通过相变法制备的3D β-氢氧化镍纳米线/还原氧化石墨烯复合材料具有优异的电化学性能。

3D β-Ni(OH) nanowires/RGO composite prepared by phase transformation method for superior electrochemical performance.

作者信息

He Wenxiu, Li Xingsheng, An Shengli, Li Tongjun, Zhang Yongqiang, Cui Jinlong

机构信息

School of Chemistry Chemistry and Chemical Engineering, Inner Mongolia University of Science and Technology, Baotou, 014010, China.

College of Physics and Material Science, Henan Normal University, Xinxiang, 453007, China.

出版信息

Sci Rep. 2019 Jul 25;9(1):10838. doi: 10.1038/s41598-019-47120-9.

In order to improve the capacity and rate performance of nickel-metal hydride (Ni-MH) batteries, we proposed a simple phase transformation method to synthesis 3D β-nickel hydroxide nanowires/reduced graphene oxide (β-Ni(OH) NWs/RGO) composite. β-Ni(OH) nanowires with diameters of 20-30 nm and lengths up to several micrometers were decorated on RGO layers, forming 3D network structure. The 3D β-Ni(OH) NWs/RGO composite displayed a discharge capacity of 343.2 mAh/g at 0.2C, and the capacity values has almost no loss after 100th cycles. When the discharge rate was at 5C, the capacity reached a value of 272.7 mAh/g, and its capacity retention was 79.5%. It showed good capacity and rate performance as a positive material for Ni-MH batteries.