Polymer-in-Ceramic Nanocomposite Solid Electrolyte for Lithium Metal Batteries Encompassing PEO-Grafted TiO Nanocrystals
Journal of the Electrochemical Society, ISSN: 1945-7111, Vol: 167, Issue: 7
2020
- 29Citations
- 41Captures
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Article Description
Lithium Metal Batteries (LMB) require solid or quasi-solid electrolytes able to block dendrites formation during cell cycling. Polymer-in-ceramic nanocomposites with the ceramic fraction exceeding the one normally used as the filler (>10 ÷ 15 wt%) are among the most interesting options on the table. Here, we report on a new hybrid material encompassing brush-like TiO nanocrystals functionalized with low molecular weight poly(ethylene oxide) (PEO). The nanocomposite electrolyte membranes are then obtained by blending the brush-like nanocrystals with high molecular weight PEO and LiTFSI. The intrinsic chemical compatibility among the PEO moieties allows a TiO content as high as ∼39 wt% (90:10 w/w functionalized nanocrystals/PEO-LiTFSI), while maintaining good processability and mechanical resistance. The 50:50 w/w nanocomposite electrolyte (18.8 wt% functionalized TiO) displays ionic conductivity of 3 × 10 S cm at 70 °C. Stripping/plating experiments show an excellent long-term behavior even at relatively high currents of 200 μA cm. Upon testing in a lab-scale Li/electrolyte/LiFePO cell, the material delivers 130 mAh g and 120 mAh g after 40 and 50 cycles at 0.05 and 0.1 mA, respectively, with Coulombic efficiency exceeding 99.5%, which demonstrates the very promising prospects of these newly developed nanocomposite solid electrolyte for future development of LMBs.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=85084594820&origin=inward; http://dx.doi.org/10.1149/1945-7111/ab7c72; https://iopscience.iop.org/article/10.1149/1945-7111/ab7c72; https://dx.doi.org/10.1149/1945-7111/ab7c72; https://validate.perfdrive.com/fb803c746e9148689b3984a31fccd902/?ssa=f116c335-b9ab-4fbe-b238-efbc3a2862af&ssb=86346249723&ssc=https%3A%2F%2Fiopscience.iop.org%2Farticle%2F10.1149%2F1945-7111%2Fab7c72&ssi=ddf88e31-8427-4c21-a5a6-493890ea6320&ssk=support@shieldsquare.com&ssm=19927071705827163262157283485611987&ssn=854ed288ef337edfce1319bb7e043da071a5a8b91149-14d5-48cc-acac75&sso=861e3fda-70752116f6f640606f18713489944dcc82622d8c9e0dd3ee&ssp=83740451361715442640171579780472540&ssq=90966417995864344489299121377389834704499&ssr=NTIuMy4yMTcuMjU0&sst=com.plumanalytics&ssu=&ssv=&ssw=&ssx=eyJyZCI6ImlvcC5vcmciLCJfX3V6bWYiOiI3ZjYwMDBmMjJmYWMwYS02NDkyLTRkODQtYmQ3MS01MTRiMzhlODIwYTcxNzE1NDk5MTIxMzEyMjgwODM3MzE4LTZlMzU0ZjZjNDYyM2M5YWIyNjIxNSIsInV6bXgiOiI3ZjkwMDA5ODhhYjdhYS1lNTVlLTQ5MGYtOTFkMS01N2M1NGU3OThkZDY0LTE3MTU0OTkxMjEzMTIyODA4MzczMTgtNDg3MzE4ZWIxNzMyZWFmNjI2MjEyIn0=
The Electrochemical Society
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