We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
High-entropy metal oxide containing hybrid electrolyte for long-life Li-metal batteries.
- Authors
Mingsheng Li; Liqi Wang; Yongzheng Shi; Jikai Zhang; Qi Zhu; Jiaxiang Shang; Bin Li; Shubin Yang
- Abstract
Solid-state electrolytes are responsible for transporting lithium (Li) ions between electrodes in solid-state batteries and are essential for high-safety and high-energy Li-metal batteries. Developing novel solid-state electrolytes with high ionic conductivity and good interfacial contact is an urgent need. Here, to this end, a solid-state hybrid electrolyte is developed by mixing high-entropy Li-containing metal oxide (Lix(Mg0.2Co0.2Ni0.2Cu0.2Zn0.2)1-xO, HEOLi) matrix and poly(ethylene oxide)--Li salt binder and casting on polytetra-fluoroethylene (PTFE) substrate. By virtue of the low Li-ion migration energy barrier of the HEOLi (0.36 eV) and the strong interaction between the oxygen vacancies of the HEOLi and the Li salt anions, a biphasic transport of Li ions in both inorganic and polymeric phases of the hybrid electrolyte is achieved, yielding a high ionic conductivity of 3 x 10-4 S cm-1 at 30°C. The Li/Li symmetric cells with the hybrid electrolyte show a low overpotential of 45 mV and a long cycle life of more than 2500 h. Furthermore, coupled with the LiFePO4 cathodes and metallic Li anodes, solid-state full cells with the hybrid electrolyte deliver a high capacity of 150 mAh g-1, stable cycle performance and high safety. Consequently, hybrid electrolytes based on high-entropy metal oxides have broad application prospects in solid-state electrochemical energy storage and are expected to achieve Li-metal batteries with high-safety, high-energy density and long life.
- Subjects
METALLIC oxides; LITHIUM-ion batteries; ELECTROLYTES; INTERFACIAL tension; POLYTEF; ACTIVATION energy
- Publication
Oxford Open Materials Science, 2022, Vol 2, Issue 1, p1
- ISSN
2633-6979
- Publication type
Article
- DOI
10.1093/oxfmat/itac011