正交晶系
材料科学
插层(化学)
兴奋剂
面(心理学)
动力学
Crystal(编程语言)
离子
电解质
电导率
化学工程
晶体结构
纳米技术
结晶学
电极
无机化学
光电子学
物理化学
化学
社会心理学
心理学
人格
计算机科学
程序设计语言
五大性格特征
工程类
物理
有机化学
量子力学
作者
Xiaodi Liu,Yufeng Tang,Dan Zhang,Guangyin Liu,Xinwei Luo,Yi Shang,Xiu Li,Jianmin Ma
标识
DOI:10.1016/j.gee.2022.09.009
摘要
Orthorhombic Nb2O5 (T-Nb2O5) is attractive for fast-charging Li-ion batteries, but it is still hard to realize rapid charge transfer kinetics for Li-ion storage. Herein, F-doped T-Nb2O5 microflowers (F-Nb2O5) are rationally synthesized through topotactic conversion. Specifically, F-Nb2O5 are assembled by single-crystal nanoflakes with nearly 97% exposed (100) facet, which maximizes the exposure of the feasible Li+ transport pathways along loosely packed 4g atomic layers to the electrolytes, thus effectively enhancing the Li+-intercalation performance. Besides, the band gap of F-Nb2O5 is reduced to 2.87 eV due to the doping of F atoms, leading to enhanced electrical conductivity. The synergetic effects between tailored exposed crystal facets, F-doping, and ultrathin building blocks, speed up the Li+/electron transfer kinetics and improve the pseudocapacitive properties of F-Nb2O5. Therefore, F-Nb2O5 exhibit superior rate capability (210.8 and 164.9 mAh g−1 at 1 and 10 C, respectively) and good long-term 10 C cycling performance (132.7 mAh g−1 after 1500 cycles).
科研通智能强力驱动
Strongly Powered by AbleSci AI