Citation: Li Yanping, Gao Ge, Feng Chuanqi, Yan Dongwei, Zhou Shaoxiong. Study on the Preparation and Electrochemical Performance of Ni_0.8Co_0.15Al_0.05C₂O₄@Graphene Composites[J]. Chemistry, ;2017, 80(11): 1049-1054. shu

Study on the Preparation and Electrochemical Performance of Ni_0.8Co_0.15Al_0.05C₂O₄@Graphene Composites

Li Yanping ^1,2 ,
Gao Ge ³ ,
Feng Chuanqi ³ ,
Yan Dongwei ^1,2,, ,
Zhou Shaoxiong ^1,2,,

1.
China Iron & Steel Research Institute Group, Beijing 100081
2.
Research and Development Center, Advance Technology & Materials Co., Ltd, Beijing 100081
3.
College of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062

Corresponding author: Yan Dongwei, dwyan@iccas.ac.cn Zhou Shaoxiong, sxzhou@atmcn.com
Received Date: 11 July 2017
Accepted Date: 4 August 2017

Figures(5)

Transition metal oxalate/graphene composites have excellent electrochemical performance which are widely used in lithium ion batteries. In this work, with the raw materials of NiSO₄·6H₂O, CoSO₄·7H₂O, Al₂(SO₄)₃·18H₂O and H₂C₂O₄ at a certain molar ratio prepared into solution, precursor Ni_0.8Co_0.15Al_0.05C₂O₄ was obtained by hydrothermal reaction for 12 h under 120℃. Then transition metal oxalate/graphene composites Ni_0.8Co_0.15Al_0.05C₂O₄@Graphene were prepared by reduction of graphene oxide. And the structure, morphology and electrochemical properties of materials were characterized by X-ray diffraction (XRD) and scanning electron microscope (SEM). SEM indicated that all the samples were cuboid with uniform size and irregular shape. Electrochemical test showed that the capacity of NCA-C₂O₄@G was higher than that of NCA-C₂O₄. And the first discharge capacity of NCA-C₂O₄@G composites at 0.1 C density is 1956 mAh/g. After at 0.1 C, 0.2 C, 0.5 C, 1.0 C, 2.0 C for cycles, the discharge capacity of composite material could be quickly increased to 720 mAh/g when the test conditions recovered to 100 mA/g, and the capacity keeps stable in the subsequent 50 cycles. These indicated that as-prepared NCA-C₂O₄@G composites have good electrochemical performance.
- Ni_0.8Co_0.15Al_0.05C₂O₄,
- Hydrothermal reaction,
- Transition metal oxalate,
- Graphene,
- Composites
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Study on the Preparation and Electrochemical Performance of Ni_0.8Co_0.15Al_0.05C₂O₄@Graphene Composites