Beijing Polytech Univ, Dept Environm & Energy, Beijing 100022, Peoples R China
; Univ Sci & Technol China, Dept Chem, Hefei 230000, Peoples R China
; Chinese Acad Sci, Inst High Energy Phys, Beijing 100039, Peoples R China
Electronic and structural aspects of chemical modified MnO2 electrode were investigated by extend X - ray fine structure technology. The results show that doped bismuth exists in lattice of MnO2, which improves stability of MnO2 stmctury. The oxidation value of bismuth is steady. The first shell coordination number decreases with the increase of the Mn - O distance. There is no structural rearrangement of the Mn atoms under the conditions of 1 - e discharge.