| 96 | 0 | 14 |
| 下载次数 | 被引频次 | 阅读次数 |
采用溶胶-凝胶法成功制备了碳包覆的磷酸焦磷酸铁钠[Na_4Fe3(PO4)_2P_2O7@C，缩写为NFPP@C]复合材料，其最优化热处理温度为600℃，烧结时间为10 h。将NFPP@C作为钠离子电池正极材料，分别以金属钠(Na)和硬碳(HC)作为负极材料，评测其电化学储钠性能。在1.5～4.0 V(vs. Na+/Na)电压区间下，NFPP@C||Na半电池在0.1 C和5 C电流密度下的放电比容量分别为112.2 mAh/g和96.2 mAh/g，且电流密度为1 C时，循环200次后的容量保持率高达99.7%。在1.5～3.5 V(vs. HC)电压区间、1 C电流密度下，3.5 Ah全电池(即NFPP@C||HC软包单体电池)在25℃常温和45℃高温环境中循环2 800次后的容量保持率分别为92%和89.1%，表现出优异的长循环稳定性和高温工作性能。
Abstract：The carbon-coated sodium ferric pyrophosphate [Na_4Fe3(PO4)_2P_2O7@C, abbreviated as NFPP@C] composite material was successfully prepared using the sol-gel method, with an optimized heat treatment temperature at 600 ℃ and sintering time of 10 hours. NFPP@C was used as a cathode material for sodium-ion batteries, paired with metallic sodium(Na) and hard carbon(HC) as the anode materials, to assess its electrochemical sodium storage performance. Within the voltage range of 1.5～4.0 V(vs. Na+/Na), the discharge specific capacities of NFPP@C||Na half cells at 0.1 C and 5 C current densities were 112.2 mAh/g and 96.2 mAh/g, respectively. At 1 C current density, the capacity retention rate after 200 cycles reaches 99.7%. In the voltage range of 1.5～3.5 V(vs. HC) and at 1 C current density, the 3.5 Ah full-cell(i.e., NFPP@C||HC soft-pack single cell) exhibited excellent long-cycle stability and high-temperature performance, with capacity retentions rates of 92% and 89.1% after 2 800 cycles at 25 ℃ and 45 ℃, respectively.
[1]李瑞，何祥飞，郭美卿，等．钠离子电池磷基聚阴离子型正极材料研究进展[J]．长沙理工大学学报(自然科学版)，2023,20(3):14-31．
[2]陈前，杨烜，郑步高，等．钠离子电池技术进展与展望[J]．科技中国，2025(12):87-93．
[3]唐宪友，卢昀坤，代海玲，等．钠离子电池阴极材料的研究进展与优化策略[J]．精细石油化工，2025,42(6):49-52．
[4]LIU S,LEUNG P,ZUO Y,et al.High voltage flexible sodium-ion battery cathode materials based on 1D covalent organic framework[J].Advanced Science,2025,12(31):e05311．
[5]张鼎，周启坤，刘镇铭，等．钠离子电池正极材料磷酸焦磷酸铁钠的研究进展[J]．南京工业大学学报(自然科学版)，2024,46(3):235-250．
[6]WANG Y,DENG F X,OUYANG S W,et al.Current progress of Na4Fe3(PO4)2(P2O7):Key issues,modifications,and perspectives[J].Journal of Energy Chemistry,2025,111:914-934．
[7]邓立伟，游济远，曹永安，等．铁基磷酸盐钠离子正极材料研究进展[J]．能源研究与利用，2024(2):38-45．
[8]ZHAO A L,YUAN T C,LI P,et al.A novel Fe-defect induced pure-phase Na4Fe2.91(PO4)2P2O7 cathode material with high capacity and ultra-long lifetime for low-cost sodium-ion batteries[J].Nano Energy,2022,91:106680．
[9]ZHANG L Q,SUN R,LIANG Y H,et al.Carbon quantum dot dual-regulation for constructing highperformance NFPP cathode:Synergistic breakthrough in electron conductivity and ion transport[J].Energy Storage Materials,2025,81:104548．
[10]XIONG F Y,LI J T,ZUO C L,et al.Mg-doped Na4Fe3(PO4)2(P2O7)/C composite with enhanced intercalation pseudocapacitance for ultra-stable and high-rate sodium-ion storage[J].Advanced Functional Materials,2023,33(6):2211257．
[11]LI H F,LIU M C,SHI J,et al.Green and low-cost modified Na4Fe3(PO4)2(P2O7) cathode material for sodium-ion batteries with wide temperature operation[J].Journal of Alloys and Compounds,2026,1051:185967．
[12]QI X R,DONG Q Y,DONG H H,et al.Copperinduced lattice distortion in Na4Fe3(PO4)2(P2O7) cathode enabling high power density Na-ion batteries with good cycling stability[J].Energy Storage Materials,2024,73:103861．
[13]宋登峰，黎扬，韩影，等．二次碳包覆+N掺杂Na4Fe2.91Cu0.09(PO4)2P2O7钠离子电池高倍率正极材料[J]．广东化工，2026,53(1):24-28．
[14]LI Z,LI F K,XU X J,et al.A scalable approach to Na4Fe3(PO4)2P2O7@carbon/expanded graphite as cathode for ultralong-lifespan and low-temperature sodiumion batteries[J].Chinese Chemical Letters,2025,36(10):110390．
[15]蔡雨洋，程翰文，陈卓，等．高倍率及长循环稳定钠离子电池的硫掺杂碳界面相互作用促进Na4Fe3(PO4)2(P2O7)的动力学研究[J].Science China (Materials),2025,68(10):3675-3684.
基本信息:
DOI：10.19996/j.cnki.ChinBatlnd.2026.01.004
中图分类号:TM912;TB332
引用信息:
[1]裴满,马恬,陈宇,等.碳包覆Na_4Fe_3(PO_4)_2P_2O_7@C正极材料的制备及其钠离子电池性能[J].电池工业,2026,30(01):17-23.DOI:10.19996/j.cnki.ChinBatlnd.2026.01.004.