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Updated: Feb 11, 2026

Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
Published on: August 12, 2013
A Universal Organic Cathode for Ultrafast Lithium and Multivalent Metal Batteries
Xiulin Fan1, Fei Wang2, Xiao Ji1
1Department of Chemical and Biomolecular Engineering, University of Maryland, College Park, MD, 20742, USA.
Abstract:
Low-cost multivalent battery chemistries (Mg2+ , Al3+ ) have been extensively investigated for large-scale energy storage applications. However, their commercialization is plagued by the poor power density and cycle life of cathodes. A universal polyimides@CNT (PI@CNT) cathode is now presented that can reversibly store various cations with different valences (Li+ , Mg2+ , Al3+ ) at an extremely fast rate. The ion-coordination charge storage mechanism of PI@CNT is systemically investigated. Full cells using PI@CNT cathodes and corresponding metal anodes exhibit long cycle life (>10000 cycles), fast kinetics (>20 C), and wide operating temperature range (-40 to 50 °C), making the low-cost industrial polyimides universal cathodes for different multivalent metal batteries. The stable ion-coordinated mechanism opens a new foundation for the development of high-energy and high-power multivalent batteries.
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