无机材料学报2025，Vol.40Issue(5)：497-503,前插6-前插8,10.DOI:10.15541/jim20240490
Na4FexP4O12+x/C钠离子电池正极材料的结构演变及其电化学性能
Structural Evolution and Electrochemical Performance of Na4FexP4O12+x/C Cathode Materials for Sodium-ion Batteries
摘要
Abstract
The development of low-cost and long-lifespan sodium-ion battery(SIB)cathode materials is crucial for large-scale energy storage.Iron-based phosphate cathode materials have attracted significant attention in recent years for their high theoretical capacity,excellent structural stability and rich resources.Here,a series of Na4FexP4O12+x/C(x=2.6-3.3)electrode materials are prepared using Sol-Gel technique and thermal treatment process.Effect of the phase structure on electrochemical performance of Na4FexP4O12+x/C electrode materials is investigated.It is found that three phases,including Na2FeP2O7(NFPO),Na4Fe3(PO4)2P2O7(NFPP)and NaFePO4(NFP),mainly exist in the Na4FexP4O12+x/C system.Among Na4FexP4O12+x/C electrode materials,Na4Fe3.1P4O15.1/C electrode material with the highest content of NFPP phase possesses rapid electronic and sodium-ion conduction characteristics,thereby exhibiting the optimal electrochemical performance.As a result,the SIB equipped with Na4Fe3.1P4O15.1/C electrode material shows high reversible capacity,with a discharge specific capacity of 102.8 mAh·g-1 at a current density of 0.1C(1C=129 mAh·g-1),as well as capacity retention of 88.7%after 700 cycles.Furthermore,the as-assembled battery exhibits excellent rate performance with a discharge specific capacity of 61.5 mAh·g-1 at a current density of 5C.关键词
钠离子电池/铁基磷酸盐/相转变/电化学性能Key words
sodium-ion battery/iron-based phosphate/phase transition/electrochemical performance分类
化学工程引用本文复制引用
万俊池,杜路路,张永上,李琳,刘建德,张林森..Na4FexP4O12+x/C钠离子电池正极材料的结构演变及其电化学性能[J].无机材料学报,2025,40(5):497-503,前插6-前插8,10.基金项目
河南省重点研发专项(241111240300) （241111240300）
郑州轻工业大学博士科研基金(2024BSJJ021) （2024BSJJ021）
河南省杰出外籍科学家工作室(GZS2024016) （GZS2024016）
中原学者工作站项目(234400510015) （234400510015）
郑州市科技惠民计划项目(2023KJHM0028)Key Program of Henan Province for Science and Technology(241111240300) （2023KJHM0028）
Doctoral Science Research Foundation of Zhengzhou University of Light Industry(2024BSJJ021) （2024BSJJ021）
Henan Outstanding Foreign Scientists Studio(GZS2024016) （GZS2024016）
Zhongyuan Scholar Workstation Funded Project(234400510015) （234400510015）
Zhengzhou Science and Technology for People Project(2023KJHM0028) （2023KJHM0028）
