Synthesis, characterization and electrochemical behavior of Zn-doped MnO/C submicrospheres for lithium ion batteries
Source abstract
Abstract
We report a synthesis, characterization and unique electrochemical behavior of Zn-doped MnO/carbon hybrid submicrospheres (denoted as Zn-MnO/C) as an anode material for lithium ion batteries (LIBs). The Zn-MnO/C submicrospheres are prepared via the volatilization of Zn from polydopamine coated ZnMn 2O 4 submicrospheres through a thermal treatment in an inert atmosphere at 800 °C, during which Zn ions in ZnMn 2O 4 is reduced to metallic Zn by the polydopamine-derived carbon and volatilize greatly with the increase of temperature. The obtained Zn-MnO/C composite submicrospheres show a long cycle life and deliver an anverage capacity of 680 mAh g −1 when employed as an anode for LIBs between 0.01 and 3 V vs. Li/Li + at 500 mA g −1. It is also found that after extended cycling, hexagonal ZnMn 2O 4 nanoplates are formed in the Zn-MnO/C electrode after cycling, and CV test reveals the presence of a new oxidation peak at a higher oxidation voltage, indicating the formation of ZnMn 2O 4 is due to the further reaction of ZnO and MnO during the delithation process.
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Research context
OpenAlex topics: Advancements in Battery Materials · Supercapacitor Materials and Fabrication · Advanced Battery Materials and Technologies
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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