TY  - JOUR
AU  - Tang, Xiao
AU  - Liu, Hao
AU  - Su, Dawei
AU  - Notten, Peter H. L.
AU  - Wang, Guoxiu
PY  - 2018
TI  - Hierarchical sodium-rich Prussian blue hollow nanospheres as high-performance cathode for sodium-ion batteries
JO  - Nano Research
SN  - 1998-0124
SP  - 3979
EP  - 3990
VL  - 11
IS  - 8
AB  - Recently, Prussian blue and its analogues (PBAs) have attracted tremendous attention as cathode materials for sodium-ion batteries because of their good cycling performance, low cost, and environmental friendliness. However, they still suffer from kinetic problems associated with the solid-state diffusion of sodium ions during charge and discharge processes, which leads to low specific capacity and poor rate performances. In this work, novel sodium iron hexacyanoferrate nanospheres with a hierarchical hollow architecture have been fabricated as cathode material for sodium-ion batteries by a facile template method. Due to the unique hollow sphere morphology, sodium iron hexacyanoferrate nanospheres can provide large numbers of active sites and high diffusion dynamics for sodium ions, thus delivering a high specific capacity (142 mAh/g), a superior rate capability, and an excellent cycling stability. Furthermore, the sodium insertion/extraction mechanism has been studied by in situ X-ray diffraction, which provides further insight into the crystal structure change of the sodium iron hexacyanoferrate nanosphere cathode material during charge and discharge processes.
UR  - https://doi.org/10.1007/s12274-018-1979-y
DO  - 10.1007/s12274-018-1979-y