High strength hydrogels enable dendrite-free Zn metal anodes and high-capacity Zn–MnO2 batteries via a modified mechanical suppression effect

Although shear modulus of gel electrolytes is generally far less than that of Zn metal, a modified mechanical suppression effect of hydrogel on the growth of Zn dendrites still can be confirmed, and a Zn–MnO 2 cell with high capacity is achieved.