Chem. Sci., 2026, Accepted Manuscript DOI: 10.1039/D6SC03942A, Edge Article Wentao Lin, Shuo Niu, Shukai Wu, Chao Fang Quasi solid-state thermocells (QTECs) based on the thermogalvanic effect offer a promising route for directly converting abundant low-grade heat into electricity. Introducing a single solvent into hydrogel electrolytes, a common...