Deakin materials scientists have proven that liquid solvent-free solid state batteries can easily be made which will enable safer batteries with higher energy density.
Joule – Poly(Ionic Liquid)s-in-Salt Electrolytes with Co-coordination-Assisted Lithium-Ion Transport for Safe Batteries
Highlights
• A solvent-free poly(ionic liquid)s-in-salt electrolyte is demonstrated
• A co-coordination-assisted Li + transport is proposed for enhanced transference number
• Lithium-metal batteries with high cathode loadings are demonstrated at 80°C
Summary
Polymer electrolytes are seen as key components for safe, high-energy-density all-solid-state lithium (Li) batteries, given their appropriate mechanical properties along with the absence of volatile and flammable solvents. Here, we report a class of solvent-free polymer electrolytes by using poly(diallyldimethylammonium) bis(fluorosulfonyl)imide (PDADMA FSI) and a high content of Li bis(fluorosulfonyl)imide (LiFSI) salt. A homogeneous mixture, with a Li + ion transference number of 0.56, is found at a 1:1.5 mole ratio of PDADMA FSI:LiFSI, whereas crystalline phases are observed at higher LiFSI contents. Molecular dynamics (MD) simulations indicate a co-coordination of the FSI anion with both the Li + and the polymer backbone, and this co-coordination is maximized at 1:1.5 mole ratio, which facilitates Li + transport. The optimized electrolyte has been demonstrated to support long-term stable Li-metal symmetrical cycling as well as Li-metal battery cycling (Li | LiFePO 4 and Li | Li 1/3Ni 1/3Mn 1/3CoO 2) at elevated temperature, with areal capacity higher than 1.1 mAh cm −2.
Brian Wang is a prolific business-oriented writer of emerging and disruptive technologies. He is known for insightful articles that combine business and technical analysis that catches the attention of the general public and is also useful for those in the industries. He is the sole author and writer of
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He gave the recent keynote presentation at Monte Jade event with a talk entitled the Future for You. He gave an annual update on molecular nanotechnology at Singularity University on nanotechnology, gave a TEDX talk on energy, and advises USC ASTE 527 (advanced space projects program). He has been interviewed for radio, professional organizations. podcasts and corporate events. He was recently interviewed by the radio program Steel on Steel on satellites and high altitude balloons that will track all movement in many parts of the USA.
He fundraises for various high impact technology companies and has worked in computer technology, insurance, healthcare and with corporate finance.
He has substantial familiarity with a broad range of breakthrough technologies like age reversal and antiaging, quantum computers, artificial intelligence, ocean tech, agtech, nuclear fission, advanced nuclear fission, space propulsion, satellites, imaging, molecular nanotechnology, biotechnology, medicine, blockchain, crypto and many other areas.
