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Updated: Aug 6, 2026

Solid-state Graft Copolymer Electrolytes for Lithium Battery Applications
Published on: August 12, 2013
A "cation-anion regulation" synergistic anode host for dendrite-free lithium metal batteries
Weidong Zhang1,2, Houlong L Zhuang3, Lei Fan1,2
1College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310027, China.
Abstract:
Dendritic Li deposition has been "a Gordian knot" for almost half a century, which significantly hinders the practical use of high-energy lithium metal batteries (LMBs). The underlying mechanisms of this dendrite formation are related to the preferential lithium deposition on the tips of the protuberances of the anode surface and also associated with the concentration gradient or even depletion of anions during cycling. Therefore, a synergistic regulation of cations and anions at the interface is vital to promoting dendrite-free Li anodes. An ingenious molecular structure is designed to realize the "cation-anion regulation" with strong interactions between adsorption sites and ions at the molecular level. A quaternized polyethylene terephthalate interlayer with a "lithiophilic" ester building block and an "anionphilic" quaternary ammonium functional block can guide ions to form dendrite-free Li metal deposits at an ultrahigh current density of 10 mA cm-2, enabling stable LMBs.
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