High Rate Capabilities Fe-doped EMD Electrodes for Li/MnO2 Primary Battery

作者：Liu Qiuling^*; Wang Shengping; Cheng Hong

来源：International Journal of Electrochemical Science, 2013, 8(8): 10540-10548.

• Fe-doped
• anisotropy
• high-rate
• Li/MnO2 primary battery

Fe2O3 doped MnO2 (Fe-HEMD) with various mole percents had been synthesized via a simple solid-state synthesis using electrolytic manganese dioxide (EMD). Structure and morphology of synthesized materials were characterized by X-ray diffraction and scanning electron microscope, respectively. The XRD results revealed that anisotropic changes were occurred in the lattice parameters of Fe-HEMD, demonstrating that Fe was doped into MnO2 materials. Electrochemical performances were evaluated by cyclic voltammetry, electrochemical impedance spectroscopy and galvanostatic discharge test. The 6 mol % Fe-doped MnO2 (Fe-HEMD-6) electrode exhibited an excellent discharged capacity of 164.9 mAh g(-1), which was increased by 7.5% compared with Fe-HEMD-0 at a large discharge current density of 2.0 mA cm(-2). The enhanced high rate capability of Fe-HEMD-6 can be attributed to anisotropic changes of lattice parameters.

• 出版日期2013-8
• 单位中国地质大学（北京）