Synthesis, characterization and electrochemical behavior of Zn-doped MnO/C submicrospheres for lithium ion batteries

Multifunctional Cr Substitution Modulates Electrochemical Activity of Mn1–xCrxO for High-Performance Lithium-Ion Battery Anodes

“…Figure b and Figure S5 reveal the galvanostatic charge and discharge curves of the first 5 cycles of the Mn 1– x Cr x O electrode with the current density of 0.1 C. The first discharge specific capacity of MnO, Mn 0.98 Cr 0.02 O, Mn 0.96 Cr 0.04 O, Mn 0.94 Cr 0.06 O, and Mn 0.92 Cr 0.08 O are 1361.8, 1298.8, 1381.2, 1447.9, and 1320.8 mAh g –1 , respectively. In addition, the initial cycle exhibits some irreversible losses, which is a common phenomenon in conversion-type negative systems and is mainly attributed to the decomposition of the electrolyte and the formation of a SEI. − As shown in Figure b, the charge/discharge curves and the d Q /d V curves show excellent correlation. During the discharge process, the typical voltage plateau shifts from the initial near 0.24 V to near 0.6 V due to improved reaction kinetics, which is related to the reduction of Mn 2+ ions to metallic Mn.…”