Jump to main content
Jump to site search
PLANNED MAINTENANCE Close the message box

Scheduled maintenance work on Wednesday 22nd May 2019 from 11:00 AM to 1:00 PM (GMT).

During this time our website performance may be temporarily affected. We apologise for any inconvenience this might cause and thank you for your patience.

Acid Induced Conversion towards Robust and Lithiophilic Interface for Li-Li7La3Zr2O12 Solid-State Battery


Solid-state lithium batteries (SSBs) promise high energy and power densities as well as enhanced safety owing to the use of Li metal and nonflammable solid-state electrolytes. Particularly, cubic garnet–type Ta-substituted Li7La3Zr2O12 (LLZTO) is prominent for high ionic conductivity and stable nature against Li metal. However, poor interfacial contact of Li/LLZO interface is an emerging obstacle for demanding applications. Herein, to tackle this problem, a novel and facile strategy is demonstrated using H3PO4 to react with the Li2CO3/LiOH passivation layer of the LLZTO surface to form a uniform Li3PO4 modification layer. The Li3PO4 layer not only promotes the interfacial wettability by reducing the significant difference of surface energy, but also produces a robust solid electrolyte interphase (SEI) to inhibit lithium dendrite penetration. The symmetric cell exhibits a dramatically reduced interfacial resistance of 7.0 Ohm∙cm2 and an ultrastable galvanostatic cycling, over 1600 hours at 0.1 mA cm-2 and over 450 hours at 0.5 mA cm-2. Besides, hybrid solid-state full cells matching with different cathodes also display excellent electrochemical performances. LiFePO4 exhibits a stable cycling (~150 mAh g-1) and good rate performance. Especially for S cathode, coulombic efficiencies remain higher than 99% during 200 cycles. Ternary NCM523 cathode also confirms the anodic interfacial stability up to high voltage (4.5V). Therefore this facial strategy provides a stepping stone for future applications of solid-state Li-ion and Li-S batteries.

Back to tab navigation

Supplementary files

Publication details

The article was received on 20 Feb 2019, accepted on 23 Apr 2019 and first published on 26 Apr 2019

Article type: Paper
DOI: 10.1039/C9TA01911A
J. Mater. Chem. A, 2019, Accepted Manuscript

  •   Request permissions

    Acid Induced Conversion towards Robust and Lithiophilic Interface for Li-Li7La3Zr2O12 Solid-State Battery

    Y. Ruan, Y. Lu, X. Huang, J. Su, C. Sun, J. Jin and Z. Wen, J. Mater. Chem. A, 2019, Accepted Manuscript , DOI: 10.1039/C9TA01911A

Search articles by author