Stable Seamless Interfaces and Rapid Ionic Conductivity of Ca–CeO2/LiTFSI/PEO Composite Electrolyte for High‐Rate and High‐Voltage All‐Solid‐State Battery
By Hao Chen, David Adekoya, Luke Hencz, Jun Ma, Su Chen, Cheng Yan, Huijun Zhao, G. Cui, Shanqing Zhang. Advanced Energy Materials, 2020
336 citations recorded by the source corpus.
Stable and seamless interfaces among solid components in all‐solid‐state batteries (ASSBs) are crucial for high ionic conductivity and high rate performance. This can be achieved by the combination of functional inorganic material and flexible polymer solid electrolyte. In this work, a flexible all‐solid‐state composite electrolyte is synthesized based on oxygen‐vacancy‐rich Ca‐doped CeO2 (Ca–CeO2) nanotube, lithium bis(trifluoromethanesulfonyl)imide (LiTFSI), and poly(ethylene oxide) (PEO), namely Ca–CeO2/LiTFSI/PEO. Ca–CeO2 nanotubes play a key role in enhancing the ionic conductivity and mechanical strength while the PEO offers flexibility and assures the stable seamless contact between the solid electrolyte and the electrodes in ASSBs. The as‐prepared electrolyte exhibits high ionic conductivity of 1.3 × 10−4 S cm−1 at 60 °C, a high lithium ion transference number of 0.453, and high‐voltage stability. More importantly, various electrochemical characterizations and density functional theory (DFT) calculations reveal that Ca–CeO2 helps dissociate LiTFSI, produce free Li ions, and therefore enhance ionic conductivity. The ASSBs based on the as‐prepared Ca–CeO2/LiTFSI/PEO composite electrolyte deliver high‐rate capability and high‐voltage stability.
Subfields: Electrical and Electronic Engineering
View Paper: https://www.semanticscholar.org/paper/745c4e1deb14e266c99b9446eab040fc4ce454f0
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In Electrical and Electronic Engineering
Citations in the corpus
- The critical role of inorganic nanofillers in solid polymer composite electrolyte for Li + transportation (2021, methodology): “Chen et al.(110) added Ca–CeO2 nanotubes to PEO electrolyte by electrospinning and subsequent high‐temperature treatment to obtain ionic conductivity and transference number of 1.”
- PEO based polymer in plastic crystal electrolytes for room temperature high-voltage lithium metal batteries (2021, background): “PIPCE is also superior to Ca-CeO2/PEO composite electrolyte in terms of oxidation voltage and charge capacity [40].”