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Chemcial Industry and Engineering 2020, Vol. 37 Issue (1) :58-68    DOI: 10.13353/j.issn.1004.9533.20191901
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Construction and Energy Storage Properties of WS2 Nanostructures
Bai Ling, Fang Yanwu, Gu Xiaotian, Cai Yuqing, Zhang Chenyu, Zhang Encong, Yu Xuezhi, Gao Chenchen, Zhang Meng, Huang Zhendong
School of Materials Science and Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210023, China

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Abstract In response to the market's huge demand for high-performance lithium storage and sodium storage anode materials, and in order to solve the key limitations of metal sulfides, a series of tungsten sulfides with different morphology and nanostructures such as nanorods, nanoblocks and microspheres are designed and successfully developed. The experimental results indicate that WS2 nanorods show a better energy storage performance than WS2 nanoblocks and microspheres, due to the larger specific surface area, short diffusion distance and better crystallinity. Furthermore, a layer of graphene is coated on the surface of WS2 nanorods as a modification layer by freeze-drying method. As a results, the structural stability and rate capability of the as-prepared graphene@WS2 nanorods composites are effectively improved. Therefore, sodium-ion storage capacity of as-prepared graphene@WS2 nanorods composites is still maintained at 65.9 mAh·g-1 after being cycled at 500 mA·g-1 for 500 cycles. And the corresponding lithium-ion storage capacity can be maintained at 288.3 mAh·g-1 after being cycled at 1 000 mA·g-1 for 500 cycles.
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Articles by authors
Bai Ling
Fang Yanwu
Gu Xiaotian
Cai Yuqing
Zhang Chenyu
Zhang Encong
Yu Xuezhi
Gao Chenchen
Zhang Meng
Huang Zhendong
Keywordstungsten disulfides;   graphene;   nanowires;   nanoblocks;   nanostructured microspheres;   energy storage performance     
Received 2019-09-10;
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Bai Ling, Fang Yanwu, Gu Xiaotian, Cai Yuqing, Zhang Chenyu, Zhang Encong, Yu Xuezhi, Gao Chenchen, Zhang Meng, Huang Zhendong.Construction and Energy Storage Properties of WS2 Nanostructures[J]  Chemcial Industry and Engineering, 2020,V37(1): 58-68
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