钠
材料科学
离子
阴极
化学工程
化学
冶金
工程类
物理化学
有机化学
作者
Xiang Ao,Dongyan Shi,Peng Chen,Xiao Hui Li,Qiufen Tu,Dahui Liu,Xiangguang Zhang,Ji-Qing Lu,Yijian Jiang,Ze Yang,Pei Hu
出处
期刊:Batteries
[MDPI AG]
日期:2024-04-03
卷期号:10 (4): 121-121
标识
DOI:10.3390/batteries10040121
摘要
Developing cost-effective cathode materials is conducive to accelerating the commercialization of sodium-ion batteries. Na4Fe3(PO4)2P2O7 (NFPP) has attracted extensive attention owning to its high theoretical capacity, stable structure, and low cost of raw materials. However, its inherent low conductivity hinders its further application. Herein, carbon-coated NFPP nanospheres are anchored to crumpled MXene nanosheets by an electrostatic self-assembly; this cross-linked structure induced by CTAB not only significantly expands the contact area between particles and improves the electronic conductivity, but also effectively reduces the aggregation of NFPP nanoparticles. The as-designed Na4Fe3(PO4)2(P2O7)@C/Ti3C2Tx (NFPP@MX) cathode exhibits a high discharge capacity (106.1 mAh g−1 g at 0.2 C), good rate capability (60.4 mAh g−1 at 10 C), and a long-life cyclic stability (85.2% capacity retention after 1000 cycles at 1 C). This study provides an effective strategy for the massive production of high-performance NFPP cathodes and broadens the application of MXene in the modification of other cathode materials.
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