首页|Flower-like Fe-doped NiSe2/C hybrid spheres fabricated by a glucose-intercalation strategy for enhanced sodium storage properties

Flower-like Fe-doped NiSe2/C hybrid spheres fabricated by a glucose-intercalation strategy for enhanced sodium storage properties

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Nickel diselenide(NiSe2),which has a high theoretical capacity,has attracted considerable attention as a promis-ing anode material for sodium-ion batteries(SIBs).Nevertheless,the intrinsically low conductivity,large volume variation,and significant aggregation of NiSe2 during sodiation/desodiation remain significant obstacles to its application.Herein,we report flower-like Fe-doped NiSe2/C hybrid spheres(denoted as Fe-NiSe2/C)fabricated by a glucose intercalation strategy for efficient sodium storage.These Fe-NiSe2/C hybrid spheres are composed of thin porous carbon nanosheets decorated with Fe-NiSe2 nanoparticles.In situ introduced carbon nanosheets derived from intercalated glucose accompanied by moderate Fe doping in NiSe2 nanoparticles can provide ac-celerated ion/electron transfer kinetics through fast ion channels in the flower-like architecture and intimately contacted interfaces between NiSe2 and carbon nanosheets as well as maintain structural integrity by alleviating volume variation.Consequently,the optimal anode of the Fe-NiSe2/C hybrid spheres delivered a high discharge capacity of 415 mAh g-1 at 0.5 A g-1,outstanding rate capability(243 mAh g-1 at 5 A g-1),and significantly enhanced cycling stability(388 mAh g-1 at 1 A g-1 over 200 cycles).This work offers an efficient and valu-able strategy for realizing tailored heteroatom doping in transition metal selenides,accompanied by an in situ combination of conductive carbonaceous networks for advanced alkali metal ion batteries.

Glucose-intercalationFe-doped NiSe2Carbon nanosheetsSodium-ion batteries

Cheng Liu、Yi Wen、Gaoya Ren、Yaxuan Li、Qianqian Sun、Shenghui Shen、Zhujun Yao、Yefeng Yang

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School of Materials Science and Engineering,Zhejiang Sci-Tech University,Hangzhou 310018,China

Institute of Wenzhou,Zhejiang University,Wenzhou 325036,China

Zhejiang Provincial Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaShanxi-Zheda Institute of Advanced Materials and Chemical EngineeringScience and Technology Program of Zhejiang University Institute of Wenzhou

LY21E020010521023152021SZ-TD006XMGL-KJZX-202206

2024

10.1016/j.chphma.2024.01.004

化学物理材料(英文)

化学物理材料(英文)

ISSN：
年,卷(期)：2024.3(2)
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