Soft‑template‑assisted synthesis of N‑doping layered CoS2 nanoparticles as an advanced anode for sodium‑ion batteries

서지정보

ㆍ발행기관 : 한국탄소학회 ㆍ수록지정보 : Carbon letters / 33권 / 6호
ㆍ저자명 : Danyang Han, Guo Yu, An Liu, Gangyong Li, Wei Wang, Binhong He, Zhaohui Hou, Hong Yin

목차

Soft-template-assisted synthesis of N-doping layered CoS2 nanoparticles as an advanced anode for sodium-ion batteries
Abstract
1 Introduction
2 Experimental section
2.1 Materials preparation
2.2 Structure and morphology characterization
2.3 Electrochemical tests
3 Result and discussion
3.1 Characterization of N–C@CoS2 composite
3.2 Sodium-ion storage performance
4 Conclusions
Anchor 12
Acknowledgements
References

영어 초록

As a promising anode for sodium-ion batteries (SIBs), cobalt sulfide ( CoS2) has attracted extensive attention due to its high theoretical capacity, easy preparation, and superior electrochemical activity. However, its intrinsic low conductivity and large volume expansion result in poor cycling ability. Herein, nitrogen-doped carbon-coated CoS2 nanoparticles (N–C@ CoS2) were prepared by a C3N4 soft-template-assisted method. Carbon coating improves the conductivity and prevents the aggregation of CoS2 nanoparticles. In addition, the C3N4 template provides a porous graphene-like structure as a conductive framework, affording a fast and constant transport path for electrons and void space for buffering the volume change of CoS2 nanoparticles. Benefitting from the superiorities, the Na-storage properties of the N–C@CoS2 electrode are remarkably boosted. The advanced anode delivers a long-term capacity of 376.27 mAh g− 1 at 0.1 A g− 1 after 500 cycles. This method can also apply to preparing other metal sulfide materials for SIBs and provides the relevant experimental basis for the further development of energy storage materials.

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