石墨烯
材料科学
碳纳米纤维
钠离子电池
纳米纤维
二硫化钼
纳米技术
电化学
导电体
碳纤维
电池(电)
化学工程
电极
碳纳米管
复合材料
复合数
化学
功率(物理)
量子力学
物理化学
法拉第效率
工程类
物理
作者
Mingkai Liu,Peng Zhang,Zehua Qu,Yan Yan,Chao Lai,Tianxi Liu,Shanqing Zhang
标识
DOI:10.1038/s41467-019-11925-z
摘要
Abstract Long-term stability and high-rate capability have been the major challenges of sodium-ion batteries. Layered electroactive materials with mechanically robust, chemically stable, electrically and ironically conductive networks can effectively address these issues. Herein we have successfully directed carbon nanofibers to vertically penetrate through graphene sheets, constructing robust carbon nanofiber interpenetrated graphene architecture. Molybdenum disulfide nanoflakes are then grown in situ alongside the entire framework, yielding molybdenum disulfide@carbon nanofiber interpenetrated graphene structure. In such a design, carbon nanofibers prevent the restacking of graphene sheets and provide ample space between graphene sheets, enabling a strong structure that maintains exceptional mechanical integrity and excellent electrical conductivity. The as-prepared sodium ion battery delivers outstanding electrochemical performance and ultrahigh stability, achieving a remarkable specific capacity of 598 mAh g −1 , long-term cycling stability up to 1000 cycles, and an excellent rate performance even at a high current density up to 10 A g −1 .
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