插层(化学)
材料科学
富勒烯
钠
离子
纳米技术
化学工程
无机化学
有机化学
冶金
化学
工程类
作者
Xing Wang,Yizhe Wang,Kun Ni,Jian Guan,Muqing Chen,Yanwu Zhu,Shangfeng Yang
标识
DOI:10.1002/adfm.202400185
摘要
Abstract 2D layered MXene‐based materials are applied as cation‐intercalation electrode materials for sodium‐ion batteries (SIBs) due to their layered structures but suffer from spontaneous restacking during Na + insertion and deintercalation processes, resulting in sluggish reaction kinetics and poor cycling stability. Herein, fullerene C 60 is intercalated covalently into the interlayer of Ti 3 C 2 T x MXene nanosheets by using a low‐temperature hydrothermal reaction between a water‐soluble C 60 derivative and hydrophilic MXene nanosheets, resulting in enlarged interlayer spacing of MXene nanosheets from 12.8 to 14.1 Å and consequently retarded self‐restacking. Moreover, the strong electron extraction ability of C 60 facilitates electron transfer from MXene to C 60 , enabling faster charge transport during Na + transportation. The as‐prepared C 60 @MXene hybrid is applied as a novel anode of SIBs, exhibiting outstanding electrochemical performance and super‐long cycling stability. C 60 @MXene‐based SIB delivers a specific capacity of 226.8 mAh g −1 at 0.1 A g −1 after 300 cycles, which surpasses that obtained from the pristine MXene anode, and retains 94.5% capacity at 1 A g −1 after 10 000 cycles. DFT simulations confirm that C 60 ‐induced enlarged interlayer spacing benefits Na + migrations, which is responsible for improved electrochemical performance and cycling stability.
科研通智能强力驱动
Strongly Powered by AbleSci AI