ACS Appl Mater Interfaces. 2019 Feb 6;11(5):5107-5113. doi: 10.1021/acsami.8b19874. Epub 2019 Jan 28.
Sponge-like three-dimensional porous carbon-encapsulated NaFe(PO) nanoparticles (labeled to NFPO@SC) were manufactured by a sol-gel method followed by multistage calcinations and utilized as the cathode material for sodium-ion batteries. The excellent electrochemical performance of the NFPO@SC cathode can be attributed to its unique porous structure, which facilitates electrolyte penetration, reduces the diffusion path of sodium ions, and increases electronic conductivity. In addition, the full battery is assembled by NFPO@SC and hard carbon, which are employed as cathode and anode electrodes, respectively. The full battery delivers a high discharge capacity (112.2 mA h g at 0.5 C) and maintains 93.9% stable capacity over 1000 cycles at 5 C.
采用溶胶-凝胶法结合多步煅烧工艺制备了具有海绵状三维多孔结构的碳包覆 NaFe(PO) 纳米颗粒（标记为 NFPO@SC），并将其用作钠离子电池的正极材料。NFPO@SC 正极的优异电化学性能归因于其独特的多孔结构，这有利于电解质渗透，降低钠离子的扩散路径，并提高电子电导率。此外，该全电池由 NFPO@SC 和硬碳组装而成，分别用作正极和负极电极。全电池在 0.5 C 时具有 112.2 mA h g 的高放电容量，并在 5 C 时经过 1000 次循环后保持 93.9%的稳定容量。
