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Hydrothermal Fabrication of MnCO3@rGO Composite as an Anode Material for High-Performance Lithium Ion Batteries
journal contribution
posted on 2014-09-02, 00:00 authored by Liankai Zhou, Xianghua Kong, Min Gao, Fang Lian, Baojun Li, Zhongfu Zhou, Huaqiang CaoThe
layer structure of graphene or reduced graphene oxide (rGO) opens
an avenue for the development of advanced functional materials. In
this paper, a MnCO3@rGO composite (MGC) was fabricated
by anchoring MnCO3 nanoparticles (NPs) on rGO sheets in
the hydrothermal reduction process of graphene oxide by using NaBH4. MnCO3 NPs with an average diameter of 8–20
nm were anchored onto the surface of rGO. The layer structure of rGO
was maintained in MGC. The MGC was employed as an anode active material
for lithium ion batteries. Excellent performances were obtained with
a high specific capacity up to 857 mA·h·g–1 after 100 cycles. The various charging–discharging current
rates of 0.2–5.0 C exhibited no clear negative effect on the
recycling stability of the MGC. The enhanced structure stability and
ion and electron conductivity of the MGC are responsible for the superior
electrochemical properties.