylidene fluoride was tape-cast on the LLZO-Ta pellet and annealed to improve the interfacial contact among the particles in the composite cathode as well as between the composite cathode and the electrolyte pellet. Without the surface modification of a Li[Ni0.5Co0.2Mn0.3]O2 active material, an obvious degradation of discharge capacity due to polarization is observed during cycling. When a layer of a Li–Ti–O precursor is coated on the surface of Li[Ni0.5Co0.2Mn0.3]O2 particles, in situ spinel Li[Ti0.1Mn0.9]2O4 is formed at the surface after annealing, leading to an enhancement of discharge capacity of the battery and great improvement for cycling stability. This novel method of interface modification reduces the interfacial polarization with an enhanced Li+ transfer between the cathode and the electrolyte. Our experimental results reveal that the interface engineering by means of reasonable regulation on the surface constituent of electrode materials can effectively improve the capacity and cycling stability of ASS lithium batteries.

Graphical abstract: Enhanced electrochemical performance of bulk type oxide ceramic lithium batteries enabled by interface modification

Back to tab navigation

Supplementary files

Publication details

The article was received on 03 Aug 2017, accepted on 20 Nov 2017 and first published on 22 Nov 2017


Article type: Paper
DOI: 10.1039/C7TA06833F
Citation: J. Mater. Chem. A, 2018, Advance Article
  •   Request permissions

    Enhanced electrochemical performance of bulk type oxide ceramic lithium batteries enabled by interface modification

    T. Liu, Y. Zhang, X. Zhang, L. Wang, S. Zhao, Y. Lin, Y. Shen, J. Luo, L. Li and C. Nan, J. Mater. Chem. A, 2018, Advance Article , DOI: 10.1039/C7TA06833F

Search articles by author

Spotlight

Advertisements