fig1
From: Reversible sulfate-anion involved charge storage in layered MnO2 for aqueous symmetric batteries
Figure 1. Structural and spectroscopic characterizations of layered MnO2. (A) SEM image, (B) TEM image, and (C) SAED image of the as-prepared layered MnO2. (D) Powder XRD pattern of the layered MnO2 powder.
