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Self-Templated Formation of Fluffy Graphene-Wrapped Ni5P4Hollow Spheres for Li-Ion Battery Anodes with High Cycling Stability

Self-Templated Formation of Fluffy Graphene-Wrapped Ni5P4Hollow Spheres for Li-Ion Battery Anodes with High Cycling Stability
Zhang, ChunfeiPark, GisangLee, Byong-JuneXia, LanMiao, HeYuan, JinliangYu, Jong-Sung
DGIST Authors
Zhang, Chunfei; Park, Gisang; Lee, Byong-June; Xia, Lan; Miao, He; Yuan, Jinliang; Yu, Jong-Sung
Issue Date
ACS Applied Materials and Interfaces, 13(20), 23714-23723
Author Keywords
anodecore-shell structuregrapheneLi-ion batterynickel phosphide
AnodesChemical vapor depositionEnergy conversionFuel cellsFuel storageGrapheneIonsNickel compoundsPhosphorus compoundsSolid electrolytesTransition metalsChemical vapor deposition methodsEnergy conversion and storagesFabrication methodologyHierarchical structuresHigh reversible capacitiesLithium ion diffusionSolid electrolyte interfacesTransition metal phosphideLithium-ion batteries
Transition-metal phosphides have gained great importance in the field of energy conversion and storage such as electrochemical water splitting, fuel cells, and Li-ion batteries. In this study, a rationally designed novel fluffy graphene (FG)-wrapped monophasic Ni5P4 (Ni5P4@FG) is in-situ-synthesized using a chemical vapor deposition method as a Li-ion battery anode material. The porous and hollow structure of Ni5P4 core is greatly helpful for lithium-ion diffusion, and at the same time, the cilia-like graphene nanosheet shell provides an electron-conducting layer and stabilizes the solid electrolyte interface formed on the Ni5P4 surface. The Ni5P4@FG sample shows a high reversible capacity of 739 mAh g-1 after 300 cycles at a specific current density of 500 mA g-1. The high capacity, superior cycling stability, and improved rate capability of Ni5P4@FG are ascribed to its unique hierarchical structure. Moreover, the present efficient fabrication methodology of Ni5P4@FG has potential to be developed as a general method for the synthesis of other transition-metal phosphides. © 2021 American Chemical Society.
American Chemical Society
Related Researcher
  • Author Yu, Jong-Sung Light, Salts and Water Research Group
  • Research Interests Materials chemistry; nanomaterials; electrochemistry; carbon and porous materials; fuel cell; battery; supercapacitor; sensor and photochemical catalyst
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Department of Energy Science and EngineeringLight, Salts and Water Research Group1. Journal Articles

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