Journal of Materials Chemistry A , 2015, DOI: 10.1039/c5ta07390a Flower-to-petal structural conversion and enhanced interfacial storage capability of hydrothermally crystallized MnCO3 via the in situ mixing of graphene oxide Shiqiang Zhao, Fan Feng, Faqi Yu and Qiang Shen* Graphene oxide (GO) possesses high electron conductivity and good chemical-binding ability and thus can be used as a multifunctional additive for the preparation and application of electrode materials. As for the hydrothermal crystallization of MnCO 3 herein, the absence of GO causes the formation of MnCO3 flower- like architectures composed of secondary spindles, while the presence of GO induces the ower-to-petal structural conversion and results in MnCO 3 spindle–GO composites. When applied as Li-ion battery anodes, the composite electrode delivers an initial coulombic e ciency (CE) of 71% and a reversible capacity of 1474 mA h g 1 in the 400th cycle, much higher than those of MnCO3 flowers (the initial CE 58%, the 400th capacity 1095 mA h g 1 ) operated under the same conditions. In particular, the combination of discharging behavior and its di erential capacity pro le has been successfully used to estimate the interfacial contribution fraction (42%) of the whole reversible capacity (i.e., 1474 mA h g 1 ) enhanced by the in situ mixing of 8.3 wt% GO. JMCA201511-MnCO3排好版.pdf JMCA201511-MnCO3排好版-sp.pdf
标签: MnCO3
