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《Journal of Electrochemistry》 2018-03
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Co_3(HCOO)_6@rGO as a Promising Anode for Lithium Ion Batteries

JIANG Heng;FAN Jing-min;ZHENG Ming-sen;DONG Quan-feng;State Key Laboratory for Physical Chemistry of Solid Surfaces, Department of Chemistry, College of Chemistry and Chemical Engineering, iChem (Collaborative Innovation Center of Chemistry for Energy Materials), Xiamen University;  
Metal-organic framework(MOF) is a kind of novel electrode materials for lithium ion batteries. Here, a composite material Co_3(HCOO)_6@rGO was synthesized for the first time by in situ loading of Co_3(HCOO)_6 on rGO(reduced oxide graphene)through a solution chemistry method. As an anode material for lithium ion batteries, it exhibited an excellent cycle stability as well as a large reversible capacity of 926 mAh·g~(-1) at a current density of 500 mA·g~(-1) after 100 cycles within the voltage range of 0.02 ~3.0 V vs. Li/Li+ with a good rate capability. The results of cyclic voltammetry and XPS measurements revealed that both Co~(2+) and formate ions in Co_3(HCOO)_6@rGO underwent reversible electrochemical reactions during the charge and discharge processes.Compared with Co_3(HCOO)_6 synthesized through the same method, it was found that rGO could activate the electrochemical reaction of formate ion, which improved the Co_3(HCOO)_6 rate performance. A new route was demonstrated through this work to enhance the specific capacity and rate capability of MOFs by introducing rGO.
【Fund】: 973项目(No.2015CB251102);; 国家自然科学基金项目(No.U1305246 No.21673196 No.21621091)资助
【CateGory Index】: TM912
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