Hydrogen-bond chemistry inhibits Jahn–Teller distortion caused by Mn 3d orbitals for long-lifespan aqueous Zn//MnO2 batteries

By introducing NH 4 + , hydrogen-bond-modulated MnO 2 nanoflowers inhibit the stretching of the [MnO 6 ] octahedra along the z axis, reduce the occurrence of Jahn–Teller distortion, and achieve long-lifespan aqueous Zn//MnO 2 batteries.