Pore Perforation of Graphene Coupled with In Situ Growth of Co3Se4 for High‐Performance Na‐Ion Battery

Author:

Liu Tao1,Yang Yu2,Cao Shaowen2,Xiang Ronghua1,Zhang Liuyang1,Yu Jiaguo1ORCID

Affiliation:

1. Laboratory of Solar Fuel Faculty of Materials Science and Chemistry China University of Geosciences 388 Lumo Road Wuhan 430074 P. R. China

2. State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Luoshi Road 122 Wuhan 430070 P. R. China

Abstract

AbstractGraphene‐based nanomaterials have sprung up as promising anode materials for sodium‐ion batteries due to the intriguing properties of graphene itself and the synergic effect between graphene and active materials. However, the 2D graphene sheet only allows the rapid diffusion of sodium ions along the parallel direction while that of the vertical direction is difficult, limiting the rate capability of graphene‐based electrode materials. To tackle this problem, pore‐forming engineering has been employed to perforate graphene and concurrently achieve the in situ growth of Co3Se4 nanoparticles. The generation of in‐plane nanohole breaks through the physical barriers of the graphene nanosheets, enabling the fast diffusion of electrolyte ions in the longitudinal direction. In addition, this design limits the aggregation of Co3Se4 nanoparticles because of the high affinity of Co3Se4 on graphene. Benefiting from the high conductivity and fast ion transport bestowed by the ingenious architecture, the Co3Se4/holey graphene exhibits a remarkable rate performance of 519.5 mAh g−1 at 5.0 A g−1 and desirable cycle stability. Conclusions drawn from this investigation are that the transport of sodium inside the graphene‐based composites is crucial for rate performance enhancement and this method is effective in modifying graphene‐based nanomaterials as potential anode materials.

Funder

National Natural Science Foundation of China

Publisher

Wiley

Subject

Mechanical Engineering,Mechanics of Materials,General Materials Science

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